Agronomy Basic 5

Question 1

What is 'salinization' in agricultural soils?

Accepted Answer

The accumulation of soluble salts to harmful levels in soil

Answer

Salinization occurs when evaporation leaves behind soluble salts that accumulate to concentrations toxic to most crops.

Question 2

Which practice is used to reduce soil erosion on sloped farmland by plowing across the slope?

Accepted Answer

Contour farming

Answer

Contour farming involves tilling and planting across the slope rather than up and down, slowing runoff and reducing erosion.

Question 3

What does 'germination rate' measure in seed quality testing?

Accepted Answer

The percentage of seeds that sprout under standard conditions

Answer

Germination rate is the percentage of seeds in a sample that successfully sprout under controlled, optimal conditions.

Question 4

What is the primary function of potassium (K) in crop plants?

Accepted Answer

Regulating stomatal opening and improving disease resistance

Answer

Potassium regulates stomata to control water use, activates enzymes, and strengthens cell walls, improving overall stress and disease resistance.

Question 5

Which of the following is an example of a C4 crop plant?

Accepted Answer

Corn (maize)

Answer

Corn (maize) is a C4 plant, using a more efficient photosynthetic pathway that reduces photorespiration and performs well in hot, sunny conditions.

Agronomy Practice Test