MATERIAL FOR WARMING RICE PADDY AND WARMING OF RICE PADDY

摘要

PROBLEM TO BE SOLVED: To permit rice paddy to be warmed simply at low costs. SOLUTION: A substance emitting heat by hydration, water absorption or water application is contained in a water or moisture-permeable package. The substance emitting heat by hydration is, for example, sulfuric acid and relating substance 8 or alkalis such as calcium oxide 9. Sulfuric acid is stored in an accumulation of moistening material such as dried soil or sand or rock fibers.