What are agricultural chemicals?

Agricultural chemicals are primarily defined as substances that are used in farming to manage pests, enhance crop production, and improve overall agricultural output. This includes pesticides, which are substances used to control pests and diseases, herbicides designed to eliminate weeds, and fertilizers that provide essential nutrients to plants. All these products play a crucial role in modern agriculture by ensuring that crops are healthy and productive.

The other choices refer to specific types of products or alternative practices, but they do not encompass the broader category of agricultural chemicals as effectively as the correct answer. Natural fertilizers from plant materials represent a specific type of nutrient source, while non-toxic substances used in landscaping may not be applicable to agricultural settings specifically. Products that enhance the growth of organic crops refer to organic practices but do not capture the variety of chemicals utilized in agricultural settings, limiting the scope of the definition. Therefore, the correct answer highlights the comprehensive nature of agricultural chemicals, encompassing a wide array of substances essential for crop production and pest management.