Which of the following statement is not true about waterlogged soils?

A. such soils are heavily leached

B. dentrifying bacteria are more active in such soil than nitrifying bacteria

C. nitrosomonas yield bet in such soils

D. soil temperature is usually low

Which of the following crops should be planted on a piece of land that has been repeatedly cropped with maize?

A. guinea corn

B. millet

C. rice

D. cowpea

Sources of nitrogen to the soil include the following except

A. lightening

B. urea

C. blue-green algae

D. residues of burning activities

Which of the following statements about bush burning is false?

A. it releases mineral nutrients bound in plant tissues

B. it encourages the growth of fresh grasses

C. the heat generated destroys pests

D. the heat generated increases the population of soil organisms

A farmer applied NPK 15:11:8 at planting. What is the percentage of potassium in the fertilizer?

A. 23.53%

B. 32.35%

C. 33.33%

D. 44.12%

The following equipment can be used for irrigation except

A. bucket

B. watering can

C. knapsack sprayer

D. siphon tube

Excessive drainage of soil water can be checked by the addition of adequate quantities of

A. N.P.K 15 - 15 - 15

B. sulphate of ammonia

C. single superphosphate

D. compost manure

Considering all costs, the cheapest source of energy for domestic use is

A. eloectricity

B. sunlight

C. biogas

D. water

The implement used for pulverizing the soil is the

A. planter

B. ridger

C. horrow

D. plough

An incubator is important in supplying

A. heat for day-old chicks

B. heat for embryo develoment

C. light for cadling eggs

D. feed to chicks