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ISSN 2454-485X (Online)
ISSN 2454-4841 (Print)

Volume 15, Number 1, (June 2002) Articles 13 - 18

- SELECTION OF VIGOROUS CLONES OF HEVEA THROUGH REGRESSION METHODResearch Articles
- Pages 76 - 87
- S.K. Dey & K.R. Vijayakumar
- - Abstract
  - Keywords
  The growth behaviour of 25 Hevea clones in response to weather parameters in immature stage (3 to 7 years) was studied. Relative growth rate (RGR) showed positive correlation with monthly rainfall and relative humidity and negative correlation with maximum temperature and sunshine hours. RGR declined by nearly 50% when sunshine increased by more than six hours. The influence of weather is cumulative in perennial crops like rubber. Total rainfall and cumulative monthly mean sunshine hours for a period of five years were used in this study for developing a multiple regression equation to predict the growth of clones. A close relationship between girth and weather parameters was established (R²=0.994). The girth regressed with months after field planting gives an indication of potential clones. The method was found suitable for early prediction of vigorous Hevea clones during immaturity period in traditional regions.
  
  Growth, Hevea brasiliensis, Multiple regression, Rainfall, Sunshine hours, Weather
- EFFECT OF HYDROGEN CYANAMIDE AND ROCK PHOSPHATE ON SPROUTING AND EARLY GROWTH OF BROWN BUDDED STUMPS OF HEVEAResearch Articles
- Pages 88 - 92
- V.C. Mercykutty, Joseph G. Marattukalam & C.K. Saraswathyamma
- - Abstract
  - Keywords
  In a nursery experiment, the effect of the growth hormone, hydrogen cyanamide in two concentrations viz., 0.5% and 1.0% with and without rock phosphate application on bud sprout and scion growth of brown budded stumps of Hevea clone RRII 105 was evaluated. It was observed that a combination of 1.0% hydrogen cyanamide with 25g rock phosphate increased early sprouting and consequently plant height, number of leaves, number of leaf whorls, biomass and number of usable plants at 2-3 leaf whorl stage. Application of rock phosphate induced sprouting of more buds.
  
  Bud induction, Growth regulator, Hevea brasiliensis, Hydrogen cyanamide, Rock phos-phate
- A SIMPLE AND EFFICIENT METHOD FOR THE ISOLATION OF TOTAL RNA AND mRNA FROM MATURE LEAVES OF HEVEA BRASILIENSISShort Scientific Reports
- Pages 93 - 95
- Molly Thomas, K.G. Raghothama & James Jacob
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- EFFECT OF PANEL CHANGING ON TAPPING PANEL DRYNESS IN HEVEAShort Scientific Reports
- Pages 96 - 99
- R. Krishnakumar & James Jacob
- - Abstract
  - Keywords
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- PHOTOSYNTHESIS AND RESPIRATION IN POWDERY MILDEW AFFECTED LEAVES OF HEVEA BRASILIENSISShort Scientific Reports
- Pages 100 - 102
- K. Annamalainathan & James Jacob
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- FLORA OF RUBBER AND OTHER PLANTATIONS IN TRIPURAShort Scientific Reports
- Pages 103 - 106
- N.K. Chakraborty, T.K. Pal, S.K. Dey & Y.A. Varghese
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Digital library

Volume 15, Number 1, (June 2002) Articles 13 - 18