Why should samples be taken from different parts of a field?

• A. To get more accurate results.
• B. To reduce sampling effort.
• C. To make analysis easier.
• D. To follow a fixed routine.

Answer: (A)

The main idea here is that fields are not perfectly uniform. Different parts can vary in soil fertility, moisture, texture, and previous crop impact. If you take a sample from only one spot, that sample might not represent the whole field—it could be unusually rich or poor. By taking samples from multiple parts and combining them, you average out these local differences, giving an estimate that better reflects the field as a whole. This reduces bias and makes the results more accurate for planning or decision-making. It’s not primarily about wasting effort or making analysis easier, and it’s not just following a routine—the point is to capture spatial variation to get a true picture of the field.