In which of the soil layer does most biological activity ...
In which of the soil layer does most biological activity occur?
B - horizon
C - horizon
D - horizon
A - horizon
Correct answer is D
A - horizon is the top layer of the soil horizon, it contains decomposed organic matter which is necessary for plant growth and also microorganisms.
Forest regulations are formulated in order to encourage ...
An illegal method of harvesting fish is by the sue of ...
The following are climatic conditions affecting agricultural production except ...
Plant micro-nutrients include the following except ...
What are the primary benefits of agricultural extension services? ...
Tropical crops grow best within the temperature range of ...
The branch of crop production which is normally concerned with crop improvement is ...
Root knot of tomato is caused by a ...
Which of the following refers to a farm accounting entry? ...