CCA Soil and Water Conservation 2

Question 1

Which soil texture has the highest water-holding capacity per unit volume?

Accepted Answer

Clay loam

Answer

Clay loam holds the most water per unit volume due to its high proportion of fine clay particles with large surface area.

Question 2

The Universal Soil Loss Equation (USLE) factor 'K' represents:

Accepted Answer

Soil erodibility

Answer

The K factor in USLE represents soil erodibility, reflecting how susceptible a soil is to detachment and transport by rainfall and runoff.

Question 3

A farmer observes high nitrate concentrations in a nearby stream following heavy rain. The MOST likely source is:

Accepted Answer

Subsurface tile drain discharge

Answer

Subsurface tile drains rapidly transport dissolved nitrate from the soil profile to surface waters, especially after rainfall events.

Question 4

Which tillage system typically results in the LEAST surface residue after planting?

Accepted Answer

Conventional tillage

Answer

Conventional tillage inverts the soil with a moldboard plow, burying most surface residue and leaving the surface bare.

Question 5

Permanent vegetation established in a concentrated flow area to slow runoff and trap sediment is called a:

Accepted Answer

Grassed waterway

Answer

A grassed waterway is a shaped, vegetated channel designed to convey concentrated runoff safely and reduce erosion and sediment delivery.

(CCA) Certified Crop Advisor Practice Test