CCA Crop Management 4

Question 1

What is the primary function of the endosperm in a cereal grain?

Accepted Answer

Stores carbohydrates and proteins as energy for germination

Answer

The endosperm stores starch, proteins, and oils that provide energy and nutrients to the germinating embryo before photosynthesis begins.

Question 2

A wheat field shows patches of purple-colored plants with delayed maturity. Phosphorus deficiency is suspected. What soil condition most likely caused this?

Accepted Answer

Low soil temperature reducing phosphorus uptake by roots

Answer

Low soil temperatures reduce root metabolic activity and phosphorus diffusion rates, causing temporary deficiency even when soil phosphorus levels are adequate.

Question 3

Which pest scouting method involves counting insects per unit area at multiple random locations?

Accepted Answer

Systematic random sampling

Answer

Systematic random sampling involves taking counts at predetermined random locations throughout the field to estimate pest population density.

Question 4

In the context of crop rotation, what is the main agronomic benefit of including a legume in the rotation?

Accepted Answer

Legumes fix atmospheric nitrogen, reducing fertilizer needs for the following crop

Answer

Legumes hosting rhizobium bacteria fix atmospheric nitrogen into plant-available forms, reducing nitrogen fertilizer requirements for subsequent crops.

Question 5

What is the purpose of a pre-emergence herbicide application?

Accepted Answer

Create a chemical barrier in the soil to prevent weed seed germination or emergence

Answer

Pre-emergence herbicides form a treated zone in the soil that prevents germinating weed seedlings from emerging, rather than killing established weeds.

(CCA) Certified Crop Advisor Practice Test

(CCA) Certified Crop Advisor Practice Test

CCA Crop Management 4