Which of the following types of soil contains particles of diameter between 0.02 mm and 2.o mm?
Sand
Salt
Gravel
Clay
Stone
Correct answer is A
No explanation has been provided for this answer.
Which of the following is not associated with surface irrigation?
Natural flooding
Check flooding
Sprinkler irrigation
Mole drains
Tiles
Correct answer is D
No explanation has been provided for this answer.
Which of the following farm practices can prevent excessive evaporation from soil surfaces?
Liming
Mulching
Weeding
Harrowing
Ploughing
Correct answer is B
No explanation has been provided for this answer.
Magnesium
Zinc
Nitrogen
Copper
Phosphorus
Correct answer is E
No explanation has been provided for this answer.
In which layer of the soil profile does most biological activity occur?
Parent material
D-horizon
C-horizon
B-horizon
A-horizon
Correct answer is E
No explanation has been provided for this answer.