Topic: Reasoning Chains for NEET Problem-Solving

REASONING CHAIN 1: "Which biofertilizer for this crop?"

Step 1: Is the crop a legume (pea, soybean, groundnut, gram)? → YES: Use Rhizobium (will form nodules, symbiotic $N_{2}$ fixation) → NO: Go to Step 2

Step 2: Is the crop grown in flooded/waterlogged conditions (paddy/rice)? → YES: Use Anabaena or Nostoc (cyanobacteria thrive in flooded fields) → NO: Go to Step 3

Step 3: Is the crop a dryland cereal (wheat, maize, barley)? → YES: Use Azotobacter (free-living $N_{2}$ fixer for soil) or Azospirillum (rhizosphere) → Add Glomus for phosphorus enhancement in phosphorus-deficient soils