2. Institutional Publications
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Item Phosphate and potash fertilisation of rice in the clay loam soils of Kuttanad(Kerala Agricultural University, 1979) Ittyavirah, P J; Nair, S S; Sankara Panicker, K; John, P SA field experiment was conducted at the Rice Research Station, Moncompu to assess whether rice crop can be raised without continuous application of phosphorus and potash in the clay loam soils of Kuttanad. The variety used wasTriveni. Results revealed that skipping of potash during the alternate seasons is not affecting the yield, end hence csn be adopted for economising ihe expenditure. Skipping of phosphorus is having depressing effect on yieid. Application of nitrogen alone without phosphorus and potash has shown significant reduction in yield, and the crop exhibited typical symptoms of phosphate deficiency.Item Effect of potash nutrition on infestation by the yellow borer Tryporyza Incertulas(Kerala Agricultural University, 1980) John, P S; Thomas, M JItem Effect of calcium peroxide coating of rice seeds and water regimes on germination of rice seeds and weed growth(Kerala Agricultural University, 1986) Nair, M S; Sasidharan, N K; John, P SItem Effect of application of 2,4-Dd mixed with urea in low-land direct sown rice(Kerala Agricultural University, 1989) John, P S; Sadanandan, NItem Productivity of rice in relation to nitrogen management(Kerala Agricultural University, 1994) John, P S; Mercy George; Latha, AItem Productivity of cashew as influenced by chlorophyll and leaf nitrogen content(Kerala Agricultural University, 1994) Latha, A; John, P S; Mercy George; Krishnan, SItem Productivity of rice in relation to nitrogen management(Kerala Agricultural University, 1994) John, P S; Mercy George; Latha, AItem Effect of joint application of 2,4-D and urea on weed control in rice(Kerala Agricultural University, 1995) John, P S; Sadanandan, NIn a field experiment to study the efficiency of joint broadcast application of herbicide 2,4-D and fertilizer urea as compared to spraying 2,4-D and broadcasting urea in two separate operations, it was observed that both these methods are similar in weed control and rice yield. However, in the joint application the sprayer is not needed and the spraying cost, human energy and time spent for spraying are saved.Item Response of cashew to nutrient application in laterite soil(Kerala Agricultural University, 1996) Latha, R A; Mercy George; John, P SThe response of cashew grown in laterite soil to long term application of nutrients at different levels was studied in terms of yield attributing characters and yield. The quadratic response in yield observed with increasing levels of individual primary nutrients necessitated the estimation of optimum economic dose and were worked out to be 748 g N, 329 g P,O5 and 765 g K,O per tree per year.Item Combined application of green manure and amophos on P nutrition and yield of rice(Kerala Agricultural University, 1999) Pushpa Joseph; Mercy George; John, P S