CCA Crop Management 3

Question 1

In integrated pest management (IPM), what is the correct order of pest management tactics by preference?

Accepted Answer

Prevention, cultural, biological, chemical

Answer

IPM prioritizes prevention first, then cultural controls, biological controls, and uses chemical controls as a last resort.

Question 2

Which soil water potential range is generally considered optimal for crop water uptake?

Accepted Answer

-0.03 to -1.5 MPa

Answer

Soil water potential between -0.03 MPa (field capacity) and -1.5 MPa (permanent wilting point) represents plant-available water.

Question 3

A soybean crop is showing nitrogen deficiency symptoms despite adequate soil nitrogen. Which condition could cause this?

Accepted Answer

Waterlogged soils reducing root function and nodule activity

Answer

Waterlogged soils kill rhizobium nodules and reduce root function, preventing nitrogen fixation even when soil nitrate is present.

Question 4

What is the recommended practice when planting corn after corn (continuous corn) to manage northern corn leaf blight?

Accepted Answer

Select resistant hybrids and bury residue with tillage

Answer

Using resistant hybrids and incorporating residue reduces northern corn leaf blight inoculum, since the pathogen overwinters in infected crop debris.

Question 5

Which seeding depth is generally recommended for small-seeded crops like alfalfa?

Accepted Answer

0.5 to 1.0 inch

Answer

Small-seeded crops like alfalfa have limited seed energy reserves and should be planted at 0.5–1.0 inch to ensure rapid emergence.

(CCA) Certified Crop Advisor Practice Test