1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)
Permanent URI for this communityhttp://localhost:4000/handle/123456789/1
Browse
5 results
Search Results
Item Fertiliser management in cassava- Groundnut intercropping system(Department of Agronomy, College of Horticulture, Vellanikkara, 1985) Bridgit, T K; Sreedharan, CAn experiment was conducted at Agricultural Research Station, Mannuthy, to study the effect of levels of N and time of application of N and K in a cassava- groundnut intercropping system. This 2x2x4 factorial experiment was laid out in randomized Block design with three replications under rainfed conditions. The study revealed that intercropping cassava with groundnut enhanced the growth parameters of cassava at all stages of growth. Yield attributes, yield and total drymatter production of cassava were also increased by intercropping. The quality characters like drymatter starch and crude protein content of tubers were improved by intercropping. Hundred percent recommended dose of N increased the growth, yield and quality over 75 percent of the recommended dose. Among the time of application T3 (15, 75 and 120 DAP) has given the highest tuber yield (21.92t ha-1) followed by T1 (15,60 and 90 DAP) of 21.65 t ha-1. T4 (basal, 60 and 90 DAP) which is the recommended dose recorded the lowest yield of 17.9 t ha-1. A comparatively higher utilization index was obtained with intercropping and higher level of N (75kg ha -1). T1 andT1 and T3 recorded more UI values than T2 and T4. The nutrient content as well as up take in cassava was increased by legume intercropping and higher levels of N. T1 and T3 recorded more nutrient content in different plant parts as compared to T2and T4. The fertility status of the soil was improved by intercropping and levels of N. Yield of ground nut was influenced by higher levels of N. Yield of groundnut was influenced by higher levels of N and time of application of N and K to cassava.T2 and T4 recorded more yield. Nutrient content and up take of bhusa was not influenced by levels of N and time of application of N and K. Maximum LER was seen in sole cassava plot when N and K was given at 15,75 and 120 DAP while in intercropped plot it was highest when N and K were given at 15,60 and 90DAP. Income from cassava cultivation was increased by intercropping with groundnut application of N and K at 15, 75 and 120DAP. Groundnut can be intercropped successfully with cassava under Kerala condition and a substantial quantity (25 per cent) of fertilizer nitrogen required by the main crop could be saved by this practice. For getting better fertilizer use efficiency of applied N and K fertilisers, 1st dose should be applied at 15 DAP of cassava instead of the now recommended basal Dose. Second dose can be extended up to 75 days of planting and the last dose up to 120 DAP so as to coincide with the harvest of the intercrop and the earthing up of cassava.Item Studies on foliar diagnosis, yield and quality of Tapioca (Manihot utilissima Pohl.) in relation to nitrogen and phosphorus(Division of Agricultural Chemistry, Agricultural College and Research Institute, Vellayani, 1968) Vijayan, M R; Subramonia Aiyer, NAn investigation was carried out at the Agricultural College and Research Institute, Vellayani during the year 1966-68 to evolve a suitable diagnostic technique for the nutritional status of nitrogen and phosphorus in two varieties of tapioca (M-4 and H-105) by foliar analysis. The response of the two varieties to graded doses of nitrogen (0.75 and 150 kg. N/ha.) and phosphorus (0.50 and 100 kg. P2O5/ha.) and their interaction in relation to the pattern of uptake, yield and quality of tubers were also investigated. Potassium and calcium were kept constant at 250 kg and 1200 kg. per hectare respectively. A split - plot experiment in R.B.D. with three levels each of nitrogen and phosphorus in factorial combinations as major treatments and with the two varieties as minor treatments, was laid out. Leaf leminae and peticles each grouped into three morphological categories. were used for testing the suitability for the diagnostic analysis. The plant part thus standardised (reflect) was analysed at three stages of growth for nutrient content. Biometric observations were recorded at three stages of growth. Yield components and quality factors of tuber were assessed in relation to nutrition of the plants.Item Potash nutrition of tapioca (Manihot esculenta Crantz.)(Department of Agronomy, College of Agriculture, Vellayani, 1982) Muraleedharan Nair, V; Sadanandan, NAn investigation was undertaken at the College of Agriculture, Vellayani and Rice Research Station, Kayamkulam for two years during 1977-79 to study the performance of tapioca (Var. Sree Sahya) under two different agroclimatic conditions. The treatments consisted of three levels of nitrogen (50, 125 and 200 kg N/ha) and three levels of potassium (50,125 and 200 kg K2O/ha) at three times of application. The experiment was laid out in a 3 partially confounded factorial design with two replications.Item Magnesium sulphate fertilization for yield enhancement in direct seeded rice(Department of Agronomy, College of Agriculture, Vellayani, 2018) Daly George; Girija Devi, LItem Effect of different levels of nitrogen and potash on the growth, yield and quality of tapioca variety, H-165(Division of Agronomy, College of Agriculture, Vellayani, 1975) Natarajan, M; Sadanandan, NAn experiment was conducted at the College of Agriculture, Vellayani, with the object of studying the effect of different levels of nitrogen (50, 100 and 150 kg H per hectare) and potash (50 100 and 150 kg KgO per hectare) on the growth yield end quality of a high yielding variety of tapioca H-165. The experiment was carried out in a 5 factorial Randomised Block Design with four replication Nitrogen and potash were supplied in the form of ammonium sulphate and muriate of potash respectively. The results of the experiment are summarised hereunder:- 1. Basal dressing of nitrogen and potash increased the number of leaves and plant height. 2. Different levels of nitrogen significantly increased the number of leaves in the early stages of growth. The maximum number of leaves wee recorded a t 120th day after planting a t 150 kg H/hectare. 3. Nitrogen significantly increased the plant height at all stages of growth. The maximum height was recorded at harvest with 150 kg N/hectare. 4. There was increase In the number of leaves on 90th and 120th day after planting due to potash application. Maximum number of leaves was produced on 120th day after planting by 150 kg K2O per hectare. 5. The different levels of potash increased the plant height at all stages of growth except at 50th day after planting. She maximum height was recorded at harvest with 150 kg per hectare.