1. Using the left-over mushroom growing materials to make new material for growing mushrooms
Formula
- New Sawdust from Rubber Trees 70 Kilograms
- Leftover Material from Growing Mushrooms 30 Kilograms
- Fine Rice Bran 6 Kilograms - Epsom Salt 0.1-0.2 Kilogram
- Phosphate ore or Pumice 2 Kilograms - Gypsum 1 Kilogram
- Lime or Dolomite 1 Kilogram - Water
- Supplementary Food; broken-milled rice, grinded corn, etc. (1 Kilogram each)