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Changing Harvest Time

Value Chain
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Changing harvest time refers to adjusting harvest time to focus on optimal moisture conditions, thereby avoiding losses from mould, decay and possible disease, while also considering optimal maturity of the crop. This approach encourages the reduction in potential losses of ripened grain and increases potential higher quality grain for consumption or market. Harvesting of crops when physiologically mature can minimise losses during transportation to the homestead. Physiological harvesting refers to the time when a grain (fruit, etc.) can be separated from its parent plant and continues to ripen over time. Farmers should consider planting earlier or later or consider planting faster or slower maturing varieties to avoid issues of post-harvest loss. This is a climate smart practice because it reduces potential losses of ripened grain, increase the quality of grain harvested, and is overall a more efficient use of resources, all while mitigating the spread of diseases and reducing GHG emissions.

Technical Application

To effectively implement Changing Harvest Time practices:

  • Step 1: Consider researching recent rainfall records and consult national meteorological services to as accurately predict start of rainy season as possible.
  • Step 2: Farmers should consult data provided by the African Post Harvest Loss Information System (APHLIS), which provides information on harvest loss and additional resources to consult.
  • Step 3: Consult with national agricultural extension and research to determine growing periods of chosen crops. Request information about quicker or slower maturing seeds.
  • Step 4: Plant crops at the right time so as to avoid harvesting during rainy season.
  • Step 5: Harvest as soon as crops are physiologically mature.
  • Step 6: Wait 24 hours after a rain period to harvest if rain is unavoidable. This may take several days, however, harvesting crops after one rain is better than leaving it for an entire rainy season.
  • Step 7: Crops should be transported to the storage for immediate drying.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Reduces potential losses of ripened grain.
Increase Resilience
More grain of a higher quality to consume and sell.
Mitigate Greenhouse Gas Emissions
More efficient use of resources.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_37_ChangingHarvestTime_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Reduces the potential loss of ripened grain and increases potential higher quality grain for consumption or market.
  • It improves crop production, food security and farm income.

Drawbacks

  • Moisture from rainfall at harvest time can risk crop degradation post-harvest, due to mould, decay and disease.
  • Different crops have different growing seasons, and this should be known and monitored constantly, specifically as climate change has been shown to alter growing seasons, which will in turn impact harvesting times.

Best Practice Harvesting Techniques

Value Chain
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Best Practice Harvesting Techniques are formalised harvesting practices intended to reduce breakage and bruising of crops during collection and storage. These techniques minimise harvest losses and maintain the quality of the produce. To maximise this approach, factors such as moisture content, cleanness of the grain, colour, odour and potential pest infestation need to be considered during harvest periods. Considering each of these factors will increase grain value as quality standards are directly related to grain price. Harvesting can be performed manually or mechanically, with obvious cost implication of employing the latter.

Technical Application

To effectively implement Best Practice Harvesting Techniques:

  • Step 1: Obtain equipment and supplies needed for the harvest and post-harvest activities, e.g. clean sacks, drying mats, etc.
  • Step 2: Allocate drying and threshing areas, ensuring the areas are swept, dry, and there is no/limited access for livestock or rodents. If in a dry climate or season, drying outside is optimal. If necessary, construct drying cribs elevated from the ground with rodent guards on legs can reduce access for rodents.
  • Step 3: Allocate sufficient storage space for the harvested crop.
  • Step 4: Clear weeds from the farm to prevent weed seeds from contaminating the harvest.
  • Step 5: Place the harvested crop directly onto clean mats and bags to avoid contact with the soil, which may lead to moisture uptake and also prevent contamination with tiny Striga.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Reduces potential losses of ripened grain.
Increase Resilience
More grain of a higher quality to consume and sell.
Mitigate Greenhouse Gas Emissions
More efficient use of resources.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_36_BestPracticeHarvestingTech_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Best practice harvesting techniques improve grain quality and minimise post-harvest loses.

Drawbacks

  • Lodging can cause significant losses as well as contamination.

