Final answer:
The nonprofit organization should encourage planting of crops in rows perpendicular to the hill slope to promote soil quality. Organic farming practices and no-till methods should be incorporated to protect soil health. These sustainable strategies help to maintain the ecological balance and enhance long-term agricultural productivity.
Step-by-step explanation:
The nonprofit organization should implement sustainable farming practices that protect soil quality and promote soil fertility. Therefore, the strategy they should implement is to encourage planting of crops in rows perpendicular to the hill slope (II only). This practice helps reduce soil erosion by water run-off. Utilizing pesticides generously (I) is not sustainable, as it can harm beneficial soil organisms and lead to pest resistance, while plowing deeply (III) can disrupt soil structure, reduce organic matter, and increase erosion, thereby negating efforts to improve soil quality.
Incorporating organic farming practices such as minimal tillage or no tillage methods can prevent soil compaction, protect soil organisms, and reduce soil erosion while also avoiding the release of greenhouse gases. Shifting cultivation, or letting land lie fallow, can also regenerate soil nutrients. Extensive cultivation, as demonstrated in horticulture, involves rotating crops to different plots to allow soil recovery. These methods align with the goals of increasing biodiversity, keeping natural nutrient cycles intact, and reducing the use of unnecessary inputs like pesticides and heavy machinery.