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Drying Techniques

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

Drying techniques are agricultural practices applied to assist with the balance of moisture in grains post-harvest, determined by a combination of ambient temperature and relative humidity. Spoiling due to insufficiently dried grain is one of the main causes of grain deterioration, loss in grain quality, and thus market value. Grains have the capability to absorb or evaporate moisture, and a balance of moisture content in the air and grains should be sought to achieve an Equilibrium Moisture Content (EMC). EMC prevents the formation of moulds that may affect the quality of grains, spread of pests and germination of grain seeds. After harvest, transportation and threshing, grain needs to be further dried to be preserved. Natural drying techniques are based on ambient air circulation to reduce the moisture content of the grain before storage. Artificial drying techniques apply fans and/or heating elements to move air and maintain constant temperatures .Natural drying (sun drying) is the preferred, commonly used agricultural technique in southern Africa and does not require use of machinery. Drying techniques preserve the contents of seeds thus assuring sustainable agricultural productivity and the practice as climate smart.

Technical Application

To effectively implement Drying Technique practices:

  • Step 1: Harvest crops.
  • Step 2: Consider the number of different crops that need to be dried.
  • Step 3: Dry the crops naturally using air temperature or direct sunlight or artificial drying through using fans or other mechanical means.
  • Step 4: Never place crops directly on the soil but rather on a cement area, woven mats or a layer of sacks.
  • Step 4: Livestock should be kept away from drying grains to prevent contamination and loss.
  • Step 5: Farmers should consult storage life charts that will help determine dry crop characteristics and approximate times for drying.
  • Step 6: Cover all drying grain at night to prevent loss or damage.
  • Step 7: Sorghum should be left on the seed, maize should be de-husked and left on the cob, grain and pulses are normally left in their pods.
  • Step 8: Monitor the stored grain by checking at least every two weeks.
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.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_38_DryingTechniques_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Prevents loss in grain quality.
  • Outside on a flat surface, drying system costs less.
  • The drying crib system can be used for many years.
  • Forced air/hot air dryer systems are not weather dependent.

Drawbacks

  • Imbalanced EMC leads to low quality seed, possible mould/decay and possible germination of grain seeds.
  • The natural drying technique is not suitable for humid climates as EMC is difficult to achieve without artificial drying.

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.

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.

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.

Half Moon Pits

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

Half-moon Pits are water harvesting techniques that assists crop growth in harsh climatic conditions, improving water and nutrient availability, promoting biodiversity and restoring the fertility of the degraded soil. The technique is similar to Zai pits in terms of its purpose. Half-moons are semi-circular wide-open basins used to collect runoff water. The mouth of the half-moons must face a slope where rainwater will flow during precipitation events. Water will be trapped in the pit to irrigate crops. Stones are used to support the half-moon curve to avoid being washed away during rain. The amount of fertilisers required in farming systems decreases when this technique is adopted by farmers. Areas with lots of rainfall are not suitable for this technique as it may lead to water logging effect.

Technical Application

To effectively implement Half-moon techniques, the following steps should be carried out:

  • Step 1: Farmers should consider the diameter of the half-moon  between 2 m – 3 m, with a total surface area of approximately 1.5 sqm and 3.5 sqm.
  • Step 2: Pits should be dug to a depth of between 15 cm to 30 cm.
  • Step 3: Excavated material can be piled around the curved section of the half-moon.
  • Step 4: The curved section of the half-moon can be reinforced by stones to prevent washouts of the half-moon.
  • Step 5: 35 kg of organic fertilisers/compost should be evenly distributed in the half-moon.
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
Half moon pits support water and nutrient availability, in turn promoting agricultural productivity, especially in harsh climates.
Increase Resilience
Retaining soil water and nutrients supports agricultural productivity.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_27_HalfMoons_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Pits are left to sit while fertiliser/compost material converts to productive soil material.
  • Half-moons allow for nutrient concentration and water infiltration that provides improved conditions for crops to grow.
  • Land that was previously degraded can become productive through the implementation of half-moons.

Drawbacks

Implementing half-moons is very laborious and takes significant people power to implement.

Zai Pits

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

Zai pits are based on a traditional technology approach originating from West Africa that assists farmers working on marginal and degraded land. This approach involves the concentration and conservation of nutrients and water at the crop root systems through the digging of small pits (Zai pits) and filling them with compost, with the aim of increasing soil fertility and water infiltration. Zai pits are dug between planting season and filled with organic fertilisers/composts, which attract worms, termites and other insects, creating mix of material that can be used to fertilise crops. Farmers plant crops directly in these pits, prior to rains and water will infiltrate the pits more easily than the surrounding soil. Applying this technology is laborious to implement, but it  has been found to assist farmers in times of drought or in arid conditions to produce successful crops by maximising the resources available. Zai pits allow for mitigation of desertification in degraded land and an economic use of resources in conditions of scarcity, especially in resource constrained environments

Technical Application

To effectively implement Zai Pits the following should be carried out:

  • Step 1: Zai pits should be dug with a diameter of 30 cm to 40 cm and 10 cm to 15 cm deep. 
  • Step 2: Pits should be spaced 70 cm to 80 cm apart resulting in approximately 10,000 pits per hectare.
  • Step 3: The farmer should place 2 – 3 handfuls (200 g to 600 g) of organic fertilisers or compost in each pit.
  • Step 4: Holes that are dug between planting seasons will trap wind eroded soils, which are fertile and form good soils for plating crops.
  • Step 5: It is recommended that 3 tonnes of fertiliser/compost per hectare be available.
  • Step 6: Farmers should consider planting crops in these pits prior to periods of rain.
  • Step 7: Repeated application of Zai pit technology on an annual basis will increase productivity of degraded land in the long term.
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
Increased soil fertility from zai pit implementation improves agricultural productivity.
Increase Resilience
This approach to fertilising crops and enhancing nutrient content can aid adaptation, especially in arid and semi-arid climates.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_26_ZaiPits_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Earth that is excavated from the hole dug can be used to form a ridge around each pit to help capture and retain water.
  • Zai pit technology can be applied to marginal or degraded land or in semi-arid to arid conditions to allow farmers to rehabilitate soil/land and productively grow crops.
  • Zai pits allow for nutrient concentration and water infiltration that provides improved conditions for crops to grow.
  • Land that was previously degraded can become productive through the use of zai pits.

