Medium Seasonal

Vectors are organisms that carry diseases from one living being to another without showing symptoms of the diseases themselves. Some of the most common forms of vectors are blood sucking insects such as mosquitos, fleas, lice, ticks and other similar insects, and rats/rodents. Places such as stagnant water and dumping sites can be ideal habitats for vectors to reside and transmit. The use of natural vector predators can help reduce or eliminate vector populations. The most common vectors in southern Africa are insects (tsetse flies-trypanosomiasis), animals (foot and mouth disease through cattle or people with contaminated shoes), tick-borne relapsing fever (TBRF) and Crimean-Congo haemorrhagic fever (CCHF).  Sanitising the life-cycle of vectors, implementing pest traps and introducing pest predators are means of reducing the spread of disease. The impacts of climate change, especially increased heavy rainfall and higher temperatures can encourage vector populations to grow quicker than normal. Simple strategies to control vectors includes keeping livestock surroundings clean, avoiding livestock access to stagnant water, fencing areas off, restricting animal access to certain locations, can all control biological vectors and assist in reducing vector spread.

Species diversification involves a shift from a single species of livestock to more species in an attempt to manage risk and explore more resilient livestock farming options. Species diversification can be introduced in response to changes in local environment/climate conditions, including increasing temperatures, unreliable sources of water and availability of pasture, etc. The aim of this approach is to explore the introduction of species that may be more viable and adaptable in changing local conditions thus improving production levels by keeping animals that will be productive under harsh weather conditions and sustain the quality of the produce. Diversification as a climate smart practice assists farmers with utilising available resources more effectively, e.g. mixing grazers and browsers. Species that react well to changing climatic conditions may cause a shift of demand from grazers to browsers. This practice mitigates disease control, can improve soil fertility and increase water management. Government policies can also influence farmers in diversifying their species with many countries dedicating agricultural research and extension to explore the introduction of different species (e.g. cattle to goats) to assist farmers. It is important that species that are introduced do not have an adverse impact on local fauna or the surrounding environment.

Assisted reproduction refers to artificial insemination, where semen is deliberately introduced to fertilise eggs in domestic animals. Artificial insemination helps in obtaining genetic improvements that yield higher production levels. This practice is more expensive but more efficient than natural reproduction. Artificial insemination reduces the risk of disease transmission and injuries or accidents during mating. Sperm duplication can be done from a single ejaculation to make hundreds of doses and distributed across farmers to have variety of breeds rather than off-spring from single bulls. This prevents inbreeding and promotes hybrid vigour among farmers’. In the southern African context, where most grazing is communal, use of bulls to improve breeds can be challenging as it is difficult to adopt a grazing system that will ensure good quality breeds are able to pass their progeny to the next generation, as young and likely non-superior bulls are likely to mate with cows during grazing. To achieve genetic improvement using open grazing requires controlled grazing systems, e.g. by use of paddocks to manage bulls grazing and mixing with cows.

Hybridisation is the agricultural practice of genetically manipulating flora and fauna that differ in heredity. Hybridisation and mutations are the main source of hereditary variation and can result in the increased growth rate, manipulated gender ratios, increased yields, sterile animals, improved flesh quality, increase disease resistance and improve environmental tolerance. Intraspecific hybridisation method is used for livestock breeding whereby individuals of different breeds or strains are mated. Distant hybridisation for livestock is difficult to accomplish as hybrids are usually sterile. Hybrid animals are extremely difficult to produce and specialists often spend their careers attempting to create a new breed of animal. Hybridisation is plant species is more common and has a greater success rate than animal species, however successfully creating a hybrid species remains difficult to achieve. Specialists are trained on the gene sequence and different methods for accomplishing hybridisation. The development of hybrid flora and fauna is often undertaken to address a problem or issue. For example, to address socio-economic challenges agricultural researchers may attempt to produce a species of chickens who lay lager eggs or cows who produce more milk. Hybridisation is also applied to address the challenges of a changing climate including producing crops that are more drought resistant. Due to the research and development of these hybrid species they are expensive to access and often not available in remote areas. Traditional breeds are pure individual species with no DNA alterations. They are often endemic to an area and because of this have evolved and adapted to the geophysical area they are found. Thus, traditional breeds are often found in certain areas, and through traditional knowledge have been incorporated into local farming systems for generations. With an increasingly globalised world, it is difficult to maintain distinct traditional breeds as trade in species, seeds etc. is increasingly prevalent. However, with a new focus and dedication of farmers and researchers to explore indigenous knowledge there is an increased focus on reinvigorating the incorporation of traditional breeds of both flora and fauna.

Manure is organic matter that is used as an organic fertiliser in agricultural practices, conditioning and adding nutrients to soil, generally derived from animal faeces. Manure is the best source of fertiliser available to a farmer, as it can be readily available from livestock, and it a more environmentally friendly option over synthetic fertilisers. Animal manure, compost and green manure are the three different types of manure used in soil management. Manure is collected in different forms: liquid manure, slurry manure or solid manure, and treated in different systems depending on its state. Liquid and slurry manure are stored in liquid (slurry) manure storage systems whereas solid manure is stored in sacks in order to allow air and toxic vapours to move in and out, as well as to maintain the moisture content. The manure is collected and treated (as described below) in order to kill pests that may feed on crops during the application period. The manure is further cleaned to remove unwanted substances such as sticks, and large lumps formed in the manure.