Farmer Managed Natural Regeneration

Value Chain
Climatic Zone
Water Source
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Farmer Managed Natural Regeneration (FMNR) is a technique of restoring degraded land and monitoring restoration of the land involving the systematic regeneration and management of trees and shrubs from tree stumps, roots and seed. Degraded arid land often features left over indigenous plants, which if maintained and promoted to grow can improve pasture and crop lands while simultaneously encouraging re-growth of seeds, roots and shrubs. Key to this practice is the existence of living stumps, tree roots and seed that, if encouraged, will regrow. The land is protected from being completely cleared or further grazed and this allows trees to grow without disturbance. Once the stumps and trees start to grow, pruning and trimming of trees is required to allow space between trees and promote healthy long tree trunks. Once the trees have matured, intercropping can take place or livestock can be re-introduced to graze.

While requiring some investment in terms of effort, FMNR has climate smart advantages such as controlling rainfall/irrigation run-off, supporting water quality improvements, providing sources of timber or fodder, supporting habitant regeneration for pollinator insect species, acting as sun shade, and reducing soil erosion.

Technical Application

To effectively implement Farmer Managed Natural Regeneration:

  • Step 1: Degraded land needs to be identified and living stumps, roots and seeds need to be encouraged to regrow. This may include periodic watering. Focus should be on indigenous species, and present tree species (existing stumps).
  • Step 2: Consider leaving the field un-grazed to promote tree growth.
  • Step 3: Select tree stumps and the tallest and straightest stems to grow into trees.
  • Step 4: Prune and manage by removing stems and unwanted side branches.
  • Step 5: Maintain the process by occasionally pruning side branches.
  • Step 6: Manage the land consistently to avoid overgrazing, which can lead to further degradation.
  • Step 7: Consider rotational grazing to allow seeds, stumps and underground shrubs to re-grow. This will reduce the cost of replanting. Shrubs and growing trees and saplings need to be protected before introducing livestock. Shrubs and growing trees and saplings need to be protected before introducing livestock.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Increase availability of biomass, which improves soil fertility and thus production. The trees/shrubs can be a source of income and reduce costs.
Increase Resilience
Reduces erosion of soil and evaporation. Increases water retention and infiltration. Diversifies income sources. Improves yield stability.
Mitigate Greenhouse Gas Emissions
Locks more carbon in plants and in soil.
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_35_FarmerManagedNaturalRegeneration_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • FMNR improves soil quality and reduces soil erosion.
  • Improved dry-season pasture.
  • Agricultural management practices such as pruning, and trimming are carried out appropriately in turn improving growth and air circulation.
  • Higher livestock productivity.
  • Provides protection from wind and shade for livestock, when introduced.
  • Increased availability of firewood, thatch and other non-timber forest-products/materials.

Drawbacks

  • The land needs to be managed consistently to avoid overgrazing.

Agroforestry: Silvo-Pasture

Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Agroforestry is a land management practice that combines the planting and management of trees and shrubs with crops and pasture, providing benefits of soil health, crop yields, resilience to climate change, biodiversity and economic opportunities. Agroforestry encompasses numerous practices, including silvo-pasture, agro-silvo cultural, and agro-silvo-pastural. One such successful agroforestry practice is silvo-pasture – the planting of trees and shrubs within livestock grazing pasture lands. Not to be confused with agrosilvopasture (combination of crops, shrubs/trees and livestock, silvopasture is the combination of trees and shrubs with pastural grazing land. The trees can be regularly or irregularly placed, and in addition to improving soil conditions in pasture lands, also provide production of protein-rich tree fodder for on farm feeding and for cut-and-carry fodder production. If growing larger species of tree, coppicing can also produce timber for building materials and firewood.

