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Subject: Agronomy × End date: 1982 × Start date: 1982 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Shade tolerance of guinea grass var. mackuenii under different levels of potassium
    (Department of Agronomy, College of Agriculture, Vellayani, 1982) Mullakoya, P; KAU; Raghavan Pillai, G
    An investigation was carried out in the Instructional Farm attached to the College of Agriculture, Vellayani, during 1981-82 with the objective to assess the production potential of guinea grass var. Mackuenii under varying intensities of shade. It was also aimed to assess the potassium requirement was laid out in a 4 x 4 factorial randomised block design with 3 replications. The results of the study are summarised below: (1) Height of grass was positively influenced by both shade intensities and potash levels. (2) Leaf area of grass was increased with increase in shade intensities and potash levels. (3) Tiller production was adversely affected by shade, while potash application increased tiller number of grasses.
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    ThesisItemOpen Access
    Tillage requirements of cowpea
    (Department of Agronomy,College of Agriculture, Vellayani, 1982) Ravi Kumar, P K; KAU; Sadanandan, N
    An experiment was conducted at the Rice Research Station, Pattambl, during the third crop season of 1980-31 to evolve suitable cultural practices for raising cowpea in summer rice fallows. Six levels of tillage and three levels of interculture were tried in all combinations. The study was undertaken with a view to find out the minimum tillage requirements of cowpea and to study the effects of different levels of interculture on the yield of cowpea. The study revealed that tillage had no effect on the retention of soil moisture during the crop growth Drymatter content of the weeds was found to be higher in no-tilled treatments* An increase in plant height, number of leaves and drymatter production, was observed at all the levels of tillage* But dry weight of root i nodules remained unaffected.
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    ThesisItemOpen Access
    Shade response of common rainfed intercrops of coconut part II legumes
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1982) Sansamma George; KAU; Vikraman Nair, R
    The experiment was laid out in randomised block design with four levels of shade and five replications. The study revealed that all the legumes tried viz., cowpea, blackgram, groundnut and redgram, were all shade sensitive.
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    ThesisItemOpen Access
    Nitrogen phosphorus and potassium requirements of chilli (Capsicum annuum L.) variety pant C-1
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1982) Joseph, P A; KAU; Balakrishna, Pillai P
    Field experiments were conducted at the Instructional Farm, Vellanikkara during the periods from May to September 1981 and November 1981to February 1982 to study the effects of graded doses of nitrogen, phosphorus and potassium on the growth and yield of chilli variety Pant. C.1 in two seasons.
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    ThesisItemOpen Access
    Differential response of two medium duration rice varities to time of planning and graded doses of nitrogen
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1982) Lathif, P H; KAU; Balakrishna, Pillai P
    An experiment to study the differential response of two medium duration rice varieties to time of planting and graded doses of nitrogen was conducted during the mundakan season of 1980 – 81, at the Research Station and Instructional Farm Mannuthy. The experiment was laid out in split plot design, with combinations of four time of planting (September 25th, October 10th, October 25th and November 9th) and 2 varieties (Jaya and Sabari) in the main plot and 3 levels of nitrogen (60, 90, 120 kg/ha) in subplots. Observations on the plant growth characters were recorded at 30th day, 60th day after planting and at harvest. Chemical analysis of plants at these stages were also done. Time of planting significantly influenced the growth characters as well as the yield and yield attributes. Plant height, panicle length, number of spikelets, number of filled grains, percentage of filled grains, dry matter production, grain yield, straw yield, harvest index, grain straw ratio, total nitrogen uptake at harvest, nitrogen uptake by grain, content of phosphorous in straw and grain and the total uptake of phosphorous at harvest and potassium uptake by grain were significantly higher in the early planted crop, than in later planted crops. However, number of days taken to 50 per cent flowering, and to maturity, production of tillers and productive tillers, phosphorous content of straw and potassium content of grain were positively influenced by delayed planting. Sabari recorded significantly higher number of days to flowering and maturity than Jaya. Higher levels of nitrogen were found to increase the dry matter production and nitrogen, phosphorous and potassium content of straw.