Rotational grazing is a practice of moving livestock between different units of pasture in regular sequence to allow the recovery and regrowth of pasture plants after grazing. This facilitates management of the nutritional needs of the various types of livestock whilst maintaining pasture productivity. Management of intensive grazing/controlled grazing is a climate smart practice as it results in improved forage harvest, soil fertility, resistance to drought, reduced pasture weeds establishment, reduced wastage of forage and soil compaction.

Rotational grazing can also be combined with cut and carry approaches - when managed correctly; rotational grazing can provide enough forage growth early in the grazing season for producers to harvest feed for later use in some paddocks as rotation continues. Farmers can use temporary fence systems to manage the size of, and access to pastures.

Cut and carry is the agricultural practice of cutting and carrying fodder crops away from the field that they are grown in to feed to livestock. Fodder trees, shrubs or grasses are sources for livestock feed in this practice. Cut and Carry is a key CSA practice where overgrazing is a problem. This practice takes pressure off grazing land at critical periods, reduces land degradation caused by livestock and increases soil organic matter, while still feeding livestock for productive outcomes. This practice can also be used in more intensive livestock production where livestock are kept housed for periods stretching from half a year to a year and improved nutrition is required. However, fodder production can be costly in terms of cultivation, requiring significant management over and above the livestock themselves. Fodder is collected from sites where it grows naturally, or it can be grown in fodder banks, hedges, boundaries, etc. Feeding livestock using this approach can ensure the supply of a large quantity of high quality and palatable fodder within a short time, as well ensuring soil is not disturbed through open grazing systems, thus a good CSA practice. It can be adapted to the farmer’s needs and can provide a way of introducing the farmer to the concept of improving livestock at the same time as conserving soil.

Palatability - referring to plant features or conditions that encourage animals to feed on the plant when given a choice – is important as the ability or willingness of animals to feed on specific forage determines the efficiency of production of animal products. When feed is consumed in larger quantities, depending on its nutritive value, it helps increase milk and/or meat production. Plants with stiff and harsh leaves are generally not palatable to animals, unlike those with softer leaves and grass. The nutritive value of the plant matters when it comes to palatability. Palatability will be determined by the texture, aroma, succulence, hairiness, leaf percentage, sugar content and other factors. Moreover, leaves are more palatable than stems. Palatability of plants can be increased by grazing livestock at the optimal grass growing stage before seed formation, using a High Intensity, Low Frequency (HILF) grazing pattern which allows uniform grazing of pastures and gives an allowance for regrowth and thus overall, uniform soil cover. Addressing palatability is often of greater concern during dry season, when grazing/pasture is less common, and farmers have to rely on stored silage.

Fodder is the agricultural term for animal feed. Fodder trees and shrubs play an important role in bridging the gap between livestock feed requirements and the low quality and quantity of feeds available to many farmers. As well as providing feed or acting as a feed supplement for livestock, fodder trees and shrubs supply other benefits, such as firewood and erosion control. Fodder trees are either grown in-situ, from seed, and others are planted in nurseries and then transplanted to the field at the beginning of the rainy season. The transplanting method can be more successful than the direct planting - as high as 34 % better, but with a 24 % increase in cost per plant. Benefits of using fodder trees and shrubs as a dietary supplement include improved growth, health and reproductive capacity, and increased milk and meat production, mostly through increased protean uptake. Fodder trees and shrubs can be planted as living fences, field boundaries and in tree/shrub plantations. Popular species include African acacias, and Atriplex nummularia, Cassia petersiana, C. mopane, D. cineria, F. albida, Julbernadia paniculata, P. reclinata, Piliostigma thonningii, Swartizia madagascariensis and Trema orientalis.

Farmers of all categories can use this climate smart sustainable approach to produce both livestock and field crops to obtain improve benefits, improving nutrition for livestock animals, improving soil health, reducing cost of livestock feeding, and as a result increasing income

Carrying capacity defines the number of Animal Units (AU; head of cattle or number of sheep, goats or other animals) that can graze in a rangeland unit without exhausting the vegetation and soil quality – essentially optimally utilising resources. Optimum carrying capacity is where a given unit of rangeland can support healthy populations of animal species, while allowing an ecosystem to regenerate, thus creating a sustainable balance. The stocking rate - defined as the number of animal species grazing a unit of rangeland for a limited period - must be kept fixed on an average year, meeting the carrying capacity to allow regeneration, the fallen seeds to rejuvenate and the soil to recover. However, stocking rates can fluctuate depending on the nature of the vegetation, rainfall variability, herd composition and management system. If the conditions are not favourable for vegetation growth during drought season, the number of livestock or the grazing period must be adjusted to avoid overgrazing. Moreover, the purpose of livestock keeping, i.e. for milk, meat, or wool production, will determine the carrying capacity of a rangeland unit. Factors such as climatic zone, rainfall dependency, class of livestock (steer, dry cow, calves, lactating cow and bull, etc), health of grassland and animal species affect the stocking rate. While relevant in all climatic zones, it is more applicable in arid and semi-arid zones where rainfall is most scarce. This climate smart practice increases production (meat/dairy), increases pasture resilience to extreme climate hazards (drought) and enhances soil fertility.