Soil conservation and water management exam #3

pH is the log of hydrogen ions (H⁺) in the soil solution.

False

The Ogallala aquifer formed millions of years ago from river sediment that originated with the erosion of the Rocky Mountains.

True

Mineral matter of a soil determines its texture.

True

The two most significant soil characteristics influencing water erosion are infiltration capacity and the structural stability of the soil.

True

Soil Structure describes the arrangement of sand, silt, clay and organic particles in a soil.

True

During transport water will sort material by which of the following?

Particle size

Which of the following equations used for estimating soil loss from pasture, range, forest, and cropland?

A=R*K*LS*C*P

Which of the following raindrops will deliver the most kinetic energy to the soil after reaching terminal velocity?

5 mm

What two changes need to be made to the RUSLE calculations when terraces are added to the field.

LS & P factors

One of the success stories from the Ogallala region occurred in Kansas with the LEMA group in Sheridan county, where residents voluntarily reduced their pumping by how much over a 5 year period?

20%

Removal of a thin layer of soil over an entire area is referred to as?

Sheet erosion

Which of the following is not a form of wind deposited sediment?

Bottom Deposits

What year was the Revised Universal Soil Loss Equation released by USDA-ARS?

1992

Which of the following types of erosion is best described as water percolating through soil moving soluble material?

Solution erosion

How far water travels down the slope before being intercepted/concentrated describes which of the following?

Slope length

Which of the following options best represents the P factor value for the following scenario. 

Assume no terraces, a strip cropping value of 0.85 and a contour planting value of 0.80.

0.68

How many acres are in a section?

640

What is the average recharge rate for many areas in the aquifer?

1 inch/year

Which of the following is not a process that elevates land?

Loess

Which of the following terms describes the arrangement of sand, silt, clay and organic particles?

Soil Structure