1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)
Permanent URI for this communityhttp://localhost:4000/handle/123456789/1
Browse
6 results
Search Results
Item Growth and yield of cashew in relation to foliar and soil nutrient levels(Department of Agronomy, College of Horticulture, Vellanikkara, 1992) Latha, A; John, P SAn experiment on the growth and yield of cashew in relation to foliar and soil nutrient levels was conducted during 1990-'92 by making use of seedling progenies of BLA-39-4 with three levels each of N (250, 500 and 1000 g /tree /year), P (125, 250 and 500 g P205 /tree /year) and K (250, 500 and 1000 g K2O /tree /year) and one absolute control (with out NPK application ). Significant response in increasing height and number of flushes was observed only for N (500 g /tree /year) and P (250 g P205 /tree / year). Leaf N and K content at flushing , flowering and fruiting were enhanced by application on of a ll the three nutrients with maximum values at flowering . Leaf P content was enhanced by N, P and K application only at flushing and fruiting . N, P and K application also increased the chlorophyll ‘ b 1 and total chlorophyll. There was increase In N and P content of soil by N, P and K application , while K content of s oil was increased only with higher levels of K. 2 The number of panicles/m and test weight of nuts and yield were increased by the application of N, P and K. A positive significant relationship was obtained between leaf N and P contents at flowering and fruiting stages and yield . There was progressive increase in nut volume , protein content of kernels and fruit characters such as fruit weight, fruit volume and TSS of apple by N, P and K application .Item Utilization of biogas technology by the farmers of Palakkad(Department of Agricultural Extension, College of Horticulture, Vellanikkara, 1990) Latha, A; Muraleedhara Prasad, RItem Standardization of media for tray nursery technique in rice(Department of Agronomy, College of Horticulture, Vellanikkara, 2015) Greeshma V Mathew; Latha, AItem Soil amelioration and nutrient management of rice in kole lands(Department of Agronomy, College of Horticulture, Vellanikkara, 2014) Shobha Rani, P; Latha, AThe study on "Soil amelioration and nutrient management of rice in Kole lands" was conducted during 2013-2014 at Ponnamutha Kole padavu of Venkitangu panchayath in farmer's field. The objective of the experiment was to study the effect of soil ameliorants and nutrients viz. K, Ca, Mg, B and Si on growth, n?trient uptake and yield of rice and to develop a nutrient management schedule for higher productivity of rice in Kole lands. The experiment was laid out in RED with three replications and there were twelve treatments comprising of soil test based nutrient package of NPK, nutrients as per Package of practice recommendations (POPR), different doses of K, individual applications of magnesium and boron, different sources of silica and combined application of nutrients and soil ameliorants. FYM, lime and silica were applied at the time of ploughing. Nitrogen was applied in three equal split doses, phosphorus as basal, potassium and boron in two equal split doses. Observations on growth characters, yield attributes and yield were recorded. Nutrient contents of plant and soil were determined using standard procedures. The growth characters of rice such as plant height, number of tillers, chlorophyll content and dry matter production were significantly improved by combined application of magnesium, boron and silica followed by application of silica as sodium silicate resulting in increased number of panicles/rrr' and number of spikelets/m/ and ultimately the yield and B:C ratio. Application of boron along with POPR also positively influenced all the yield attributing characters with highest per cent filled grains and increased yield. The nutrient content of major and micronutrients in plant Fe and Mn showed an increase over other treatments while Fe and Mn content decreased due to combined application of magnesium, boron and silica along with other nutrients as per POPR. Application of silica improved the soil nutrient status enabling increased uptake of nutrients and enhanced yield. The combined application of magnesium, boron and silica and individual application of boron and silica with POPR significantly influenced the pH, EC and available nutrient status of soil. The application of lime and silica had regulated the soil pH and decreased the Fe and Mn content of soil. The combined application of magnesium, boron and silica and individual application of silica as sodium silicate and boron along with FYM, NPK and lime as per paPR were found to be effective in ameliorating the harmful effects of Kole land soil which ultimately led to enhanced yield.Item Varietal reaction to nutrient and moisture stress in cashew (Aracardium occidentale L.)(Department of Agronomy, College of Horticulture, Vellenikkara, 1998) Latha, A; Abdul Salam, MFive experiments were conducted at Cashew Research Station, Kerala Agricultural University, Madakkathara during 1996-98 to identify drought tolerant varieties of cashew, to study the response of cashew to applied N at different levels of drip irrigation and to assess the tolerance of cashew varieties to N, P and K deficiency in soil. The abstract of the experiments is given below. Exp. I. Varietal variation in drought tolerance The varieties H-1591, M-26/2, V-5 and M-44/3 are drought tolerant and K-22-1 is drought sensitive. Exp. II. Response of cashew to applied N at different levels of irrigation (drip) N application @ 1500 g per tree per year along with irrigation @ 80 litres per tree per day (through drip) is essential in the state of Kerala for obtaining best results from cashew. Exp . lIl. Tolerance of cashew varieties to N dificient soils The varieties H-1591 and M-2612 are efficient for N deficient soils. The N use efficiency of cashew seedlings grown under pot culture was 24.7 per cent. Exp. IV. Tolerance of cashew varieties to P deficient soils H-1591 is an efficient variety for P deficient soils. The P use efficiency of cashew seedlings grown under pot culture was 8.02 per cent. Exp. V. Tolerance of cashew varieties to K deficient soils The varieties H-1591, M-26/2 and H-1598 are efficient for K deficient soils. The K use efficiency of cashew seedlings grown under pot culture was 12.17 per cent. N, P and K absorption of a six month old cashew seedling was in the order of 151.95 mg N, 21.58 mg P and 49.48 mg K per plant with a nutrient absorption ratio of7: 1:2 (approximately). The variety H-1591 is a super variety capable of tolerating not only drought but also N, P and K deficient soils. The variety M-26/2 is capable of tolerating drought as well as N and K deficiency in soils. The variety K-22-1 is drought sensitive.Item Consequences of conversion of marginal homesteads for planting rubber in Kottayam district(Department of Agricultural Extension, College of Horticulture, Vellanikkara, 1997) Latha, A; Ranjan S KarippaiA study was conducted in Kottayam district to find out the causes and consequences with respect to the nature, extent and conversion (composite index developed from nature and extent) of marginal homesteads for planting rubber. The respondents included 200 convertors and 100 non-convertors. The study revealed that outmigration of hired labour, availability of hired labour, farming experience and perception about attributes of rubber cultivation could explain the maximum discrimination between convertors and non-convertors. Among the eighteen independent variables selected, availability of family labour and number of crops emerged as the most important factors influencing conversion. Gross cropped area and number of crops could explain the maximum variability of conversion. Net area under rubber was the factor which exerted maximum influence on other variables effecting conversion. The most important consequences of conversion expressed by convertors were outmigration of hired labour, outmigration of family labour, soil loss (erosion) based on magnitude and decrease in water availability, increase in social status and decrease in water table based on directionality. Community based land use strategy which involved production and sharing of farm produce among groups of individual homesteads based on similarity of topography, soil type, water resource dependence, local needs may become inevitable to sustain and maintain the diverse requirements of local communities in place of conversion of homesteads to monocrops like rubber alone. Rubber could only become a part of such land use systems.