2. This includes materials which are derived from plants and animal origin such as
animal manure and crop residues.
a. Crop residues
b. Single element fertilizer
c. Organic Fertilizer
d. Inorganic Fertilizer
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Answer:
C. organic fertilizer
Explanation:
Manure is organic matter that is used as organic fertilizer in agriculture. Most manure consists of animal feces; other sources include compost and green manure.
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