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ThesisItem Open Access Growth and yield of cashew in relation to foliar and soil nutrient levels(Department of Agronomy, College of Horticulture, Vellanikkara, 1992) Latha, A; KAU; 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 .ThesisItem Open Access Utilization of biogas technology by the farmers of Palakkad(Department of Agricultural Extension, College of Horticulture, Vellanikkara, 1990) Latha, A; KAU; Muraleedhara Prasad, RA - study \/as undertaken to analyse the extent of utilization of biogas technology by the farmers of Palakkad district of Kerala State in relation to their attitude, perception and motivational pattern in the adoption of biogas technology. The respondents selected for study included both users (n = 80) and non-users (n - 80) of biogas technology. The study revealed that there was no significant difference in the attitude of users and non-users towards, biogas technology. Among the six attributes of biogas technology studied in relation to perception, simplicity obtained the highest rank -followed by fuel efficiency, profitability, fertilizer efficiency, need compatibility and lot; cost in that order. 'Safety' was indicated as the most important motive governing the adoption of biogas technology and prestige motive, the least important. Among the selected.independent variables, utilization of interpersonal sources of information, perception about the efficiency of biogas technology, indebtedness, utilization of ether sources of fuel and innovation proneness were found .significant in predicting the maximum variation in attitude of users towards biogas technology, while utilization of interpersonal sources of information, family educational status,social participation; availability of other sources of fuel and educational status were important in predicting the attitude of non-users. Utilization of interpersonal sources of information, utilization of other sources of fuel, indebtedness, livestock possession and educational status were found significant in predicting the perception of users about the efficiency of biogas technology. 'Mixing slurry everyday is a botheration' was expressed by users as the most important constraint in utilization of biogas technology followed by low gas production during monsoon' and 'need for constant care of the plant. Most of the non-users had not adopted the technology due to the botheration for maintenance of the plant, availability of plenty of firewood and high installation cost of the plant.