ISBN: - 978-93-88936-09-5 ii) 3. Pigging 4. Maintaining Total Chemical fertilizer 5,000 13,000 3,000 4,000 32,500 3.5 FERTILIZERS USED FOR CULTIVATION Cow-dung is basic fertilizer for rubber. For 1 acres of land 1,500 kilogram of cowdung should be used. Chemical fertilizer should be mentioned by Nitrogen - Phosphorous Potassium Magnesium Urea - 800 grams 800 grams - 600 grams - 500grams - 400grams 3.6 VARIETY OF RUBBER The various varieties of rubber plants should be mentioned namely: i) T.G.R. ii) P.V. – 86 iii) R.R.I – 600 iv) v) 10S vi) P.V.28/sa 40S 3.7 EXPENSES INCURRED IN PRODUCTION FOR 1KG OF SHEET For producing 1kg of rubber sheet, the expenses should be incurred around Rs.47. It can be spitted in 32 rupees for tapping, 8 rupees for collecting latex, 2 rupees for formic acid 1 rupee for milling and 4rupees for Drying. Maximum amount is spent for tapping of rubber tree. 3.8 IMPORTANCE OF NATURAL RUBBER Natural rubber is the most useful material known to mankind on account of its wide range of application in everyday life. It has been the life – bold of Indian rubber goods manufacturing industry since independence. It is considered as a product not consumable by itself. It has derived demand and it is dependent heavily on the automobile and tyre manufacturing sectors. Cars do not move without rubber. Without an adequate supply of natural rubber, the wheels of the world industry will come to a grinding halt. Natural rubber 64
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