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Agronomy QUESTION #2023
Question 1
The critical difference between a straight fertilizer and a complex fertilizer is that:
  • Straight fertilizers contain only organic nutrients while complex fertilizers are synthetic
  • A straight fertilizer supplies only one primary nutrient, whereas a complex fertilizer contains two or more primary nutrients in each granule chemically combined✔️
  • Complex fertilizers are always liquid while straight fertilizers are granular
  • Straight fertilizers are slow-release while complex fertilizers are immediately available
Correct Answer Explanation
Straight fertilizers (e.g., urea, SSP, MOP) supply a single primary nutrient (N, P, or K respectively). Complex fertilizers (e.g., DAP, NPK) contain two or more nutrients chemically combined in each granule, ensuring uniform nutrient distribution in the field.