The most important pests of vegetable crops are
- A. rodents
- B. birds
- C. nematodes
- D. insects
- E. reptiles
The forest trees growing in the Sudan savanna zone of Nigeria include the following except
- A. mahogany
- B. baobab
- C. shea butter
- D. neem
- E. eucalyptus
Which of the following is not a reason for converting a piece of land into a forest reserve?
- A. low population pressure
- B. poor soil fertility
- C. disputed ownership of land
- D. prevention of natural hazards
- E. improvment of micro-climatic conditions of the environment
The tree species widely used in afforestation programme is
- A. neem
- B. teak
- C. oil palm
- D. ebony
- E. rubber
Reforestation is the
- A. organised planting of trees in areas from which forest trees have been removed
- B. establishment of forests in areas where there are previously none
- C. development of young treees to replace old mature trees
- D. planting of forest trees on an unproductive land
- E. cultivation of forest trees for boundary demarcation
Which of the following is a pasture grass?
- A. stylozanthes gracilis
- B. centrosema pubescens
- C. pueraria phaseloides
- D. cynodon dactylon
- E. calapogonium mucunoides
Which of the following is not a characteristic of a good pasture?
- A. high quality grasses and legumes
- B. high leaf to stem ratio
- C. drought resistance
- D. ability to withstand trampling
- E. slow growth
Common pasture grasses include the following except
- A. guinea grass
- B. carpet grass
- C. elephant grass
- D. gamba grass
- E. spear grass
Milling of rice is usually done
- A. after parboiling and drying
- B. before parboiling and drying
- C. before parboiling and winnowing
- D. after parboiling and drying
- E. after winnowing and parboiling
The agent of controlled pollination in crops is
- A. water
- B. light
- C. moth
- D. butterfly
- E. man
Cassava is cultivated in many ecological zones because of its
- A. industrial and domestic uses
- B. tolerance to low rainfall and soil fertility
- C. early maturity and weed suppression
- D. resistance to mosaic diseases and pest attacks
- E. low production costs
Cassava is normally planted at a spacing of about
- A. 0.1 m x 0.5 m
- B. 0.75 m x 1.0 m
- C. 2.0 m x 3.5 m
- D. 3.0 m x 3.0 m
- E. 4.0 m x 5.5 m
Energy for photosynthesis in crops is provided by
- A. man
- B. animal
- C. wind
- D. sun
- E. water
Drainage types include the following except
- A. shadoof
- B. open
- C. channel
- D. surface
- E. underground
A farm practice which assists in maintaining the structure and fertility of soil and reduction in risk of the sun infestation is
- A. bush burning
- B. organic manuring
- C. crop rotation
- D. mulching
- E. fertilizer application
Effects of overgrazing on soil include the following except
- A. exposure of soil to erosion
- B. depletion of soil nutrients
- C. soil compaction
- D. improvement of soil structure
- E. exposure of soil to direct rays of the sun
The following crops can be grown as cover crops except
- A. pueraria phaseoloides
- B. stylozanthes gracillis
- C. centrosema pubescens
- D. nicotiana tabacum
- E. calopogonium mucunoides
Which of the following is not a function of organic matter in the soil?
- A. conserving soil water
- B. preventing soil erosion
- C. preventing leaching in soil
- D. inhibiting seed germination
- E. stabilising the structure of the soil
Crops grown in nitrogen deficient soil show the following characteristics except
- A. poor setting of fruit
- B. stunted growth
- C. chlorosis in growing crops
- D. yellowing of lower leaves
- E. timely ripening of fruits
Which of the following is a soil micro-nutrient?
- A. magnesium
- B. potassium
- C. calsium
- D. iron
- E. phosphorus
The amount of air and water in the soil is mostly affected by the
- A. location of the soil
- B. amount of annual rainfall
- C. chemical compostion of the soil
- D. living organisms in the soil
- E. structure of the soil