Browsing by Author "Ushakumari, K"

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Characterization and evaluation of herbal and non herbal kunapajala on soil health and crop nutrition
(Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 2019) Kavya, S R; Ushakumari, K
Characterization and evaluation of on-farm liquid organic manures on soil health and crop nutrition
(Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 2017) Sreya U Parvathi; Ushakumari, K
Effect of soil and foliar application of vermiwash on growth , yield and quality of tomato
(Department of Soil Science and Agricultural Chemistry,College of Agriculture, Vellayani, 1999) Rani Jasmine; Ushakumari, K
Effect of vermicompost enriched with rock phosphate on cowpea
(Department of Soil Science and Agricultural Chemistry,College of Agriculture, Vellayani, 1999) Sailajakumari, S; Ushakumari, K
An investigation was carried out at the College of Agriculture, Vellayani during 1998 to evaluate the effect of vermicompost enriched with RP on P availability yield and quality of cowpea and the feasibility of reducing the inorganic P. The variety used was Kanakamoni. All the growth characters, yield and yield attributes studied were significantly influenced by different treatments. Nodule number per plant, weight of nodules per plant and root shoot ratio were maximum by the application of enriched vermicompost. Yield attributes like number of pods per plant, number of seeds per pod and hundred seed weight and total grain yield were significantly increased by the application of enriched vermicompost. Vermicompost primed with full RP or with half RP produced no significant difference in grain yield. Thus the results revealed that inorganic phosphoate for cowpea coufd be reduced to half• of its recommended dose by priming vermicompost with RP. Analysis of plant samples at harvest showed that maximum content of macronutrients except Mg was recorded by enriched vermicompost. It showed its superiority over other treatments for protein and P content of grain. Enriched vermicompost also registered significant increase in soil available N, P and K after the experiment. ./ 2 Uptake of macronutrients was significantly influertced by different treatments. Enriched vermicompost registered maximum mean value for the uptake of all the macro nutrients. Priming of vermicompost with full RP or with half RP produced no significant difference in uptake of any macro or micronutrients. Grain yield was positively and significantly correlated with the growth characters. Yield and yield attributes showed positive and significant correlation with nutrient uptake. The study indicated the superiority of vermicompost enriched with RP on yield and quality of cowpea. P recommendation for cowpea can be reduced to half by priming vermicompost with RP.
Effect of vermicompost enriched with rock phosphate on the yield and uptake of nutrients in cowpea (Vigna unguiculata [L. ] Walp)
(Kerala Agricultural University, Vellanikara, 2002) Sailaja Kumari, M S; Ushakumari, K
A field experiment was conducted in a Rhodic Haplustox during 1997-98 to study the effect of enriched vermicompost on the yield and uptake of nutrients by cowpea. Among the different treatments tried, enriched vermicompost showed its superiority over other treatments for yield and uptake of major nutrients like N, P, K, Ca and Mg. But the micronutrient uptake was not significantly influenced by any of the treatment.
Efficiency of vermicompost on growth and yield of summer crop Okra (Abelmoschus esculentus moench)
(Kerala Agricultural University, 1999) Ushakumari, K; Prabhakumari, P; Padmaja, P
Evaluation of mineral enriched composts for soil remineralisation and crop nutrition
(Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 2015) Sreeja, S V; Ushakumari, K
Infiltration and moisture retention of five major soil groups of Kerala
(Kerala Agricultural University, 1987) Ushakumari, K; Leela, K; Anilkumar Sharda
Laboratory and field experiments were conducted to evaluate the soil water retention and infiltration rates, respectively, for five major soil groups of Kerala, namely, laterite, black, red loam, riverine alluvium and coastal alluvium. Black soils were found to retain more water whereas coastal alluvium retained the minimum at different soil water tensions. So, was true of their available water status_ (nfilttation rates were higher in the case of coastal alluvium red loam and laterite soils. Black soils exhibited rather low values of infiltration rates.
Low cost technology for the collection of vermiwash in homesteads
(Kerala Agricultural University, 1998) Padmaja, P; Ushakumari, K; Prabhakumari, P
Organic nano NPK fomulations for enhanching soil health and productivity
(Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 2019) Nibin, P M; Ushakumari, K
Organic nutrition for soil health and productivity of chilli (Capsicum annuum L.)