Technical Application

To effectively implement hedge planting:

  • Step 1: Purchase saplings of selected tree species from a local nursery or grow saplings in separate on-farm nursery. If growing on-farm, saplings should be held-up with an upright support bamboo/wooden pole. Ideally, the farmer should begin exploring silvopasture tree species beginning with indigenous trees, such as acacias, and other local trees. It is worth considering a mixture of species, as well as mixed shallower and deeper rooted trees.
  • Step 2: Once at a meter or over in height, transplant to pastures, surrounding each individual sapling with a wire mesh cage-tube or insert into five-centimetre diameter PVC pipe to protect from browsers. Plant at least ten to twenty meters apart, in either a random or uniform pattern. This is a matter of preference.
  • Step 3: Once saplings are planted, only allow grazing livestock (cows, sheep, ducks, geese, chickens) in the silvopasture, avoiding browsers (goats, etc), which will strip, damage or destroy the saplings.
  • Step 4: Once mature and above browsing height, two plus meters, remove protective cage or pipe.
  • Step 5: Depending on species, pruning, coppicing etc should be performed every two months to ensure that trees remain healthy and productive, while maximising outputs for in-field and cut and carry fodder.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Diversified agricultural outputs supports sustainable agricultural productivity, providing multiple streams of revenue, reducing labour and cost for land clearance and maintaining healthy pasture land.
Increase Resilience
As climate change alters local grazing land, silvopasture can reduce overgrazing and land degradation. Trees introduced into pasture can create a more positive environment for livestock, including shade in warmer climates, and shelter during rainfall.
Mitigate Greenhouse Gas Emissions
Retaining trees within pasture land and minimising complete conversion of land reduces greenhouse gas emissions and retains carbon in the soil.
Additional Information
  • Balehegn, M., 2017. Silvopasture Using Indigenous Fodder Trees and Shrubs: The Underexploited Synergy Between Climate Change Adaptation and Mitigation in the Livestock Sector. Chapter from book The Need for Transformation: Local Perception of Climate Change, Vulnerability and Adaptation Versus ‘Humanitarian’ Response in Afar Region, Ethiopia (pp.493-510). ResearchGate.
  • Jose, S. & Dollinger, 2019. Silvopasture: a sustainable livestock production system. Chapter in J. Agroforest Syst (2019)
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_34_SilvoPasture_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Presence of trees can be beneficial to livestock in terms of shade and shelter, as well as enhancing carbon storage and enriching biodiversity.
  • Manure from livestock can improve soil health in grazing land.
  • Leaf litter and pruned material also add organic matter to soil, improving productivity and drainage.
  • Presence of trees can contribute to reducing soil erosion.
  • Trees can produce numerous forest products, including timber for firewood and construction.
  • There is an opportunity to diversify income for small-holder farms and increase food security.
  • Tree trimmings and leaf litter can also be used for in-field or cut and carry fodder.

Drawbacks

  • Requires some investment in terms of purchase of seed and/or saplings.
  • May require adjustment for mixed grazing and browsing livestock patterns.
  • If dietary requirements of livestock are not complete, animals may strip bark from trees. This can be avoided by ensuring that pasture stocking is not too high, and best efforts are made to encourage pasture health and supplementing livestock feed with the necessary minerals, energy and protein.

Boundary Planting

Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Boundary planting, also known as live fence planting, is a technique used to protect crops from the interference of people and animals that can disturb plant growth. Trees/shrubs are a good example of this approach as they can form a shield when planted along the boundaries of the garden or surrounding a planted field. The trees/shrubs act as wind break to shield plants against strong winds causing physical damage to plants themselves, or the removal of soil (erosion). Additional benefits include the use of branches for firewood or building materials, and the other parts of trees can be used as fodder, fruit or leave harvested for consumption, or for medicinal use. Tree/shrub spacing is critical, as trees that have dense canopies can conversely cause destructive down-drafts, negating the intended benefits. Boundary planting helps limit global warming by mitigating GHG emissions through reducing harmful gases such as, carbon dioxide, from the atmosphere and releasing oxygen.

