When individual crop with desired characteristic mostly favoured by the environment are chosen for breeding this type of breeding is referred to as
- A. introduction
- B. hybridization
- C. line-breeding
- D. selection
- E. cross-breeding
Which of the following diseases of crops causes stunting in maize?
- A. blast
- B. rosette
- C. blight
- D. streak
- E. smut
Jute, cotton and sisal are
- A. oil crops
- B. parental crops
- C. fibre crops
- D. vegetable crops
- E. ornamental
The most suitable soil for cultivating yam is
- A. sand
- B. silt
- C. sandy clay
- D. clay
- E. clay loam
The study and management of forests and forest resources is known as
- A. agro forestry
- B. taungya
- C. wildlife
- D. forestry
- E. silviculture
Which of the following is not a reason for preferring rotational grazing to continuous grazing?
- A. avoiding build-up of livestock pests
- B. obtaining uniform quality of herbage
- C. encouraging persistence of desired species
- D. breaking the life-cycle of some pests
- E. avoiding excessive amount of organic manuring
Which of the following factors has the greatest influence on crop production?
- A. light
- B. vegetation
- C. water
- D. air movement
- E. pressure
Flood irrigation is mainly used in
- A. arid area
- B. subtropical area
- C. tropical area
- D. sloppy area
- E. savanna area
Crop rotation has the following effects on the soil except
- A. maintenance of soil fertility
- B. reducing concentration of soil pests
- C. improving soil structure
- D. reducing soil erosion
- E. predisposing soil to leaching
Which of the following will be responsible for the poor yield of fertile soil in a high rainfall area?
- A. leaching of soil nutrients
- B. very low pH value of land
- C. lack of soil microbes
- D. high alkalinity of soil
- E. erosion of the soil
A soil with pH2 can be described as
- A. moderately acidic
- B. moderatly alkaline
- C. neutral
- D. highly alkaline
- E. highly acidic
A metamorphic limestone is
- A. marble
- B. gneiss
- C. quartzite
- D. schist
- E. shale
Which of the following is not an edaphic factor affecting agricultural production?
- A. soil PH
- B. soil texture
- C. predators
- D. soil structure
- E. soil type
In underground drainage
- A. ditches are constructed to remove excess water
- B. furrows in which water collects are made
- C. water seeps into the tiles to reach an outlet where water is disposed
- D. water is pumped through perforated pipes to crops
- E. ditches are dug from a source of water to the farmland
Which of the following is not an effect of grazing on the soil?
- A. enrichment of soil with animal dung
- B. exposure of soil to erosion
- C. destruction of soil structure
- D. increase in soil acidity
- E. reduced rate of water percolation
Inhibition of root and bark development, fruiting and seed formation in crops is due to the deficiency of
- A. phosphorus
- B. boron
- C. nitrogen
- D. chlorine
- E. molybdenum
The factors affecting formation of soil include the following except
- A. organisms
- B. time
- C. topography
- D. catena
- E. climate
The most common soil mineral found in all crystalline rocks and a main constituent of granite and sandstone is
- A. biotite
- B. quartz
- C. mica
- D. granite
- E. basalt
Which of the following will retain the greatest amount of water?
- A. clay
- B. loam
- C. sandy loam
- D. sand
- E. silt
A characteristic feature of subsistence agriculture is
- A. supply of labour by farm families
- B. wholesale of farm harvest
- C. purchasing of seeds for planting
- D. dieases control
The newly introduced government agricultural programme in Nigeria is
- A. operation feed the nation
- B. green revolution
- C. agricultural development projects
- D. agricultural insurance scheme
- E. farm settlement