GAP Field Survey & Data Collection 3

Question 1

Which soil sampling strategy provides the MOST representative composite sample for a 40-acre field with variable soil texture?

Accepted Answer

Grid sampling with cores taken every 2.5 acres

Answer

Grid sampling distributes core locations systematically across the field, capturing spatial variability in soil texture that random or single-point sampling would miss.

Question 2

When a field scout records pest pressure data using a standardized scouting form, what does the term 'economic threshold' help determine?

Accepted Answer

Whether pest populations are high enough to justify intervention

Answer

The economic threshold is the pest population level at which the cost of intervention is justified by the yield loss it prevents, guiding treatment decisions.

Question 3

In GAP field survey documentation, what does a 'buffer zone assessment' primarily evaluate?

Accepted Answer

Potential contamination sources adjacent to the production area

Answer

A buffer zone assessment identifies and documents potential contamination sources—such as livestock areas, roads, or water features—adjacent to the production area.

Question 4

A field data collection protocol requires workers to record 'field conditions at time of survey.' Which set of data BEST satisfies this requirement?

Accepted Answer

Date, time, weather conditions, and worker identification

Answer

Date, time, weather conditions, and worker ID establish when the survey occurred, under what conditions, and who is accountable—all required elements.

Question 5

When conducting a topographic survey to assess flooding risk, which data point is MOST useful for predicting where water will pool after a heavy rain event?

Accepted Answer

Elevation contour data identifying low-lying depressions

Answer

Elevation contour data directly identifies depressions where water collects, which is the primary predictor of flood pooling and associated contamination risk.

(GAP) Good Agricultural Practices Certified Practice Test

(GAP) Good Agricultural Practices Certified Practice Test

GAP Field Survey & Data Collection 3