The objective of crops improvement programmes is to produce the following except
- A. crop types with improved taste and processing
- B. disease-resistance crops
- C. high-yielding crops
- D. crops adapted to adverse enviromental conditions
- E. crops resistant to all pests
Which of the following crops is not correctly grouped with its industrial product?
- A. cocoa-chocolate
- B. rubber-boots
- C. coconut-oil
- D. cotton-textile
- E. orange-margarine
The annual burning of forest areas encourages
- A. afforestation
- B. deforestation
- C. regeneration
- D. selective explotation
- E. taungya farming
I. spreading and perennial plant with long and rapid growing stems. II. height of plant about 1.2m III. resistance to dry weather. Which of the following pasture grasses has the description given above?
- A. northern gamba grass
- B. bahama grass
- C. guinea grass
- D. elephant grass
- E. gaint star grass
The commonest method of vegetative propagation is by
- A. layering
- B. budding
- C. cutting
- D. grafting
- E. tillering
Which of the following crops cannot be easily improved by cross-breeding?
- A. groundnut
- B. cowpea
- C. oil palm
- D. maize
- E. yam
The causal organism of damping-oil disease of okra is a
- A. bacterium
- B. virus
- C. nematode
- D. aphid
- E. fungus
Which of the following crops does not require nursery?
- A. rice
- B. tobacco
- C. tomato
- D. oil palm
- E. maize
Which of the following is not a reason for the government to encourage the planting of trees
- A. controlling erosion
- B. increasing soil fertility
- C. preventing desert encroachment
- D. reducing effects of environmental pollution
- E. increasing output of mineral oil
Which of the following factors does not affect the distribution of pasture grasses?
- A. type of species
- B. temperature
- C. soil
- D. pests and diseases
- E. rainfall
If the ginning percentage of the samaru variety of cotton is 35, what will be the amount of raw cotton obtained from a 6 hectare farm with a yield of 330 kg seed cotton per hectare?
- A. 46 kg
- B. 96.3 kg
- C. 114 kg
- D. 693 kg
- E. 6930 kg
Most crop plants do not survive in water-logged soils because
- A. the dissolved nutrients are too diluted for crop plants
- B. the plants will not photosynthesize
- C. their leaves are turgid for respiration
- D. their physiological processes will be increased
- E. oxygen has been displaced to its deficiency for crops
Plant micro-nutrients include the following except
- A. sulphur
- B. copper
- C. iron
- D. zinc
- E. chlorine
Which of the following factors does not bring about soil formation?
- A. climate
- B. time
- C. parent material
- D. sunshine
- E. topography
A soil with particles of less than 0.002mm in diameter is referred to as
- A. clay
- B. silt
- C. sand
- D. gravel
- E. humus
Fertilizers that usually contain one nutrient which can be used directly by plants are commonly called
- A. organic fertilizers
- B. mixed fertilizers
- C. inorganic fertilizers
- D. compound fertilizers
- E. straight fertilizers
The different types of soil are determined by the relative amounts of each of the following components except
- A. rocks
- B. air
- C. water
- D. minerals
- E. organic matter
Which of the following does not occur as a result of poor drained soil?
- A. mottling near the top
- B. decrease in rooting depth
- C. change in colour of the subsoil
- D. decrease in organic matter content
- E. increase in oxygen level of the soil
What happens to the nitrogen and sulphur contents of vegetation when burning is used as a means of lans clearing? They
- A. are released by burning and lost as gases
- B. remain in ash as nitrates and sulphates
- C. raise the PH of an acid soil
- D. are released into the soil thus increasing the nutrients of the soil
- E. activate the soil microbes afetr burning
the nutrient content of soil may be influenced by the following except
- A. harrowing
- B. topography
- C. cropping
- D. fallowing
- E. grazing
The most important soil micro-organisms concerned with decay and nutrients-recycling are
- A. bacteria and fungi
- B. fungi and algea
- C. alga and actinomyces
- D. actinomyces and bacteria
- E. bacteria and algea