GAP Conservation & Sustainability 2 — Questions and Answers
Question 1: Which cover crop practice best reduces soil erosion between growing seasons on a GAP-certified farm?
- Leaving fields completely bare
- Planting winter rye or cereal crops (Correct answer)
- Applying heavy gravel mulch
- Installing plastic ground covers permanently
Correct answer: Planting winter rye or cereal crops
Winter rye and other cereal cover crops establish quickly to hold soil in place and reduce erosion during the off-season.
Question 2: A farm's nutrient management plan should be based primarily on which of the following?
- Visual assessment of plant color
- Soil and tissue test results (Correct answer)
- Neighbor's fertilizer application rates
- Previous year's sales receipts
Correct answer: Soil and tissue test results
Soil and tissue test results provide the scientific basis for accurate nutrient applications, preventing over-application and reducing runoff risk.
Question 3: What is the primary purpose of a riparian buffer on a GAP-certified farm?
- Providing shade for farmworkers
- Filtering runoff before it enters waterways (Correct answer)
- Storing irrigation equipment
- Marking property boundaries
Correct answer: Filtering runoff before it enters waterways
Riparian buffers are vegetated strips along waterways that filter sediment, nutrients, and pathogens from agricultural runoff.
Question 4: Under GAP principles, integrated pest management (IPM) prioritizes which intervention first?
- Broad-spectrum chemical pesticide application
- Biological and cultural controls before chemicals (Correct answer)
- Fumigation of entire field areas
- Immediate harvest to avoid pest damage
Correct answer: Biological and cultural controls before chemicals
IPM follows a hierarchy that begins with prevention and biological controls, using chemical pesticides only when other methods are insufficient.
Question 5: Which water conservation technique is most efficient for irrigating vegetable crops under GAP standards?
- Flood irrigation
- Overhead sprinkler irrigation
- Drip or micro-irrigation (Correct answer)
- Furrow irrigation with open channels
Correct answer: Drip or micro-irrigation
Drip irrigation delivers water directly to the root zone, dramatically reducing evaporation and runoff compared to other methods.
Question 6: How should a GAP-certified farm handle empty pesticide containers to protect the environment?
- Burn them in the field
- Rinse three times and follow local disposal regulations (Correct answer)
- Bury them in a designated field corner
- Reuse them for storing other liquids
Correct answer: Rinse three times and follow local disposal regulations
Triple-rinsing pesticide containers removes residues, and following local regulations ensures safe disposal that prevents environmental contamination.
Question 7: Which sustainable practice helps maintain soil organic matter and reduce the need for synthetic fertilizers?
- Frequent deep tillage
- Incorporating crop residues and compost (Correct answer)
- Removing all plant debris after harvest
- Applying synthetic nitrogen annually at maximum rates
Correct answer: Incorporating crop residues and compost
Incorporating crop residues and compost builds organic matter, improves soil structure, and provides slow-release nutrients that reduce synthetic fertilizer dependence.
GAP Conservation & Sustainability 2
Which cover crop practice best reduces soil erosion between growing seasons on a GAP-certified farm?