Agricultural Science

Question 1

1A plant that completes its life cycle in one season is

Easy

A. a biennial B. a perennial C. an annual D. a weed

Question 2

2Maize belongs to the group of crops called

Easy

A. legumes B. cereals C. vegetables D. tubers

Question 3

3C₄ plants such as maize are more efficient than C₃ plants in

Hard

A. cold shade B. darkness C. waterlogged soils D. hot, sunny conditions

Question 4

4The best time to harvest maize for dry grain is when

Easy

A. the plant is knee high B. the silk first appears C. tassels appear D. the husks are dry and grains hard

Question 5

5A farmer needs 60 kg/ha of P₂O₅ using single superphosphate (18% P₂O₅). The fertiliser needed per hectare is about

Hard

A. 60 kg B. 108 kg C. 333 kg D. 180 kg

Question 6

6Gibberellins promote

Hard

A. leaf fall B. root death C. stem elongation and seed germination D. dormancy

Question 7

7The part of a seed that develops into the root is the

Easy

A. cotyledon B. testa C. radicle D. plumule

Question 8

8NPK fertiliser supplies nitrogen, phosphorus and

Easy

A. calcium B. potassium C. sodium D. iron

Question 9

9A fertiliser bag labelled 15-15-15 contains

Hard

A. 15% N, 15% P₂O₅, 15% K₂O B. 15 kg of each nutrient C. 15% water D. only nitrogen

Question 10

10Hybrid seeds are often preferred because they

Medium

A. give higher yields and uniform crops B. can be replanted without loss of vigour C. need no fertiliser D. are always cheap