In those days, the trip to Europe took many weeks, but his arrival in the Dutch port was not the end of his long journey. This is where the timing of the new World Bank funds earmarked for Ethiopia is suspicious.
Priority has therefore been given to a range of measures for run-off and soil erosion control. One such measure, the use of stone bunds built on natural contour lines, has been promoted and supported by governments, NGOs, extension agents and farmers for more than 25 years and is now widely used in the Sahel.
The best results are often achieved when contour stone bunds are used in combination with the planting of grass and trees on the contour lines. In wetter years they help to reduce the climate-induced risk of run-off and erosion.
In drier years, they contribute to effective rainwater harvesting.
In addition, since heavy rainfall events in the Sahel are projected to increase with global warming, durable and effective soil erosion control structures will assume even greater importance and constitute an important adaptation measure.
Impacts and lessons learned Region-wide, it is estimated that aboutha of land has been reclaimed. However, contour stone bunds are labour intensive and costly. However, this required the quarrying and transport of 2. Nevertheless, they have proven to be both highly effective and durable and often act as a catalyst for additional innovations such as tree or grass planting on the bunds, as well as increased levels of nutrient inputs on field crops.
Neither practices based solely on mineral fertilizers nor solely on organic matter management are sufficient for sustainable agricultural production. Well-adapted, disease- and pest-resistant germplasm is necessary to make efficient use of available nutrients.
Good agronomic practices - in terms of planting dates, planting densities, and weeding - are essential for ensuring the efficient use of scarce nutrient resources.
In addition to these principles, ISFM recognizes the need to target nutrient resources within crop rotation cycles, preferably including legumes, thus going beyond recommendations for single crops. As a result, the efficiency of rainfall-use is greatly enhanced. IFSM advocates strategic timing and placement when using inorganic nitrogenous fertilizers, often at rates that are much lower than recommendations based on the sole use of inorganic fertilizers.
This contributes to mitigation through reduced nitrous oxide emissions. For example, in Malawi, about 30, farmers, as well as several hundred farmer associations and agricultural extension workers, have been trained in ISFM technologies Nyasimi et al.
However, for widespread adoption to occur, an enabling environment must be created through: Governments that acts as enablers for fertilizer imports. An effective extension service, able to deliver the technology to the farmers. A vibrant agro-dealer private sector that ensures efficient fertilizer and seed availability and distribution.
This is necessary due to the variability that exists between farms. Each and every farm is distinguished in terms of farmer goals, farm size, labour availability, ownership of livestock, importance of off-farm income, as well as in the amount of production resources such as cash, crop residues and animal manures that different farming families are able to invest in their farm.
More recently, it has become widely promoted and adopted in Latin America. In Africa, however, adoption rates by small-scale farmers has been slower and more context specific FAO CA is based on three principles Richards et al.
Retention of crop residues or other soil surface cover: Use of crop rotations: Crop rotation, ideally with legumes, helps reduce build-up of weeds, pests and diseases. Where farmers do not have enough land to rotate crops, intercropping can be used.
Relationship to CSA CA supports adaptation through reduced risk of rainfall run-off and soil erosion and can help buffer against drought through increased storage of water in the soil profile.
CA can mitigate climate change through carbon sequestration in the soil, though this benefit may not be as large on a global level as has been hoped Richards et al.
Positive economic returns and less use of water, labor, nitrogen, and fossil fuel energy per unit food produced were also achieved Ladha et al.Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.
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