Agronomy Degree Practice Exam

What is the primary purpose of tillage in agriculture?

1. Weed control

2. Soil aeration

3. Soil preparation for planting

4. Nutrient application

The correct answer is: Soil preparation for planting

The primary purpose of tillage in agriculture is soil preparation for planting. Tillage involves the mechanical manipulation of soil to create an optimal seedbed that promotes effective seed germination and growth. This process may include breaking up compacted soil, incorporating organic matter, and leveling the soil surface. By preparing the soil adequately, tillage enhances its physical structure, improves water infiltration, and increases the availability of nutrients, ultimately leading to better crop yields. While weed control, soil aeration, and nutrient application are important aspects of agricultural practices, they are often considered secondary benefits of tillage. For example, tillage can disrupt weed growth by uprooting existing weeds and burying seeds, thus helping control their presence. Additionally, tillage can create air pockets in the soil, improving its aeration, which is vital for root respiration. However, the foundational role of tillage lies in preparing the soil specifically for planting, making it the most accurate answer in this context.