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

Sandy loam

Answer

Silt loam

Answer

Loamy sand

Question 2

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

Accepted Answer

Soil erodibility

Answer

Rainfall erosivity

Answer

Slope length and steepness

Answer

Cover management

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

Atmospheric deposition

Answer

Stream bank erosion

Answer

Groundwater seepage

Question 4

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

Accepted Answer

Conventional tillage

Answer

No-till

Answer

Strip-till

Answer

Ridge-till

Question 5

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

Accepted Answer

Grassed waterway

Answer

Riparian buffer

Answer

Field windbreak

Answer

Filter strip

Question 6

Which soil organic matter fraction has the MOST immediate influence on nutrient cycling?

Accepted Answer

Labile (active) fraction

Answer

Humin

Answer

Humic acid

Answer

Fulvic acid

Question 7

When designing a terrace system, the vertical interval (VI) is primarily determined by:

Accepted Answer

Soil type and rainfall intensity

Answer

Crop rotation and tillage

Answer

Field width and aspect ratio

Answer

Drainage area and outlet capacity