The correct answer is D. productivity.
Manuring is the application of manure to soil to improve its fertility. Manure is a natural fertilizer that contains nutrients that plants need to grow. When manure is applied to soil, it helps to improve the soil’s structure, water retention, and nutrient availability. This can lead to increased crop yields and improved crop quality.
A. Income is not directly affected by manuring. However, increased crop yields can lead to increased income for farmers.
B. Fertility is the ability of soil to support plant growth. Manuring can improve soil fertility by adding nutrients and organic matter to the soil.
C. Profitability is the amount of money that a business makes after all expenses are paid. Manuring can increase profitability by increasing crop yields and reducing the need for other inputs, such as pesticides and herbicides.
D. Productivity is the amount of output that is produced from a given input. Manuring can increase productivity by increasing crop yields.