Answer: a. Soil fertility comes from a balance of organic matter and other mineral nutrients.
Explanation:
Soil fertility is the quality of soil which makes it suitable for the growth of the plants.
The fertility of the soil is not just dependent upon the organic matter present in the soil but also dependents upon the inorganic mineral content. The organic content increases the water holding capacity of soil which ensures that the plants get adequate moisture for their growth. Also, the inorganic minerals like calcium, potassium, nitrogen helps in different stages of growth and development in plants.
Soil rich in organic matter alone will not be fertile because ; ( A ) soil fertility comes from a balance of organic matter and other mineral nutrients
For a soil to be fertile it has to be rich in both organic and inorganic nutrients because the organic matter helps in the retention of moisture in the soil necessary for the growth of plants. while
Inorganic nutrients such as calcium, potassium, help for the growth of plants at various stages of plant development.
Hence we can conclude soil rich in organic matter alone will not be fertile because, soil fertility comes from a balance of organic matter and other mineral nutrients
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