Question 461:

• WAEC 1992

The side effects of the various preventive and control measures of pests and diseases of crops include the following except

A. Environmental pollution
B. Poisoning of wildlife
C. Disruption of the ecosystem
D. Improvement in the quality of farm produce
E. Exposure of the farmer to health hazards

Question 462:

• WAEC 1992

Which of the following parts of plants are normally used for vegetative propagation?

A. Stem, root and seed
B. Stem, root and flower
C. Fruit, leaf and root
D. Leaf, flower and stem
E. Stem, root and leaf

Question 463:

• WAEC 1992

The correct sequence in preparing new land for cropping is usually

A. Stumping, laying out of farm, ridging and tiling
B. Laying out of farm, ridging, stumping and tilling
C. Tilling, stumping, laying out of farm
D. Ridging, laying out of farm, tilling and stumping
E. Laying out of farm, stumping, tilling and ridging.

Question 464:

• WAEC 1992

Which of the following methods would quickly provide a large harvest of oranges from a tree with desirable qualities?

A. Planting the seeds of the plant with the desirable qualities
B. Crossing orange trees with those of desirable qualities
C. Applying special fertilizer to the other citrus trees
D. Grafting a branch from the tree with desirable qualities to the stock of other citrus trees
E. Planting the stem cuttings of the orange tree with desirable qualities

Question 465:

• WAEC 1992

Which of the following is not an aim of improving crops?

A. Producing crops which are resistant to diseases and pests
B. Producing crops which are adapted to adverse weather conditions
C. Increasing yield by planting high yielding and vigorous varieties
D. Improving the qualities of farm produce
E. Improving mechanical method of harvesting crops.