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    Changes in IAA levels in rice due to urea-carbofuran interaction
    (Kerala Agricultural University, 1990) Abdul Salam, M; Subramanian, S
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    Effect of applied potassium and rhizobial inoculation on nodulation and uptake of fertilizer nutrients by soybean
    (Kerala Agricultural University, 1983) Reena Grittle Pinhero; Tajuddin, E; Abdul Salam, M; Vikraman Nair, R
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    Effect of continuous application of fertilizer nutrients on the long term productivity of a rice cropping system
    (Kerala Agricultural University, 1990) Tajuddin, E; Abdul Salam, M; Shahul Hameed, S M; Yageen Thomas; Devandesan, S
    Field experiments conducted for a period of seven years to study the effect of continuous application of fertilizer nutrients on the long term productivity of a rice based cropping system revealed that nitrogen application increased grain yield in all the seasons for a period of seven years. Both the physical and economic optimum dose of N decreased @ 4.06 and 3.7% per season, respectively. Nitrogen application @ zero and 120 kg/ha per season continuously over a period of five years, decreased the grain yield @ 1.47 and 1.28 g/ha/year, respectively. But application of N @ 40 kg/ha during the same period increased grain yield 6 1.22 q/ha/year. The productivity of plots applied with N @ 80 kg/ha remained stable. The study clearly revealed the possibility of skipping P for four years and K for seven years in soils containing medium amounts of these nutrients. Application of N at optimum dose is important to maintain the long term productivity of a rice based cropping system involving rice-rice-fallow.
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    Effect of graded doses of N, P and K on the yield and quality of blackgram var. KM-1 grown in rice fallows
    (Kerala Agricultural University, 1981) Annamma George; Nair, K P M; Abdul Salam, M
    The field experiment conducted during the third crop season of 1978-79 in the rice fallows of Instructional Farm, College of Agriculture, Vellayani, Trivandrum to study the effect of three levels each of nitrogen {20,30 and 40 kg ha), phosphorus (30, 45 and 60 kg/ha) and potash (10,20 and 30 kg/ha) on the yield and quality of blackgram and economics of fertilizer application to blackgram variety KM-1 revealed that the grain yield was significantly increased by increase in the level of potash. The maximum grain yield of 1757 kg/ha was recorded at 30 kq K20/na. Though the levels of nutrients had no significant influence on protein content, grain protein yield was significantly increased with increase in the leve! of potash, giving the maximum grain protein yield of 410. 86 kg/ha with 30 kg K^O/ ha. The maximum net profit of Rs, 3693.30 was also obtained from the plot which received 30kg KaO/ha.
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    Effect of potassium and rhizobial inoculation on growth, yield and quality of soybean in the sandy clay loam soils of Kerala
    (Kerala Agricultural University, 1982) Reena Grittle Pinhero; Tajuddin, E; Abdul Salam, M; Vikraman Nair, R
    An experiment wasconducted at the Instructional Farm attached to the College of Horticulture, Vellanikkara to study the effect of potassium and rhizobiai inoculation on growth, yield and quality of soybean. The study revealed that applied potassium and rhizobiai culture inoculation did not significantly influence growth characters, yield components, seed yield and stoveryield. Protein content and oil content were significantly influenced by levels of potassium and inoculation. The highest oil content was recorded by 120 kg K20/ha and the highest protein content was obtained without application of potassium. Inoculation increased the protein content and decreased the oil content of seeds. Studies on residual effects of treatments during 2nd crop season revealed that there was no marked variation in seed yield.
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    Nutritional requirement of green gram (Vigna Radiata (L.) Wilczek) grown in rice fallows
    (Kerala Agricultural University, 1981) Savithri, K E; Nair, K P M; Oommen, M; Abdul Salam, M
    A field experiment to study the effect of three graded levels each of nitrogen (20, 30 and 40 kg/ha), phosphorus (30, 45 and 60 kg Pa05/ha) and potash (10, 20 and 30 kg K20/ha) on the yield and quality of green gram variety, Pusa Baisakhi grown in rice fallows of the Instructional Farm, College of Agriculture, Vellayani, Trivandrum has shown that the grain yield was significantly increased by highest level of potash over the lowest level and bhusa yield by highest level of nitrogen over the lower levels. Levels of nutrients had no significant influence on grain protein content, but highest level of potash significantly increased the grain protein yield over the lowest level. In the case of protein content of bhusa, higher levels of potash showed an adverse effect whereas fodder protein yield was not significantly affected by the treatments.
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    Root activity of rice as influenced by zinc application
    (Kerala Agricultural University, 1987) Abdul Salam, M; Subramanian, S