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Theses

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1981 - 19862
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Subject: Agronomy × Author: Gopinathan, R × End date: 1998 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of shade and moisture regimes on the growth of cocoa seedlings
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1981) Gopinathan, R; KAU; Vikraman Nair, R
    An experiment was conducted at the College of Horticulture, Vellanikkara during 1979-80 on the effect of shade and moisture regimes on the growth of cocoa Theobroma cacao L.) seedlings. The investigations were carried out to arrive at the optimum shade and moisture requirement for the growth of cocoa seedlings. The experiment was laid out in a completely randomised design with four levels of shade and three levels of moisture with four replications. The study revealed that cocoa seedlings must be shaded and well watered for their better growth. 50 – 55% shade and irrigation at 75% available moisture was found best. Death of all the seedlings in the open by the third month of observation stresses that, cocoa seedlings cannot be grown without any shade irrespective of the frequency of irrigation. Expect net assimilation rate (NAR) and leaf area ratio (LAR) all the growth characters were increasing with increasing shade (up to 50 – 55%) and increasing frequencies of irrigation.
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    ThesisItemOpen Access
    Agrotechniques for soil conservation in taungya systems
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1986) Gopinathan, R; KAU; Sreedharan, C
    An experiment on 'Agrotechniques for soil conservation in taungya systems' was conducted at the Instructional Farm, College of Horticulture, Vellanikkara for a period of two years from May 1984 to April 1986. The objectives of the experiment were to asses the run-off, soil and nutrient losses as influenced by the important taungya practices and to evolve economically and ecologically viable agroforestry measures for soil conservation. Eucalyptus , the main tree component , was intercropped with the usually cultivated taungya crops of cassava and rice . The efficiency of cassava planting on ridges, grass farming and grass stripping was also investigated. There were seven treatments replicated thrice in RBD. Daily run-off and soil loss were quantified by installing multi-slot device consisting of 47 slots and brick masonry settling tank specifically designed for the project.