WAEC Agricultural Science 2009 Question 11

Question 11

Soil Fertility and Plant Nutrition

It is not advisable to apply fresh farmyard manure because

  1. A.its heat of decomposition may cause scorching of plants
  2. B.some micro-organisms in the manure may die
  3. C.the manure may increase soil acidity
  4. D.the manure may increase soil alkalinity
Show the answer and explanation

Answer: A (its heat of decomposition may cause scorching of plants)

Explanation

Fresh manure heats up as it decomposes and can burn (scorch) young plants; it should be allowed to rot first.