The United Nations defines sustainable land management (SLM) as "the use of land resources, including soils, water, animals and
plants, for the production of goods to meet changing human needs, while simultaneously ensuring the long-term productive potential
of these resources and the maintenance of their environmental functions". In many countries around the world, especially in Africa
and the Middle-East, farmed land is rainfed rather than irrigated. In these semi-arid regions, depending on land management
practices, much of the rainfall on agricultural land is lost as non productive evaporation from the soil surface. The water challenge in
these areas is to enhance low crop yields by improving water availability for plan wth Minimum tillage and mulch results in twice
as much available water as does deep tillage. Hypothesize as to how this strategy meets the SLM criteria: ensures the long-term
productive potential of these resources and the maintenance of their environmental functions. All BUT ONE could apply
A. Covering the exposed soil results in less soil erosion over time
B. There is less water lost due to evaporation and therefore more available to
plants
C. The mulch covering the soil gradually decomposes to improve soil fertility
for future planting
D. Minimum tiltage and mulch requires less fossil fuels in preparing the soil,
deducing both fossil fuel use and carbon dioxide emissions.