The most common weed of pastures in Nigeria is

A. spear grass

B. goat weed

C. water leaf

D. tridax

E. sida

The following are forestry crops except

A. tectona grandis

B. gmelina arborea

C. anarcadium

D. pinus eliotis

E. chlorophora excelsa

The pest designated as a national pest by the Nigeria Agricultural Advisory Council is

A. variegated grasshopper

B. thrips

C. capsid

D. cricket

E. weevil

Which of the following groups comprises only oil crops?

A. groundnut, jute and cotton

B. melon, coconut and sisal hemp

C. coconut, cotton and sunflower

D. sunflower, rubber and jute

E. oil palm, sunflower and jute

The mosaic symptom commonly associated with viral diseases of crops can be best observed on

A. roots

B. stem

C. leaves

D. fruits

E. flower

Pests of crops that feed by piercing and sucking plants include the following except

A. stem borers

B. aphids

C. cocoa mirids

D. cotton stainers

E. cassava mealy bugs

Maize grows best on

A. sandy soil

B. sandy-clay soil

C. clayey-loam soil

D. loamy soil

E. silty-clay soil

Soil may be exposed to erosion when a pasture is

A. undergrazed

B. overgrazed

C. paddocked

D. weeded

E. fanced

Taungya farm involves the combination of

A. crop and animal husbandary

B. crop husbandary and forestry

C. forestry and animal husbandary

D. crop husbandary and fish farming

E. forestry and fishing farming

The destructive effects of variegated grasshoppers are conspicuously observed on

A. cassava and yam crops

B. cocoa and citrus crops

C. cowpea and maize crops

D. maize and cassava crops

E. citrus and weeds