The farm practices that does not have a very harmful effect on the soil is
Flooding
Crop rotation
Over grazing
Bush burning
Correct answer is B
Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons.
Which of the following nutrient element is a micro-nutrient?
Calcium
Iron
Manganese
Boron
Correct answer is A
Calcium is a macro nutrient [nutrients required by plant in large quantity, while the rest are micro nutrients [nutrients required in small quantity].
A crop not requiring more than 750mm annual rainfall is most suitable for cultivation in
Rain forest
Sahel savanna
Sudan savanna
Guinea savanna
Correct answer is B
Sahel savanna plants/crops requires between 600 - 900mm of rainfall.
One of the symptoms of vitamin deficiency diseases in livestock includes except
Improved fertility
Loss of appetite
Scurvy
Rickets
Correct answer is A
Deficiency in vitamin cannot improve fertility rather it decreases it, leads to loss of appetite, scurvy and rickets.
Which one of these is not a factor that affect change in supply of agricultural produce?
Technology
Changes in the cost of production
Changes in prices of commodity
Fixed cost
Correct answer is D
Fixed cost does not affect the supply of agricultural produce.