It is not advisable to apply fresh farmyard manure because
- A. its heat of decomposition may cause scorching of plants
- B. some microorganisms in the manure may die
- C. the manure may increase soil acidity
- D. the manure may increase soil alkalinity
Chemical weathering is fastest in
- A. cool weather
- B. hot weather
- C. high altitudes
- D. low altitudes
Which of the following rocks is not formed from pre-existing rocks?
- A. limestone
- B. granite
- C. shale
- D. marble
The following processes in soil formation are caused by biotic factors except
- A. bacterial decomposition of plants
- B. soil mixing and turning by earthworms
- C. burrowing of rodents
- D. soil disintegration by dehydration
The natural grasslands of West Africa are generally located in the
- A. rain forest
- B. guinea savanna
- C. mangroves
- D. equatorial belts
The use of land for agricultural purpose involves the following except
- A. livestock grazing
- B. fish farming
- C. road construction
- D. crop production
The practice of growth both food and forage crops simultaneously on the same piece of land is called
- A. pastoral farming
- B. ley farming
- C. crop rotation
- D. continuous cropping
Agricultural land use is negatively affected by
- A. type of soil
- B. climatic factors
- C. increase in population
- D. increase in soil micro-organisms
Which of the following statements about communal land tenure system is true?
- A. it gives the owner complete freedom on the land
- B. the land can be used as collateral for agricultural loans
- C. the land can be shared by the owner's children
- D. mechanical agriculture can be profitably practised
An advantage of commercial agriculture is that it
- A. requires small space
- B. requires skilled labour
- C. produces high returns
- D. involves low capital
The most important contribution of agriculture to mankind is the provision of
- A. shelter
- B. employment
- C. foreign exchange
- D. food