2. Institutional Publications

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Author: search.filters.author.George, T PHas files: Yes

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    Effect of leaf area on tuber yield of irrigated tapioca
    (Kerala Agricultural University, 1982) Sushama, P K; Pillai, G R; George, T P; Jose Mathew
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    Inflow rate AMD cutoff ratio for irrigation in nearly level border strips
    (Kerala Agricultural University, 1987) Visalakshi, K P; George, T P
    The experiment was done to study the hydraulics, of border strip irrigation in nearly level lands, during 1982. The study revealed that the discharge rate of 2 l/s/m and the inflow cutoff length of 77 per cent of the strip length are optimum for uniform distribution of water for the following reasons: 1) The depth of irrigation could be limited to 5cm even in soils having high rate of infiltration; 2) The lower discharge rate of 2 l/s/m reduced the time of ponding at the downstream end and this minimised the wastage due to deep percolation at the downstream end; 3) Soil erosion was minimum at this rate of discharge; 4) Long strips upto 45 m length in loamy sand could be irrigated with high degrees of efficiency; and 5) As only a low rate of discharge was required to practise this method, even in areas having limited availability of water an additional crop could profitability be raised.
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    Infiltration opportunity time in level or nearly level borders
    (Kerala Agricultural University, 1987) Visalakshi, K P; George, T P
    The study was conducted in 1982 with an objective of finding out the infiltration opportunity time in nearly level border strips. The results revealed that a discharge rate of 2 l/s/m is the best for irrigating nearly level borders of 4-6 m width. This discharge rate gives almost equal opportunity time throughout the entire length of the strip excepting at the downstream end, thus giving better distribution efficiency. The recommended length of strip is upto 45 m and these can be laid in the direction of natural slope.
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    Development and evaluation of a mechanical collecting system for salvinia weed
    (Kerala Agricultural University, 1987) Sankaranarayanan, M R; Jose Samual; George, T P
    Salvinia harvesting machine is a mechanical device suitable for removal ofsalvinia weed (locally known as African Payal) from the waterways. The harvesting capacity of the equipment is 16 t/h. The estimated cost of the machine is about Rs. 5000 besides the cost of the high head centrifugal pumpset. The operating cost of the equipment is calculated as Rs. 28 per hour and this amounts to a weed clearing cost of Rs. 280from one hectare of weed infested rice field.
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    Evaluation of different methods for reducing percolation loss of water in rice fields
    (Kerala Agricultural University, 1983) George, T P; Balakumaran, K N; Jose Mathew; Sushama, P K; Pillai, G R; Kuruvilla Varghese
    Afield experiment was conducted in a sandy loam soil of the Agronomic Research Station, Chalakudy for five years (1974-'80 to study the efficiency of puddling with different implements (power tiller, country plough and wetland puddler), soil dressing with lateritic,loam and sub-soil compaction at 30 cm depth in reducing percolation loss in rice fields. The study showed that these methods neither effectively reduced the water loss nor influenced the grain yield.
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    Effect of distributor on flow rate in a drip irrigation system
    (Kerala Agricultural University, 1994) Susan Cherian, K; George, T P
    The effect of distributor on flow rate was studied. For each diameter of microtube, different length combinations of inlet tubes and drippers were tried. It was found that the discharge rate from the system with the distributor was higher than that of microtube having the same length and size. The frictional losses, the combined minor losses and distributor losses for different flow conditions were estimated. From the observed data, a few combinations which satisfied the requirements, viz., length, discharge and pressure head were selected to use as a guideline for design of the KAU drip irrigation system.