Which of the following fertilizer comes under the category of straight fertilizer?

🔑 Key Points
Fertilizer:
→ Fertilizer is any material of natural or synthetic origin added to the soil to supply one or more plant nutrients.

🌱 Straight Fertilizers:
→ Straight fertilizers are those which supply only one primary plant nutrient, namely nitrogen, phosphorus, or potassium.
→ Examples: Urea, ammonium sulfate, potassium chloride, and potassium sulfate.

🌾 Complex Fertilizers:
→ Complex fertilizers contain two or three primary plant nutrients, of which two primary nutrients are in chemical combination.
→ These fertilizers are usually produced in granular form.
→ Examples: Diammonium phosphate, nitro-phosphates, and ammonium phosphate.

🌿 Mixed Fertilizers:
→ These are physical mixtures of straight fertilizers.
→ They contain two or three primary plant nutrients.
→ Mixed fertilizers are made by thoroughly mixing the ingredients either mechanically or manually.