The daily maintenance practice carried out on a disc harrow is

A. changing the disc

B. cleaning the soil off the disc

C. smearing the disc with oil

D. sharpening the edges of its scraper

Which of the following is an advantage of mechanization?

A. carrying out many farm operations with ease

B. displacing many farm workers

C. exposing soil to direct effect of sunlight and erosion

D. polluting the environment with industrial gases and wastes

Sexual propagation involves the use of

A. buds

B. seeds

C. cuttings

D. vines

The process of inducing root development on portions of stems still attached to the parent plant is known as

A. budding

B. grafting

C. layering

D. tillering

Which of the following crops requires shade in the early stages of its growth in the field?

A. coconut

B. banana

C. cotton

D. cocoa

Which of the following groups of crops is widely frown in areas with high rainfall?

A. cocoa,oilpalm,rubber and kola

B. millet,onoin,cotton and sorghum

C. coffee,cocoa,cotton and millet

D. rubber,onion,oil palm and cotton

An important forage crop in West Africa is

A. maize

B. rice

C. giant star grass

D. guinea corn

The most important reason for encouraging afforestation in the arid regions of West Africa is to

A. provide timber for building purposes

B. provide shelter for wildlife

C. produce medical plants

D. serve as wind break

The growing of both forest trees and arable crops simultaneously on the same piece of land is termed

A. mixed cropping

B. mixed farming

C. pastoral farming

D. taungya system

Which of the following plant diseases is not caused by fungi?

A. rice blast

B. maize streak

C. cassava leaf-spot

D. maize rust