Waec Agricultural Science 1993 Past Questions and Answers

Question 6:

• WAEC 1993

Which of the following statement about crop rotation is not correct?

A. It involves alternating legumes with non-legumes
B. The use of legumes in rotation helps to maintain soil fertility
C. It encourages the build up of pests and diseases of crop
D. A good rotation system minimizes exposure of soil to erosion
E. It reduces infestation of land on rotation by weeds

Question 7:

• WAEC 1993

Which of the following is the best way to reduce surface run-off on farmlands?

A. Adding more clay to the soil
B. Providing adequate plant cover
C. Planting acrss the slope
D. Planting annual crops
E. Erecting strong fences round the farm

Question 8:

• WAEC 1993

In the process of recycling carbon in nature, carbondioxide is used by crops during

A. Respiration
B. Decomposition
C. Burning
D. Fruiting
E. Photosynthesis

Question 9:

• WAEC 1993

Which of the following is a day-neutral crop?

A. Millet
B. Maize
C. Coffee
D. Tomato
E. Cocoa

Question 10:

• WAEC 1993

During the processes of soil formation, the cracks or crevices that are first noticed on the rocks are normally caused by

A. Ice
B. Man
C. Wind
D. Temperature
E. Solution