Technical Application

To effectively implement Boundary Planting practices:

  • Step 1: Plant long lines of two fast growing trees, Caesalpinia velutina trees, between a Bombacopsis quinate and a Swietenia humilis to be replaced over time.
  • Step 2: Consider planting the boundary trees 1.5 metres apart along pre-existing fences.
  • Step 3: Attach metal fencing to the trees to support the large trees without endangering their growth. Harvest fodder when the tree is overgrown.
  • Step 4: Prune lower brunches to encourage upward growth of trees and reduce shed on the plants.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Increases availability of tree shrub products (nuts, fruits, timber etc.) and biomass, which improves soil fertility, and thus production.
Increase Resilience
Reduces erosion of soil and evaporation. Increases water retention and infiltration. Diversifies income sources. Improves yield stability.
Mitigate Greenhouse Gas Emissions
Locks more carbon in plants and in the soil.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_33_BoundaryPlanting_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Live fence planting is cost effective, conserves soil moisture, acts a windbreak and reduces soil erosion. These trees have various benefits such as medicinal use, mulch, livestock feeds, fruits, bee forage, timber and firewood.
  • Maintenance of boundary trees is low with short, medium and long ecological and economic benefits.

Drawbacks

  • Boundary planting occupies more land than a single row.

Rainwater Harvesting

Annual Average Rainfall
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Rainwater harvesting is an agricultural technique of collecting and storing rainwater or runoff in tanks or natural reservoirs. This practice is mostly practiced in arid or semi-arid areas with temporal and spatial variability of rainfall mostly lost as surface runoff or evaporation. Runoff is harvested and utilised as a preventative measure for soil erosion, as well as a water management strategy for irrigating crops and for livestock water. This technique enables farmers to capture and store rainwater during times of plenty for use during times of scarcity. Rainwater harvesting is a technology that maximises the use of existing freshwater resources and is a useful technology for water resource planners and managers in both governmental and non-governmental organisations, institutions and communities.

Technical Application

To effectively implement Rainwater Harvesting practices:

  • Step 1: Create a water collection zone connected to a gutter system.
  • Step 2: Install filters to the water collection zone.
  • Step 3: Connect a hose pipe for easy distribution of irrigation water.
  • Step 4: If a farmer intends to use water for human consumption other than flushing toilets, etc, water quality must be frequently tested using reliable and low-cost/low-tech solutions.
  • Step 5: Use of filters can be considered to reduce particulate and other pollutants but should be thoroughly investigated – as a separate subject – by the extension officer and the farmer, otherwise it could lead to illness. It is recommended that farms utilise harvested rainwater for irrigation and other farming activities only.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
More water available to plants when it is needed.
Increase Resilience
Mitigate dry spells.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_30_RainwaterHarvesting_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Rainwater harvesting acts as a source of water at a point where it is needed, usually stored in a tank.
  • Works as an alternative water source in cases of drought or irrigation system breakdown.
  • Rooftop rainwater catchment construction is simple.
  • Success in rainwater harvesting depends on frequency and amount of rainfall.

Drawbacks

  • Asphalt, tar and wood roofs may contaminate the water making it unsafe for direct human consumption.
  • For potable water collection, lead containing gutters should not be used.
  • Harvested water may be contaminated by animal waste.

Solar Irrigation

Value Chain
Annual Average Rainfall
Soils
Climatic Zone
Water Source
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Solar irrigation systems utilise solar energy to pump water to fields and distribute it through drip irrigation or other systems. Solar irrigation is a low-emission agricultural technology that replaces fossil fuel irrigation pumps reducing greenhouse gas emissions. This approach has the potential to reduce energy costs for irrigation and provide energy independence in rural areas. It provides opportunities to increase productivity by shifting from rainfed to irrigated agriculture in some areas. Solar irrigation systems require intensive management and regular monitoring to ensure the sustainable use of water resources. It requires maintenance of solar panels and irrigation equipment but can quickly yield a positive return on investment. Solar irrigation can be implemented for crop irrigation and livestock watering schemes and can improve food security, produce high value crops for sale, reduce energy costs and drive rural development. Although an expensive technology, solar irrigation can introduce significant operational savings if managed and maintained appropriately. It is considered a climate smart option as it can increase productivity, enable farms to adapt t climate changes and improve resilience, and the use of solar power reduces the use of on-grid, or diesel generator power, reducing emissions.

