1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)

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    Nutritional status of soils in relation to foliar nutrient levels in oil palm
    (Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 1988) Solomon Chacko; Abdul Hameed
    An investigation was taken up in oil palm grown in the plantation of oil palm India Limited at Yeroor (Bharathipuram) of Quilon District, with a view to evaluating the nutritional status
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    Deficiency symptoms of mineral nutrients in clove (Syzygium aromaticum (L.) Merr. and Perry).
    (Department of Plantation Crops and Spices, College of Horticulture, Vellanikkara, 1989) Nazeem, P A; Sivaraman Nair, P C
    Experiments were conducted at the College of Horticulture on nutritional aspects of clove, to study the nutrient deficiency symptoms as well as the distribution pattern of nutrients in starved clove plants. The deficiency symptoms were induced in clove seedlings in sand culture. The distribution pattern of P, S (anions) and Ca (cation) were studied in the nutrient-starved seedlings employing radio isotopes. Besides, the annual nutrient removal and the seasonal fluctuations in the foliar nutrient concentration were studied in bearing clove trees. Older leaves were the first to exhibit 'hunger signs' due to the stress induced by N, P, K and Mg starvation whereas the symptoms, were manifested on the younger growth due to deficiency of Ca, S, Fe, Mn, Cu, Zn and B. General yellowing of the older leaves and early defoliation were the symptoms expressed by N-starved plants. Phosphorus stress resulted in small brownish spots to appear on older leaves of clove seedlings which later coalesced to form necrotic patches.
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    Fertility investigations on the soils of South Kerala in relation to their physiographic positions
    (Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 1986) Wilfred Godwin, G; Alice Abraham
    A study of the soils of South Kerala has been undertaken to investigate the variation in fertility status in relation to their physiographic position. Twelve locations from the districts of Trivandrum and Quilon were selected and from each location soil samples from upper, middle and lower reaches were collected from depths of 0 to 20 cm and 20 to 40 cm. The elevation of the location varied from 20 to 150 meters and the degree of slope from 6 to 27. The lower reaches of all the location were or less level paddy fields. The middle reaches were cultivated to banana, pepper, coconut and tapioca and the upper reaches in addition to the above crop perennials like coconut and rubber.
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    Nutritional status of soil and plant in relation to the incidence of chenthal disease of cardamom
    (Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 1983) Dileep Kumar, K N; Alice Abraham
    An investigation was carried out at the College of Agriculture, Vellayani, to study the nutritional status of soil and plant in relation to the incidence of chenthal disease in three major cultivars of cardomom viz., Vazhukka, Malabar and Mysore. Soil and plant samples for the study were collected from the cardamom plantations in the High Ranges of Idukki district of Kearala State during March, 1982 (Pre-monsoon period) and September, 1982 (Post-monsoon period)
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    Potash nutrition of rice with regard to the effect of Calcium, Magnesium and Silicon
    (Division of Chemistry, Agricultural College & Research Institute, Vellayani, 1966) Usha, C; Verghese, E J
    The study of potash nutrition of rice for maximum economic yields of grain and straw of high quality has not so far received adequate attention. In recent years, however, the use of potash in rice production has made remarkable progress in Japan and in India. But sufficient data are not yet available with regard to the need for potash manuring of Rice in Kerala. It is well known that rice soils of Kerala are very poor in lime status due to high rainfall obtained in the State. It has been found that liming affects the available potash contents in the soils.
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    Studies on the effect of silicate fertilization on the uptake of nutrients by rice plant at different stages of growth
    (Division of Agricultural Chemistry, Agricultural College and Research Institute, Vellayani, 1965) Sadanandan, A K; Verghese, E J
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    Relative efficiency of soil and foliar applied nutrients in irrigated rice of Palakkad
    (Department of Agronomy, College of Horticulture, Vellanikkara, 2013) Nissa Latheef; Mercy George
    The research programme entitled “Relative efficiency of soil and foliar applied nutrients in irrigated rice of Palakkad” was conducted in the farmer’s field, Thathamangalam, Palakkad during Mundakan season October 2011- February 2012 to compare the efficacy of soil and foliar applied nutrients especially magnesium, zinc and boron. The treatments included package of practices recommendation for rice manuring (POP NPK+FYM), NPK alone as in the package of practices recommendation (POP NPK), soil test based nutrient application +FYM, soil application of MgSO4 @ 40 & 80 kg ha-1, ZnSO4 @ 20 & 30 kg ha-1, Borax @ 10 & 20 kg ha-1; foliar spray of MgSO4 @ 0.5 & 1%, ZnSO4 @ 0.5 & 1% and Borax @ 0.25 & 0.5% and an absolute control. Soil application of Mg, Zn and B were done as basal and foliar application were given at 20 and 40 DAT of rice as per the treatments.