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

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    Nutritional requirements of winged bean [Psophocarpus tetragonolobus(L.)DC. ]
    (Department of Agronomy, College of Agriculture, Vellayani, 1984) Brillin, C; Pushpangadan, K
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    Studies on the performance of rice variety 'Aswathy' under different methods of direct seeding and weed control
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1979) Sreedevi, P; Balakrishna Pillai, P
    An experiment was conducted in the Rice Research Station and Instrumentation farm, Mannuthy, Kerala Agricultural University during the first crop season of 1978 to study the performance of a rice variety 'Aswathy' under different methods of direct seeding and weed control.
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    Carbon storage potential of intensive silvopasture systems in humid tropics of kerala
    (Academy of Climate Change Education and Research, Vellanikkara, 2016) Varsha, K M; Asha K Raj
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    Effect of date of sowing and levels of irrigation on the growth and yield of bitter gourd variety priya
    (Department of Agronomy, College of Horticulture, Vellanikkara, 1986) Sarah Jacob; Balakrishnapillai, P
    Effect of date of sowing and levels of irrigation on the growth and yield of bittergourd variety Priya. An experiment was conducted at the Pepper Research Station, Vellanikkara during the summer months of 1984 -85 to study the effect of date of sowing and levels of irrigation on the growth and yield of bittergourd, variety Priya. The experiment was laid out in split plot design with three replications. The treatments consisted of seven dates of sowing (December 1st, December 16th, December 31st, January 15th , January 30th, February 14th and March 1st), in the main plot and five levels of irrigation (IW/CPE = 1, IW/CPE = 0.75, IW/CPE + 0.50, conventional irrigation and pitcher irrigation) in the sub plot. The biometric observations of the crop growth characters, flowering and yield attributes were taken at different stages of development of the crop. Soil moisture studies were undertaken before and 24 hours after each irrigation. The observations on weather elements were recorded daily. Irrigation at IW/CPE ratio I was significantly superior to others with regard to date and number of female flower production, number of fruits, fruit length and girth, yield, total dry matter production. The conventionally irrigated plants showed maximum vine length, flesh thickness and fruit weight. The December sown plants were superior to others with regard to most of the crop characters. The crop weather relationship studies showed that the maximum temperature during the first 10 weeks, the minimum temperature during 7th to 11th week and relative humidity during 6th to 13th week were negatively correlated with both total yield and number of fruits per plant. While there was positive correlation between sunshine hours during 6th to 13th week and the yield characters. It was found that irrigation and sowing date had a significant effect on overall growth and yield of the crop. The highest yield of the crop was recorded in plots irrigated at IW/CPE + 1 and sown on December 1st. The best performance was attributed to the optimum weather condition during the crop period and the effective utilization of water. From the soil moisture studies it is evident that the consumptive use increased with the frequency of irrigation. The top 15 cm of the soil layer accounted for the highest soil moisture depletion. The depletion was more from the deeper layers in drier regimes. The water use efficiency was highest for the plants irrigated at IW/CPE = 0.5, sown on December 1st. Results of the present investigation indicate that bittergourd can be raised successfully during the summer months if irrigated at IW/CPE ratio I and sown on December 1st.
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    Input optimization for medicinal rice (Oryza sativa L.) cv. Njavara.
    (Department of Agronomy, College of Agriculture, Vellayani, 2011) Sriramkumar, N; Geethakumari, V L
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    Field evaluation of commercial organic manuals and growth promoters in bush type vegetable cowpea (Vigna unguiculata subsp. sesquipedalis)
    (Department of Agronomy, College of Agriculture, Vellayani, 2005) Deepa, S; Sukumari, P
    In a field study conducted in the college of Agriculture, Vellayani, three commercial organic manures viz. Haritha Super (4.0: 4.4 : 2.0 NPK), Poabs Green (2.7 : 1.2 : 2.0 NPK) and Bharath Meal (1.5 : 2.2 : 2.5 NPK) were compared with FYM (1.0 : 0.4 : 0.5 NPK) and Enriched Vermicompost (2.0 : 1.25 : 1.0 NPK) as the organic component of integrated nutrient management in bush type vegetable cowpea in combination with and without two growth promoters viz. Panchagavyam and Vermiwash. Feasibility of using the commercial organic manures as an alternative for FYM was also looked into. All the organic manures tested in the field experiment (FYM, Haritha super, Poabs Green, Bharath Meal and Enriched Vermicompost) were applied on Nitrogen equivalent basis in accordance with Package of Practices (POP) recommendation of Kerala Agricultural University (KAU). The POP recommendation for bush type vegetable cowpea is 20 t FYM + 20 : 30 : 10 kg NPK ha-1. When FYM was substituted with other organic manures on nitrogen equivalent basis P and K supplied by these organic manures were accounted for while