WAEC Agricultural Science Past Questions & Answers - Page 207

I. Allowing land to fallow 
II. Applying organic fertilizer 
III. Practicing monoculture 
IV. Growing legumes. 
The spread of diseases and pests can be checked by

 

I. Allowing land to fallow 
II. Applying organic fertilizer 
III. Practicing monoculture 
IV. Growing legumes. 
Which of the following combinations will help to improve soil fertility status?

Chlorosis with characteristic parallel white or yellow streaks observed along the veins of leaves is a deficiency symptom of

Micro-nutrients are likely to be deficient in

Which of the following soil elements becomes readily available at pH values above 8?