Harvesting sugarcane at its peak maturity stage is desirable to get the maximum sugar yield. Cane varieties differ in their ages according to the varieties and other factors. Sucrose content in the cane steadily increases while glucose and reducing sugar gradually decrease as the canes attain near maturity. Various methods of determining the maturity in sugarcane are followed based on the physical and chemical characteristics. Some of the common methods followed are (1) Top-bottom ratio, (2) Trial boiling method. (3) Hand refractometer method, etc. Later workers have used sheath moisture ratio and leaf nitrogen content as indices for determining maturity. The present investi-gation aims at determining the cane maturity by green vs. dry leaves ratio as one of the other methods. Various workers on maturity indices in sugarcane have made various observations (Agharwala and Gupta, 1951, Clements, 1955, Burr et al. 1957 and Bonnet, 1962.)
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Tamil Nadu Agricultural University
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003
Tamil Nadu, India.
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