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Agronomy QUESTION #2040
Question 1
Farm yard manure (FYM) is considered a 'complete fertilizer' because:
  • It contains only nitrogen in very high concentrations
  • It supplies all three major nutrients (N, P, K) plus secondary and micronutrients, organic matter, and beneficial microorganisms, improving both soil fertility and physical properties✔️
  • It releases nutrients faster than any synthetic fertilizer
  • It permanently raises soil pH to optimum levels for all crops
Correct Answer Explanation
FYM contains N (0.5%), P₂O₅ (0.25%), K₂O (0.5%) plus Ca, Mg, S, and micronutrients. More importantly, its organic matter improves soil structure, water-holding capacity, cation exchange capacity, and microbial activity — benefits no single synthetic fertilizer can provide.