a) Explain the roles played by the following essential elements in plants, citing the forms in which they are absorbed:


i. Phosphorous
ii. Calcium
b) Discuss the negative implications of inorganic fertilizers to the environment.
c) Describe the classification of fertilizers, giving an example of each type
d) Describe the three categories of Nutrient use efficiency (NUE), giving the expression on
how each can be determined
e) Discuss the effects of soil acidity on the availability of N and P nutrients to plants.
f) Describe the Mn and Al toxicity, and their effects in plants growth.

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