calculating the quantity of inorganic phosphatic and potassium fertilizers to be applied in each treatment. Germination percentage in the various treatments ranged between 97.66 to 99 per cent and it did not vary significantly. All the significantly influenced growth characters such as height of plant, number of primary branches per plant, LAI and dry matter production recorded maximum values in Enriched Vermicompost applied crop and least values in Haritha Super applied crop. Yield attributing characters in vegetable cowpea significantly influenced by organic manures include number of flowers and number of pods per plant, fresh weight of pod and length of pod. All the significantly influenced yield attributing characters recorded superior value for Enriched Vermicompost. Enriched Vermicompost was found to be significantly superior with respect to total and marketable crop yield. Among the quality parameters crude protein content of pod was significantly superior for Enriched Vermicompost. Haritha Super produced pods of lowest protein content. Shelf life of pods in Enriched Vermicompost and Bharat Meal were the same and was 14 per cent higher than that in FYM. N and P uptake were superior for Enriched Vermicompost where as K uptake in Enriched Vermicompost and Bharat Meal were on par and superior to other organic manure treatments. Post harvest available N and P2O5 content of soil was highest in Haritha Super treated plots which was significantly higher than all other organic manures. Post harvest available K2O status was the highest in Poabs Green compared to all other organic manures. Among the growth promoters, Panchagavyam was significantly superior to Vermiwash with respect to characters such as days to 50 per cent flowering, marketable yield, percentage pest incidence, post harvest N and organic carbon content of soil. Panchagavayam and Vermiwash were on par with respect to number of flowers per plant at 30 and 60 DAS, protein content of pods, crop uptake of N and K. Both the growth promoters were significantly superior to water spray in their influence on days to 50 per cent flowering, number of flowers per plant at 30 and 60 DAS, percentage pest incidence, protein content of pods, N and K uptake and post harvest soil organic carbon content. Significant interaction effects were obtained in the case of number of flowers per plant at 60 DAS, marketable yield, percentage pest incidence and organic carbon content of soil after the experiment All the organic manures, growth promoters and their interactions had significant influence on Benefit Cost Ratio (B: C). Among the organic manures B: C in Enriched Vermicompost was the maximum. Among the growth promoters B: C in Panchagavyam (1.04) was the maximum. Maximum B:C was recorded in the treatment combination M5G2 (Enriched Vermicompost + Panchagavyam) (1.68) which was on par with M5G3 (Enriched Vermicompost + Vermiwash) (1.48 ), M1G2 (FYM + Panchagavyam) ( 1.56) and M1G3 (FYM + Vermiwash) ( 1.51). The treatment combination M2G1 (Haritha Super + Water Spray) recorded the least B:C ( 0.39 ) From the growth and yield point, FYM can be substituted with the commercial manures such as Haritha Super, Poabs Green and Bharath Meal. But FYM is more desirable from the economic point. Among the five organic sources tested Enriched Vermicompost is the best organic component of integrated nutrient management both in terms of yield and economics of production. Panchagavyam is a better growth promoter than Vermiwash in regulating marketable yield of vegetable cowpea.
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    Nutrient management of upland rice (Oryza sativa L.) varieties in coconut garden
    (Department of Agronomy, College of Agriculture, Vellayani, 2001) Anu, S; Jayakrishnakumar, V
    A field experiment was conducted at the Instructional Farm of the College of Agriculture, Vellayani during the first crop season of 2000 to study the nutrient management of upland rice varieties in coconut garden. The experiment was laid out in 3 x 3 x 2 asymmetrical confounded factorial design with 2 replications. The treatments included 2 varieties (Swarnaprabha and Mattatriveni), three levels of nitrogen (40, 60, 80 kg ha') and three levels of potassium (15, 30, 45 kg ha"). Results of the experiment revealed that the varieties and different levels of nitrogen and potassium had significant influence on most of the biometric and yield attributing characters of upland rice. Fertilizing the crop at 80 kg N ha": and 45 kg K20 halwas found to significantly influence the biometric and yield attributes. Among the varieties, Mattatriveni was superior to Swarnaprabha in most of the biometric and yield attributing characters. The quality characters like proline content, protein content and chlorophyll content were significantly influenced by the highest levels of nitrogen and potassium. Mattatriveni recorded the highest protein content and Swarnaprabha recorded the maximum proline content. The uptake of nutrients was profoundly influenced by the different treatments.Increaseduptake of nutrients was recorded at higher levels of nitrogen and potassium. Mattatriveni registered the highest uptake of nutrients at all growth stages. Increasing the levels of nitrogen and potassium increased the soil available nutrients. Plots grown with Mattatriveni registered the highest values for soil available nitrogen and potassium. The results of the economic analysis revealed that BeR was maximum with the highest levels of N (80 kg ha") and K (45 kg ha-1). The varieties did not differ in the benefit cost ratio.