(Department of Soil Science and Agricultural Chemistry,College of Agriculture,Vellayani, 2011) Lekshmi, V; Ushakumari, K
Structural status in relation to physico-chemical characteristics of soil
(Kerala Agricultural University, 1987) Ushakumari, K; Leela, K; Anilkumar Sharda
The influence of physico-chemical properties of soils on the soil structure of five major soil groups of Kerala namsly leterite, black, red loam, riverine alluvium and coastal alluvium was studied. Black soils have distinctly superior aggregation in comparison to rest of the soils under investigation. Some of the physicochemical properties like clay, organic matter, CEC and sesquioxide play an important role in building soil structure in most of the soil groups except riverine alluvium. This is because of the comparatively recent origin of riverine alluvium soils.
Vermi compost enriched with organic additives for sustainable soil health
(Department of Soil Science and Agricultural Chemistry College of Agriculture, Vellayani, 2004) Sheeba, P S; Ushakumari, K
Vermicompost as a potential organic source and partial substitute for inorganic fertilizers in sweet potato (Ipomoea batatas (L.) Lam.)
(Department of Soil Science and Agricultural Chemistry,College of Agriculture, Vellayani, 1998) Suresh Kumar, S N; Ushakumari, K
An investigation entitled "Verrnicompost as a potential organic source and partial substitute for inorganic fertilizers in sweet potato (Ipomoea batatus (L) Lam)" was carried out at the Instructional Farm, College of Agriculture, Vellayani during the period December 1995 to April 1996. The main objectives of the study were to study the efficiency of vermicompost as an organic manure, the extent to which inorganic fertilizers can be substituted when vermicompost was used as an organic source and the feasibility of reducing the dose of vermicompost. The experiment was laid out III randomised block design with seven treatments and four replications. The treatments consists of package of practices recommendations of Kerala Agricultural University for sweet potato (cattle manure + inorganic fertilizers) and vermicompost as organic source with graded doses of inorganic fertilizers. The growth parameters like vine length and number of branches did not show any significant variation. However highest vine length and number of branches are noticed in treatment which received vermicompost as a sole source of nutrient. Significant difference was observed in vine yield and highest vine yield was obtained when vermicompost was given as a sole source of nutrients. Yield attributing characters like length and girth of tubers and number of tubers did not show any significant variation. With respect to mean tuber weight and tuber bulking rate, the treatment differed significantly and maximum effect was observed when vermicompost was applied along with half the recommended dose of inorganic fertilizers. Significant treatment effect could be observed in total tuber yield and marketable tuber yield. Vermicornpost with half or 3/4th NPK produced highest yield. From this it could be deduced that by using vermicompost as organic manure in sweet potato, it is possible to bring down the usage of chemical fertilizers. Half or 3/4th dose of vermicompost along with recommended dose of inorganic fertilizers was equally effective as that of package of practices recommendations of Kerala Agricultural University (cattle manure + recommended inorganic fertilizers) in yield and yield attributes of sweet potato. The nitrogen and phosphorus content in the leaves and vmes did not show any significant difference by applying various treatments. But in tubers the nitrogen content was maximum when 1/2 inorganic fertilizers + organic manure as vermicompost was applied. The phosphorus accumulation in tuber was maximum in the combination of full inorganic fertilizers + organic manure as cattle manure was given. The treatment combination of full inorganic fertilizers + organic manure as vermicompost resulted m maximum accumulation of phosphorus in leaves, vines and tubers. Regarding calcium, magnesium and iron contents of leaves, vines and tubers there was no significant difference among various treatments. The application of full inorganic fertilizers + organic manure as vermicompost produced maximum manganese concentration in leaf and tuber. The starch content of tubers showed a decreasing trend with the reduction in the quantity of inorganic fertilizers. But by reducing inorganic fertilizer levels, the reducing sugar percentage increased. The crude protein, crude fibre and carotene contents showed the same trend as that of reducing sugar. The plant uptake of nitrogen, phosphorus and potassium was maximum when 112 inorganic fertilizers + organic manure as vermicompost was applied. The organic carbon level after the crop showed significant difference among various treatments. The maximum organic carbon percentage was noticed when nitrogen as vermicompost + organic manure as vermicompost was given. The growth characters like vine yield, number of branches were negatively correlated with yield. The yield components like number of tubers per plant, tuber weight, uptake of nitrogen, phosphorus and potassium showed positive correlations with yield. The economics worked out show that the highest net profit was obtained when 1/2 inorganic fertilizers + organic manure as vermicompost was given. The cost of cultivation while applying this treatment was minimum and it showed a B C ratio of 2.53.