Drawbacks

  • Implementing zai pits is laborious and takes significant people power to implement – but may be the only option in marginal environments.

Drip 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

Drip irrigation is a method of slow delivery of water to crops, through highly-controlled flow management, applied along the soil or at the sub-surface level directly to crop root systems. Drip irrigation is an effective system for conserving water while ensuring that it is used optimally without losing it to evaporation through high efficiency water delivery. Drip irrigation involves establishing a network of tubes, values and pipes connected to water source by a pump, along crop rows. A water source is required which is a drawback as many dryland areas lack these water sources. Drip irrigation is a climate smart option as it increases farmer resilience to the effects of climate change.

Technical Application

To effectively implement drip irrigation:

  • Step 1: A reliable water source must be available - natural (natural or through rain-water harvesting).
  • Step 2: Acquire a pump system (approximately $US 100) that maintains enough pressure to deliver water through the system or an elevated tank.
  • Step 3: Connect lines or hoses and laterals that run from the pump system across the planted fields.
  • Step 4: Run lines or hoses with emitters (drippers) or small punctures at the surface level along planted crops or just below the surface providing water to the roots system of the plants.
  • Step 5: Once the system is operable, the pump can be turned on and water dispersed as required by the nature of the crop and can also be implemented with supplemental irrigation strategies (Technical Brief 23).
  • Step 6: Monitor the irrigation system regularly to ensure there are no malfunctions and the system is maintained. Crops that receive regular water can develop shallow root systems and any prolonged disruptions in service could have   significant impacts.
  • Step 7: If applying drip irrigation in sloped conditions, follow the contours of the slope as outlined in Technical Brief 16.

Once a drip irrigation system is up and running, farmers can explore fertigation, the addition of soluble fertilisers into the irrigation system water for distribution directly to 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
Energy saving.
Increase Resilience
Increase crop yield.
Mitigate Greenhouse Gas Emissions
Continued production in changing environments.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_24_DripIrrigation_2019-10-17_0.pdf
Benefits and Drawbacks

Benefits

  • Maximises efficiency in crop irrigation in dryland or variable climate conditions.
  • Minimizes the loss of water to evaporation.

Drawbacks

  • Requires consistent water source.
  • Costs of establishing the system, pump and lines/hoses can be significant depending on configuration, etc.
  • Requires continual monitoring and may need regular maintenance.

Saving Seeds

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

The process of saving one’s own seed involves the collection of seeds from the best performing (most yield, largest size, early maturing or other desired traits, etc.) plants from one season to plant them in the next cropping season. The aim of this practice is to select seed from parent plants in the hope that desired characteristics are replicated in the next generation of plants. Seeds that have been selected will likely be adapted to local farming conditions including soil types and rainfall amounts. The seed most likely to carry intergenerational traits (size, colour, water use efficiency, and other biophysical traits) are open-pollinated (those plants pollinated by birds, insects, wind, etc.) seed varieties as they are cross-pollinated by the same type of crop. Different crops have different reproduction cycles with some species flowering or producing seeds annually, biennially or on a perennial basis. Thus, understanding seeding time is important for farmers aiming to save their own seeds. Almost as important as selecting the correct seeds is seed storage, which must be done correctly to avoid spoiling and losses. Seed saving is a cost-effective measure for farmers to employ and helps them avoid having to buy seeds at market on an annual basis. Seed trading or community seed banks provide a climate resilience strategy as they secure farmers access and availability of diverse, locally adapted crops and varieties while enhancing indigenous knowledge. Often crops from hybrid seeds or improved varieties do not generate viable seeds ensuring that seeds cannot be saved and must be purchased on an annual basis.

Technical Application

To effectively undertake seed saving:

  • Step 1: Communicate with national agricultural extension and local farmers regarding seed harvesting timing and practices for local crop species.
  • Step 2: Clear field and sow desired crop using climate smart agriculture practices.
  • Step 3: Monitor plant life cycle and ensure that seeds are extracted correctly and are not spoiled in the process. Employ local expertise to ensure seed harvesting is carried out correctly.
  • Step 4: Post-harvest, seeds should be adequately dried and then transferred to proper storage facilities.
  • Step 5: store seeds in dry, cool, and dark locations. This will prevent them from spoil. Different strategies for seed storage are implemented around the region so local expertise should be sought.
  • Step 6: Ensure that pests are excluded from storage areas to prevent loss or spoil (Technical Brief 61-65).
  • Step 7: Community seed banks or seed trading should be established to allow farmers to integrate different varieties into their farming system that are resilient to local climatic conditions
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
Can reduce losses from pests and diseases.
Increase Resilience
More predictable yields.
Additional Information
PDF File
/sites/secondsite/files/tb/CCARDESATechnicalBrief_21_SavingSeeds_2019-10-17_0_0.pdf
Benefits and Drawbacks

Benefits

  • Climate resilient method for crop diversification.
  • Many farmers have been using this technique for generations and this should be encouraged.
  • Cost effective method for sustainable crop growth.

Drawbacks

  • Attention must be closely paid to plant lifecycle and seeds should be collected at appropriate time.
  • Storage methods should be employed to manage pests and rot.

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.
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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