The correct sequence of pre-planting operations in

A. \(clearing \to stumping \to ploughing \to harrowing\)

B. \(stumping \to ploughing \to harrowing \to clearing\)

C. \(bulldozing \to harrowing \to stumping \to ploughing\)

D. \(clearing \to bulldozing \to stumping \to harrowing\)

Heat treatment of oil palm seeds before sowing helps to

A. mobilize nutrients for the embryo

B. harden the mesocarp

C. break embryo dormancy

D. improve disease resistance

Imported plants are expected to be

A. vaccinated

B. improved upon

C. treated

D. quarantined

A breeding method which involves the production of heterozygous populations from homozygous lines is

A. inbreeding

B. introduction

C. selection

D. hybridization

A raw material that could be obtained from the forest is

A. margarine

B. honey

C. mutton

D. butter

Which of the following methods of plant propagation is limited to plants which root easily?

A. Grafting and cutting

B. Layering and cutting

C. Budding and layering

D. Grafting and layering

Which of the following practices is not a way of maintaining ornamental plants?

A. Pruning

B. Weeding

C. Watering

D. Harvesting

Which of the following pairs of diseases attack coffee?

A. Mosaic and smut

B. Smut and ridge

C. Rust and mosaic

D. Rust and leaf spot

Insect-pests of crops could be controlled by

A. cover-cropping

B. mulching

C. crop rotation

D. organic manuring

Which of the following insect-pests does not attack cotton?

A. Aphid

B. Cotton stainer

C. Weevil

D. Pink bollworm