Concept:Soil conservation means protecting soil from erosion, nutrient loss, and degradation so that it remains productive for farming.
Explanation:Cover cropping is the practice of planting grasses, legumes, or other plants to keep the soil surface covered.
These plants reduce the impact of raindrops on bare soil.
They also hold soil particles together with their roots, preventing erosion by water and wind.
Cover crops add organic matter to the soil and improve soil structure and fertility.
Bush fallowing is a way of allowing land to rest and regain fertility, but it is not considered a direct soil conservation technique.
Monoculture means growing the same crop repeatedly, which can deplete soil nutrients and increase erosion risk.
Shifting cultivation is a traditional farming system where farmers move to new land after soil fertility declines, rather than actively conserving the soil.
Hence, among the given options, only cover cropping is a direct method of soil conservation.
Answer:D. cover cropping