Which of the following types of soil contains particles of diameter between 0.02 mm and 2.o mm?

A. sand

B. silt

C. gravel

D. clay

E. stone

A farmer cultivating leafy vegetables will require fertilizers with a relatively high content of

A. calcium

B. magnesium

C. potasssium

D. nitrogen

E. phosphorus

The earthworm is important to the farmer because it

A. improves soil structure

B. improves soil texture

C. destroys soil pathogens

D. adds nutrients to the soil

E. prevents soil erosion

The type of rocks formed from the molten magma is known as

A. sedimentary

B. igneous

C. metamorphic

D. schist

E. sandstone

The relationship between the microorganisms and plant in the nitrogen cycle is best described as

A. parasitism

B. commensalism

C. competition

D. symbiosis

E. saprophytism

The type of energy obtained from the sun for agricultural uses is known as

A. potential energy

B. mechanical energy

C. nuclear energy

D. solar energy

E. kinetic energy

Which of the following implements will be used for the next farm operation after clearing a new farmland?

A. harrow

B. ridger

C. cultivator

D. planter

E. plough

Which of the following cannot be used to rub the metal parts of farm tools before storage?

A. grease

B. plam oil

C. water

D. petroleum jelly

E. spent engine oil

The common surveying equipment for farmland include the following except

A. ranging pole

B. prismatic compass

C. measuring tape

D. gunter's chain

E. spade

An example of fungal disease of stored grains is

A. rosette

B. wilt

C. soft rot

D. damping off

E. mould