2. Institutional Publications

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Author: search.filters.author.Gracy Mathew

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    Nitrification pattern in a laterite soil
    (Kerala Agricultural University, 1991) Gracy Mathew; Vikraman Nair, R
    An investigation was conducted at the College of Horticulture, Vellanikkara, Trichur during 1984-85 with typical laterite soil collected from Vellanikkara to study the nitrification pattern in the soil and to examine the effect of various factors on nitrification. The rate of nitrification in the soil was found to be naturally low. Attempts were made to locate the factors responsible for the low rate of nitrification. Factors like build up of ammoniacal nitrogen to values around 100 ppm, pH, organic matter content, cropping history, moisture level of incubation, source of fertiliser nitrogen and lack of microbial population were not indicated as responsible for the naturally low rate of nitrification.
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    Correlation and yield component analysis in greengram (Vigna Radiata L.) in summer rice fallows
    (Kerala Agricultural University, 1996) Kanakamany, M T; Gracy Mathew; Leenakumary Tessy Joseph, S; Tessy Joseph
    Twelve genotypes of greengram were evaluated during summer 1995 in the rice fallows of tiie Regional Agricultural Research Station, Pattambi. WGG 62 was the highest yielder among the genotypes tested. Out of the ten characters studied the number of pods per plant, per day productivity, chlorophyll ' a' and total chlorophyll contents showed positive and significant association with grain yield. Duration of the crop was found to have no direct relation with yield.
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    Response of rice to phosphorus solubilising bacterial culture for its P utilisation under waterlogged condition
    (Kerala Agricultural University, 1996) Anilakumar, K; Gracy Mathew
    The response of P solubilising bacterial culture to waterlogged rice was evaluated in a field experiment. The bacterial culture had no effect on P availability in soil and P uptake by plants at any stage of crop growth There was no marked advantage for the bacterial culture on yield or in reducing the recommended dose of P to waterlogged rice where there is little response to applied P.
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    Effect of phosphorus and sulphur on growth, yield and nutrient uptake of rainfed upland cowpea
    (Kerala Agricultural University, 1998) Gracy Mathew; Sreenivasan, E; Anilakumar, K
    A field experiment was conducted during kharif 1992-94 in a sandy loam acid laterite soil to study the effect of graded doses of phosphorus and sulphur on the yield and nutrient uptake of rainfed cowpea (Vigna unguiculata [L.j Walp). The different levels of phosphorus showed significant difference in the yield and nutrient uptake of cowpea. Maximum grain yield and nutrient uptake was obtained with application of 60 kg P3O5 ha'1. The net return was also highest with this level of phosphorus nutrition. Application of sulphur did not show any remarkable influence on growth, yield and nutrient uptake of cowpea.
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    Relationship among leaf nitrogen content, SPAD and LCC values in rice
    (Kerala Agricultural University, 2000) Johnkutty, I; Gracy Mathew; Thiyagarajan, T M; Balasubramanian, V