If T represents the gene for tallness while t represents dwarfness. The genotypic ratio of the second filial generation will be

• A. 3:1
• B. 1:2:1
• C. 2:2
• D. 4:0

_______ is concerned with the study of the inter-relationships between groups of organisms living together in an area

• A. Autecology
• B. Synecology
• C. Ecosystem
• D. Ecology

An important forage crop in West Africa is

• A. maize
• B. rice
• C. giant star grass
• D. guinea corn

When poultry flock, the birds keep passing out green, foul-smelling faeces with nervous symptoms, it means that the farmer

• A. has not asministered newcastle disease vaccine
• B. neglected to treat them againt gumboro disease
• C. is giving the birds protein-deficient diet
• D. is feeding a diet high on calcium

Output is higher in commercial agriculture because of the following reasons except

• A. adequate finance
• B. cultivation of large hectares of land
• C. employment of large labour force
• D. utilization of complex farm machinery

The reduction of three seedlings of maize to two plants per stand is referred to as

• A. rogueing
• B. thinning
• C. weeding
• D. pruning

Below is the illustration of farm implements. The part which makes horizontal cuts into the soil and uproots weeds is labelled as

• A. I
• B. II
• C. III
• D. IV

Farm surveying equipment include the following except

• A. cross staff
• B. abney level
• C. datum
• D. chain

Excessive drainage of soil water can be checked by the addition of adequate quantities of

• A. N.P.K 15 - 15 - 15
• B. sulphate of ammonia
• C. single superphosphate
• D. compost manure

The most effective method of controlling or preventing viral diseases in plants is by

• A. practising crop rotation
• B. spraying crops regularly
• C. planting resistant varieties
• D. burning affected crops