Technical Application

To effectively implement solar irrigation:

  • Step 1: To determine the solar pump system Crop water requirements, location, water sources etc. Do required research. Is water sourced from an above ground or below ground source?
  • Step 2: Source required materials to implement a solar irrigation system from regional or international suppliers including:
    • Photovoltaic (PV) panels to generate electricity (80-300 W system depending on context);
    • a structure to mount the panels;
    • a pump controller;
    • a surface or submersible water pump; and
    • a distribution system or storage tank for water.
  • Step 3: Identify funding sources as initial costs, as well as maintenance costs, must be considered and modelled prior to purchasing a system. There are regional and international solar irrigation producers.   These costs differ dramatically given the complexity of the context, starting at costs approximately USD $2,400 for equipment only. If drilling is necessary the cost increases significantly depending on depth, substrate etc.  Community-based investment, micro-leasing and rental services can be possible funding models to explore.
  • Step 4: Determine whether there is sufficient solar irradiation for the proposed area – consult and specialist; and/or the national meteorological service.
  • Step 5: Identify area suitable to install solar panels. The area should be easily accessible, and all trees/bush should be cleared. To determine most appropriate site and angle of panels, etc, consult an expert.
  • Step 6: The availability of technical expertise must be considered before implementation to ensure that any technical issues do not result in long period of service disruption.

Maintenance costs and expertise should be considered before installing solar irrigation systems. A detailed cost benefit analysis is advisable. Other key technical considerations include: Legal permits to extract water from the source as water extraction may impact community watershed levels.

Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Plants get enough water. Potential for two or more cropping seasons per year.
Increase Resilience
Predictable yields. Higher production equals increased food security/income and resilience.
Mitigate Greenhouse Gas Emissions
Significant reductions in CO2 emissions compared to grid and diesel-fuelled systems.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_22_SolarIrrigation_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Energy independence will introduce significant cost savings for farmers.
  • Solar powered irrigation can significantly boost productivity, due to increased ability to sustainably irrigate crops.
  • Consistent irrigation can help to mitigate climate impacts, and aid adaptation.
  • Reduces operational costs for diesel or on-grid power to pump water.
  • Reduces greenhouse gas emissions.

Drawbacks

  • Solar irrigation is expensive to implement and there are costs for maintenance. Therefore, savings or access to credit will be required.
  • Access to solar equipment, spares and parts, and the transportation of the above may be complicated and/or expensive.
  • Over and above cost and access technology, other issues such as access to land and water sources are important factors.

Crop Variety Selection

Value Chain
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Selecting crop varieties is a key resilience strategy for farmers facing changing climatic conditions. There are two types of seed varieties: traditional varieties and improved varieties. Traditional varieties have been selected by farmers for their special characteristics and due to many years of selecting the strongest seeds over generations, they are generally adapted to local natural conditions. In some respects, these seeds increase the chance of getting a return on investment in stable environments, but are less likely to mitigate GHG emissions. Traditional crop varieties are usually selected by small scale farmers due to their relatively low cost and availability and can be saved and replanted for further growing seasons. Improved varieties are seeds that have been altered by scientific processes to incorporate desired characteristics using techniques such as following pure line breeding, classical breeding, hybridisation and molecular breeding. Desirable characteristics include higher yields, shorter growing seasons, drought resistance, salt tolerance, etc. Improved varieties are selected when facing adverse conditions such as higher temperatures and/or less predictable rainfall and normally result in the efficient use of water reducing use of energy for irrigation systems. While these seeds offer improvements they are usually commercial products and as a result can be expensive. Furthermore, as they are sold by seed companies availability is driven by demand. Most seed companies protect enhancements using  intellectual property rights that legally limit seed saving and replanting of seeds. In fact, many of these seed varieties have been designed to prevent plants to be reseeded. Thus, seed varieties afford farmers the opportunity to incorporate crops that can be planted to exploit their unique characteristics – traditional or improved, assisting farmers to grow crops that are resilient to changing climates to produce crops that are market-appropriate.

