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Jacob Mathew
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Agriculture, Biological Sciences & Forestry Library & Information Science

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Effect of borax application on young coconut palms P.G. Kamalakshiamma; M. Shanavas; D. Prema; Jacob Mathew
International Coconut Community Journal Vol 21 No 2 (2005): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v21i02.404

Abstract

There is increasing incidence of boron deficiency in coconut palms in the root (wilt) affected tract in the southern districts of Kerala, India. An earlier survey in this tract indicated that 19-25% of the palms had boron deficiency symptoms. The symptoms manifested due to boron deficiency in coconut palms include malformations in leaves as well as in the nuts resulting in stunted growth and low productivity. A field experiment was conducted at Central Plantation Crops Research Institute, Kayamkulam to study the effect of different doses of boron on deficiency symptoms and the nutrition of coconut seedlings. The results revealed that the seedlings which had boron deficiency symptoms showed recovery with the boron application. Among the different levels of borax (Na2B4O7.10H2O) tried on coconut seedlings, application of 300 g borax per seedling per year in two equal splits was found effective to achieve recovery and to improve the growth of the young seedlings. The seedlings treated with borax showed improvement in growth parameters such as girth at collar, annual leaf production and total functional leaves and boron content in leaf tissues.
VARIATIONS IN THE YIELD OF COCONUTS, AS INFLUENCED BY THE PATTERN OF RAINFALL AND DURATION OF DRYSPELL Jacob Mathew; Amarnath C.H.; Vijaya Kumar K; Mohamed Yusuf; Balakrishnan T K.
International Coconut Community Journal Vol 4 No 02 (1988): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v4i02.219

Abstract

Study of the variations in the yield of coconuts in the West Coast of India, in relation to the pattern of rainfall and duration of dryspell revealed that the yield obtained in any year is not directly related with the total rainfall received in the same year or in the preceeding years. Summer rains were having positive correlation with the yield in the succeeding year. About 60% of the variations in the annual yield were due to the changes in the duration of dryspell in the preceeding two years.
FORECAST OF ANNUAL YIELD OF COCONUTS, BASED ON BIOMIETRICAL CHARACTERS Jacob Mathew; K. Vijaya Kumar; PTN Nambiar; CH Amarnath
International Coconut Community Journal Vol 7 No 01 (1991): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v7i01.245

Abstract

Based on the observations recorded for four years, at Kasaragod and Kayangulam, Kerala, India, on palms of ordinary tall variety, growing under rainfed conditions, appropriate prediction equations have been proposed to estimate the annual yield of coconuts, at selected periods of the year, based on a total count of nuts in different stages of maturity.
Co-Authors Amarnath C.H. Balakrishnan T K. CH Amarnath D. Prema K. Vijaya Kumar M. Shanavas Mohamed Yusuf P.G. Kamalakshiamma PTN Nambiar Vijaya Kumar K