Q. Which of the following are classified as straight fertilizers?

1. Ammonium Chloride
2. Single Super Phosphate (SSP)
3. Diammonium Phosphate (DAP)

Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Straight fertilizers supply only one primary plant nutrient. Ammonium Chloride provides nitrogen, and Single Super Phosphate (SSP) provides phosphorus; both are straight fertilizers. Diammonium Phosphate (DAP) provides both nitrogen and phosphorus, classifying it as a complex fertilizer, not a straight fertilizer.