Which of the following properties of soil determines its water-holding capacity?
I. Texture
II. pH
III. Colour
IV. Structure

A. I and II only

B. I and IV only

C. II and III only

D. III and IV only

Which of the following statements about soil organisms is false?

A. soil pH will attack population of soil organisms

B. population of soil living organisms is increased with increase in soil organic matter

C. soil with good texture and structure cannot harbour soil microbes

D. soil temperature affects the activities of soil organisms

A detrimental effect of bush burning is that it

A. destroys soil organic matter

B. destroys weed seeds

C. sterilizes the soil

D. adds potash to the soil

The following crops will enrich the soil with nitrates except

A. calopogonium

B. pueraria

C. centrosema

D. exoriepus

Which of the following groups of rocks is formed as a result of volcanic eruption?

A. lomestone,basalt and shale

B. basalt,granite and pumice

C. sandstone,granite and quartzite

D. marble,gneiss and shale

The following fertilizers can be used to neutralize soil acidity except

A. wood ash

B. ammonium nitrate

C. limestone

D. calcium phosphosilicate

The following are advantages of sub-surface irrigation except that

A. it is suitable for soils with low water holding capacity

B. it can be used only for specific types of crops

C. the rate of evaporation is greatly reduced

D. it reduces the incidence of pests

Which of the following statement is a disadvantage of human power? it

A. controls other sources of farm power

B. brings about least damage

C. is easily available and controlled

D. has low output

The instrument which enables a surveyor to find the direction of a base line is

A. abney level

B. ranging pole

C. plumb bob

D. magnetic compass

Limitations of farm mechanization in West Africa do not include

A. land fragmentation

B. high capital investment

C. availability of spare parts

D. high level technical know-how