Continuous soil tillage could lead to
- A. increased infiltration of water .
- B. reduced run-off
- C. break down of soil structure
- D. improved soil texture
Which of the following pairs of farming systems uses bush fallowing?
- A. crop rotation and land rotation
- B. shifting cultivation and land rotation
- C. land rotation and mixed farming
- D. crop rotation and monoculture
A major disadvantage of monoculture is that
- A. soil texture is destroyed
- B. soil microbes are destroyed
- C. diseases and pests build up
- D. farms cannot be mechanized
A mass of decayed plant and animal wastes processed in pits is referred to as
- A. green manure
- B. farmyard manure
- C. compost manure
- D. inorganic manure
What is the function of nitrosomonas bacteria in the nitrogen cycle?
- A. Ammonification
- B. Nitrification
- C. Denitrification
- D. Nitrogen fixation
Nutrient replenishment in soil can be enhanced by
- A. crop removal
- B. leaching
- C. erosion
- D. crop rotation
The major factor affecting distribution of crops in West Africa is
- A. climate
- B. soil
- C. topography
- D. disease
Which of the following is not an effect of over-graing on soil?
- A. Improvement of soil structure
- B. soil compaction
- C. exposure of soil to erosion
- D. depletion of soil nutrients
The practice of growing different crops in sequence on a piece of land is known as
- A. rotational grazing
- B. monoculture
- C. crop rotation
- D. mixed farming
The method of surface irrigation widely used in rice fields is
- A. basin irrigation
- B. wild flooding
- C. furrow irrigation
- D. border strip
Wind can be beneficial to crop production because it
- A. aids weed seeds dispersal
- B. aids pollination of crops
- C. causes lodging of crops
- D. causes rapid drying of wet soils
It is important to clean and grease plough discs after use to
- A. prevent rusting
- B. sharpen the discs
- C. reduce friction
- D. reduce the lifespan
The appropriate farm tool for lifting tomato seedlings for transplanting is the
- A. dibber
- B. hoe
- C. hand trowel
- D. hand fork
The machine used for removing seeds from maize cobs is called a
- A. mill
- B. decorticator
- C. winnower
- D. sheller
The function of the seed -tube of a seed drill is to
- A. transport seeds from the metering device to the furrow opener
- B. control the rate of placement of seeds in the soil
- C. cover seeds placed in the soil
- D. open the soil for seed placement
The agricultural sector in West Africa is plagued with poverty because
- A. farmers belong to cooperative societies
- B. yields obtained per annum are relatively low
- C. farmers have access to credit facilities
- D. the weather is highly predictable
The most common method of acquiring land in West Africa is by
- A. mortgage
- B. communal ownership
- C. leasehold
- D. inheritance
Commercial agriculture is characterised by
- A. use of machines
- B. small farm holdings
- C. low capital investment
- D. little research activity