Which of the following soil properties cannot be easily altered?

A. structure

B. consistency

C. texture

D. fertility

A soil with low pH value can be improved by the addition of

A. ammonium sulphate

B. calcium carbonate

C. sodium chloride

D. sodium nitrate

What is the percentage water content of a soil sample which weighed 180g when fresh and 120g when oven dried?

A. 66.7%

B. 60.0%

C. 15.0%

D. 33.3%

Nitrogen may be lost from the soil through the following processes except

A. crop removal

B. soil erosion

C. leaching

D. irrigation

Nitrogen deficiency in plants can lead to the following except

A. stunted growth

B. excessive growth

C. lower protein content of crop products

D. general yellowing of leaves

Which of the following is not a principal of crop rotation?

A. deep-rooted crops should be followed by shallow rooted crops

B. a period of fallow must be provided in the cours of the rotation

C. a leguminous crop should be included in the system

D. crops that can be attacked by the same pest should not follow each other

The most efficient irrigation method on large scale farms involve the use of

A. overhead irrigation facilities

B. flooding system

C. underground porous pipes

D. shadoof system

The farm machinery that does not have the heat engine is

A. tractor

B. bulldozer

C. mower

D. combin drill

What is the main use of a gunter's cabin?

A. taking measurement of distance

B. determining the depth of soil moisture

C. calculating the slope of the land

D. restraining bulls

The main reason why the disc plough is preferred over the mouldboard plough for use in heavy soils is that

A. the scraper removes any adhering mud

B. it is lighter and so gets stuck easily

C. its frame is made of stainles steel

D. it buries weeds mor effectively