CKA CERTIFIED KINGDOM ADVISOR COMPREHENSIVE EXAM SCRIPT COMPLETE QUESTIONS VERIFIED SOLUTIONS

CKA CERTIFIED KINGDOM ADVISOR COMPREHENSIVE EXAM SCRIPT COMPLETE
QUESTIONS VERIFIED SOLUTIONS
CKA Certified Kingdom Advisor Practice EXAM
2026/2027 Comprehensive EXAM Questions and
Answers Verified Solutions Latest Update

Question:
How might weeds that emerge after the critical period affect crops?

Answer:
Produce a significant amount of weed seed



Question:
Micronutrients are ________ deficient in Iowa soils.

Answer:
Rarely



Question:
Corn leaf initiation ends between what growth stages?

Answer:
V4 - V6



Question:
The discovery of small nodules with pink to red centers on soybean roots would be a sign of:

Answer:
Proper nitrogen fixation for the soybean plant



Question:
Physiological maturity occurs approximately ______ days after silking.

,Answer:
64 - 66



Question:
During which reproductive stage will the kernel be filled with clear liquid?

Answer:
R2



Question:
Most pathogens survive Iowa's harsh winters in:

Answer:
Plant Residue



Question:
Which of the following is not a competitive trait of insects?

Answer:
Very specific diet choice



Question:
What is the disease cycle?

Answer:
Sequence of events in the development, reproduction, and survival of a plant disease



Question:
Which of the following herbicides has a much longer half-life when pH is greater than 7?

Answer:

,Chlorimuron



Question:
Which of the following is an example of a signal word?

Answer:
CAUTION, WARNING, DANGER



Question:
Herbicides are often more persistent under _____ conditions.

Answer:
Dry



Question:
Which of the following is a way that erosion reduces soil productivity?

Answer:
Loss of top soil, nutrient loss to waterways, potential damage to plant stands



Question:
The soil exchange complex is:

Answer:
Negatively Charged



Question:
Which soil component will have the most surface area?

Answer:
Clay

, Question:
The genetic makeup of soybean is most related to development of which nutrient deficiency
symptom.

Answer:
Iron



Question:
What soil usually will have the greatest total percent pore space?

Answer:
Clay



Question:
Which of the following Kd values would belong to a herbicide that would be least tightly bound to
soil?

Answer:
Kd = 10



Question:
At what stage does the milk line become visible in the kernels?

Answer:
Dent stage



Question:
Active acidity is the hydrogen ions:

Answer:
In soil water