Technical Application

To effectively undertake leverage traditional seed characteristics, or improved crop varieties  the following should be carried out:

  • Step 1: Prior to selecting seed varieties, perform a Cost Benefit Analysis (CBA) to identify how crops will perform and their benefits compared to the costs of the seed, considering the following:
    • Local  farming system(s): land availability per household, crops traditionally grown, access to inputs such as fertilisers,
    • Local environmental conditions: soil conditions, disease, pests, climatic conditions, occurrence of flooding/droughts and other natural disasters.
    • How climate change has impacted or will impact the farming system and how crop variety selection can be a climate- smart practice.
    • Local access to seeds – is seed collected at the householder level, do neighbours exchange seeds, do farmers have access to commercially produced seeds?  Are the costs for accessing commercial, improved seeds manageable or prohibitive? The CBA should weigh the benefits of a new seed against perceived actual or transactional costs for selecting a new seed.
  • Step 2: Obtain information and guidance from local experts, lead farmers, and government regarding best varieties to grow.
  • Step 3: Evaluate results of the CBA and select appropriate seeds that match the farm system/requirements, and available financial resources/access to credit.
  • Step 4: Plant test plots of selected seeds to understand if benefits are realised and demonstrate outcomes with farmers, showing possible alternatives and discuss implementation.
  • Step 5: Following full demonstration and discussion with farmers, implement at farm level – planting the first crop in accordance with guidance provided by seed provider, or traditional knowledge.

Consider in-country seed sources to access different varieties through local extension or research services. When buying seeds ensure that the seeds are adequately dry and look for seed that is certified by a national seed laboratory to ensure that the variety is the highest quality possible. Seeds should be properly stored to avoid high temperatures and humid air to reduce chances of early germination.

Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Selecting improved seed varieties allows the farmer to maintain agricultural productivity as the climate changes.
Increase Resilience
Selection of improved varieties may assist farmers adapt agricultural production to assist adaptation to climate change.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_20_CropVarietySelection_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Exploring crop variety is a key way for farmers to grow more resilient crops within the context of changing climatic conditions. Drought resistant or faster maturing varieties, for example, allow you to respond to reduced rainfall conditions.
  • Improved crop varieties have been altered by scientific processes to incorporate desired characteristics.
  • Understanding local context is important when researching the best crop variety for the area.

Drawbacks

  • Improved crop varieties are commercially sold and can be expensive as they often require additional inputs (inorganic fertilisers etc.)
  • Traditional crops have generally adapted to local climatic and landscape conditions, are widely available and are cost effective for local populations; however, these varieties may not be resilient to climatic changes, and are less likely to mitigate GHG emissions.

Weed Control

Value Chain
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Weeds are any unwanted plant species that compete with crops for sunlight, water, nutrients, air and space, hindering crop growth and in some cases are even toxic to crop plants. Weed control measures can be applied in an integrated manner to help prevent the growth and spread of weeds in agricultural systems. An integrated weed management approach aims to restrict weed growth until a crop is well established and can outcompete weeds. This integrated approach includes biological, chemical, cultural and/or physical tactics to combat weed spread and growth and these practices can be more cost effective than herbicide applications. Integrated weed management is climate smart as it combines multiple climate smart practices that increase farmers resilience, limits GHG releases and increases productivity. Options for weed control include crop rotation, intercropping, cover crops (which can be used as green manure or mulch), mulching, seed-bed preparation, livestock grazing, seed/variety selection, mowing, and hand-weeding.

The application of integrated weed control is climate smart as it reduces herbicide application and reduction in machinery usage (i.e. through no-tillage practices).

