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 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

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

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

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

Drainage types include the following except

A. shadoof

B. open

C. channel

D. surface

E. underground

Energy for photosynthesis in crops is provided by

A. man

B. animal

C. wind

D. sun

E. water

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

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

The agent of controlled pollination in crops is

A. water

B. light

C. moth

D. butterfly

E. man