CHT Soil Science & Fertilization 2

Question 1

What is the purpose of a soil percolation test?

Accepted Answer

Assess drainage rate

Answer

A percolation test measures how quickly water drains through soil, helping determine suitability for plants and irrigation design.

Question 2

Micronutrient deficiencies often become apparent first in:

Accepted Answer

New growth (young leaves)

Answer

Micronutrients like iron and manganese are immobile in plants, so deficiency symptoms appear first in new, young growth.

Question 3

Which amendment is most effective for raising soil pH?

Accepted Answer

Agricultural lime

Answer

Agricultural lime (calcium carbonate) neutralizes soil acidity and raises pH when incorporated into the soil.

Question 4

Phosphorus application is best timed to:

Accepted Answer

Be incorporated before planting

Answer

Phosphorus is relatively immobile in soil and should be incorporated before planting so roots can access it at the root zone.

Question 5

What does a green or blue-green soil crust indicate?

Accepted Answer

Algae or cyanobacterial growth due to excess moisture

Answer

A green or blue-green surface crust typically indicates algae or cyanobacteria thriving in overly wet, compacted, or waterlogged conditions.

CHT - Certified Horticultural Technician Practice Test