Technical Application

To effectively undertake weed control measures:

  • Step 1: Review weed control measures - crop rotation, intercropping, cover crops, mulching, seed-bed preparation, livestock grazing, seed/variety selection, mowing, hand-weeding and adjustments to tillage practices - and determine which methods are available and appropriate for the farming system and farmer. Two or more of these techniques can be applied to assist in ensuring farmers have more chance of success. Understand possible negative impacts of each weed control method.
  • Step 2: Improve weed identification knowledge in specific areas.
  • Step 3: Prevent weeds from spreading – clean clothes, animals, machinery, vehicles to limit weed transport; use only well stored/rotted manure (4-5 months) (Knowledge Product 16), include fencing, irrigation and other farm ‘breaks’ where possible
  • Step 4: Apply a combination of weed control methods including – cover crops (Technical Brief 15), mulching, intercropping (Technical Brief 07), crop rotation (Technical Brief 09), livestock grazing, seed selection (Technical Brief 20), mowing, hand-weeding. Try to avoid the application of herbicides, tillage and burning.
  • Step 5: monitor and document most effective weed management strategies for each farmer, and use lessons learned from the area with other farmers where applicable.
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Weed control supports agricultural productivity by removing competition while reducing the need for herbicides.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_19_WeedControl_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Integrated weed management involves employing two or more climate smart practices.
  • Reduced consumption of chemicals
  • Cost effective methods that do not require additional inputs.

Drawbacks

  • More time consuming than applying herbicides or other more destructive methods.
  • Strategy requires careful planning.
  • May not be 100% effective.

Cover Crops

Value Chain
Annual Average Rainfall
Climatic Zone
Decision Making
Farming Characteristics
Mechanisation
Labour Intensity
Initial Investment
Maintenance Costs
Access to Finance/Credit
Extension Support Required
Access to Inputs
Access to Markets
Gender/Youth Smart
Description

Cover Crops are incorporated into farming systems and planted in between growing seasons with the primary purpose of preventing soil erosion and improving nutrient content, and promoting soil quality in general, rather than being planted as a regular food or cash crop. Cover crops can also be utilised for food stuff, fodder or cash crops; but these outcomes are usually secondary to the main aim of improving/retaining soil quality. An additional benefit from growing cover crops is reduction in weed growth, and pests and diseases; increases in water availability in the soil; and increased soil biodiversity. Additional benefits are recognised from cover crops in areas with steep slopes, as the retained plant cover contributes to reducing erosion. Cover crops can be combined with other practices including intercropping practices and erosion control measures to further enhance soil quality and structure. Incorporating cover crops into farming systems increases farmers resilience to climate impacts through improving soils, reducing fossil fuel consumption, and increasing soil carbon sequestering. Extension guidance can be beneficial when selecting relevant cover crops to achieve the above outcomes.

Technical Application

To effectively implement cover crops:

  • Step 1:  Research whether locally available crops (especially legumes) provide potential options for cover crops.
  • Step 2: Establish a demonstration plot could provide farmers with an example of how cover crops function.
  • Step 3: Plant cover crops between primary crop growing systems to improve soil fertility, quality and nutrients.
  • Step 4: Monitor soil structure, nutrient levels, and field integrity to ensure efficacy.
  • Step 5: Incorporate cover crops with other climate smart practices enhance soil, including: Intercropping (Technical Brief 07), Crop Rotations (Technical Brief 09) Reduced/No-tillage Options (Technical Brief 12) etc
Return on Investment Realisation Period
Crop Production
Fodder Production
Farm Income
Household Workload
Food Security
Soil Quality/Cover
Biological Diversity
Flooding
Crop/Livestock Water Availability
Wind Protection
Erosion Control
Increase Production
Cover crops improve soil conditions, providing an enabling environment for agricultural productivity.
Increase Resilience
In changing climates, cover crops can contribute to adaptation strategies, improving soil health.
Mitigate Greenhouse Gas Emissions
Retains and improves soil quality, including carbon sequestration.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_15_CoverCrops_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Cover crops protect soils from erosion and prevent soil nutrient loss.
  • Preventing weed growth, control pests and disease, increase water availability in the soil and increase soil biodiversity.
  • Cover crops may be non-traditional food crops, fodder and/or cash crops.
  • Low cost option for protecting soils and improving soil fertility.

Drawbacks

  • May take time to determine suitable to improve soils.
  • May increase labour demands as new or unfamiliar crops are incorporated into farming systems.
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Funding Partners

4.61M

Beneficiaries Reached

97000

Farmers Trained

3720

Number of Value Chain Actors Accessing CSA

41300

Lead Farmers Supported