General Agriculture

Question 1

1Field capacity is the amount of water soil holds

Medium

A. after excess water has drained away B. when completely dry C. during rain only D. when flooded

Question 2

2Erosion that removes a thin, even layer of topsoil over a wide area is

Easy

A. rill erosion B. gully erosion C. sheet erosion D. wind erosion

Question 3

3Sheet erosion is the

Easy

A. movement of rocks B. removal of a thin, even layer of topsoil C. erosion by wind only D. formation of deep channels

Question 4

4The Universal Soil Loss Equation includes rainfall erosivity, soil erodibility, slope, cover and

Hard

A. support (conservation) practice B. labour cost C. crop price D. farmer age

Question 5

5Water held in soil that plants can use is called

Medium

A. available water B. groundwater only C. gravitational water D. hygroscopic water

Question 6

6Gully erosion forms

Easy

A. lakes B. thin layers C. sand dunes D. deep channels in the land

Question 7

7Splash erosion is caused by

Easy

A. rivers B. raindrops hitting bare soil C. wind D. animals

Question 8

8The two main agents of soil erosion are

Easy

A. water and wind B. earthworms and ants C. sunlight and shade D. manure and compost

Question 9

9Terracing is used on steep slopes to

Easy

A. remove soil B. reduce erosion by creating level steps C. increase runoff D. drain all water

Question 10

10The soil water most available to plant roots is

Medium

A. water vapour only B. gravitational water C. capillary water D. hygroscopic water