The principal involved in crop production include the following, I. controlling of diseases, weed and pests, II. maintaining the quality of agricultural pro...

When making agricultural policies, the government aims to address all the principal factors involved in crop production. This means that the government seeks to develop policies that encompass all four of the options given, namely: controlling diseases, weeds, and pests; maintaining the quality of agricultural produce; conserving and preserving natural resources; and controlling soil erosion. By developing policies that address all four of these factors, the government hopes to create an environment in which farmers can produce high-quality crops efficiently and sustainably, while also protecting the natural resources upon which agriculture depends. Therefore, the combination of principles that the government aims at when making agricultural policies is I, II, III, and IV - controlling diseases, weeds, and pests; maintaining the quality of agricultural produce; conserving and preserving natural resources; and controlling soil erosion.