2. Institutional Publications
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Item Moisture retention characteristics of red and forest soils of Kerala(Kerala Agricultural University, 1985) Reena Mathew; Vikraman Nair, RMoisture retention studies of red and forest soils were conducted at the College of Horticulture at six different tensions ranging from 0.3 to 15 bar. The results revealed that the clayey textured forest soil retained higher moisture at all the tensions than red soil which is sandy c!ay loam in texture. The field capacity and wilting coefficient values were 24.85 and 18.15 per cent, respectively for forest soil as against 10.45 and 7.21 percent for red soil. About 50 percent of the available water was removed when the tension increased from 0.3 to 1 bar. Significant positive correlations were obtained between moisture contents at different tensions and the contents of clay and silt while the relation with fine sand was significant and negative. Organic carbon failed to show any significant influence on moisture retention but the content of gravel had a depressing effect on moisture percentage especially at 0.3 bar. Regression equations with high predictability have been developed to estimate field capacity and witting coefficient from the contents of organic carbon, textural separates and gravel.Item Consumptive use, pattern of soil moisture extraction and water use efficiency of bittergourd (Momordica Charantia L.) under varying irrigation and nitrogen levels(Kerala Agricultural University, 1993) Manorama Thampatti, K C; Santha Kumari, G; Reena Mathew; Chandrasekharan, PThe influence of graded doses of nitrogen and varying levels of irrigation on consumptive use of water, paltern of soil moisture extraction, water use efficiency and f r u i t yield of biltergourd were evaluated during 1988-89 and 1989-90. The consumptive use of water and lit/Eo values of bittergourd increased progressively with levels of nitrogen and irrigation. At higher moisture regimes the variation in consumptive use and Ht/Eo values did not reflect in crop yield. Wale ruse efficiency of the crop maintained a positive relation with levels of nitrogen and a negative relation with levels of irrigation. The soil moisture extraction paltern was not influenced by nitrogen levels. Major part of water was extracted from upper layers of soil irrespective of treatments.Item Effect of Azospirillum inoculation on seedling vigour in rice(Kerala Agricultural University, 1994) Girija, D; Varadarajan Nair, P; Reena MathewItem Influence of summer cropping and fallowing on fertilizer use efficiency and productivity of rice(Kerala Agricultural University, 1996) Jose Mathew; Reena Mathew; Kuruvilla Varughese; Santhakumari, G; Pillai, G R