Browsing by Author "Sasidhar, V K"

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Agronomic evaluation of chemical and bio-agents on phosphorus dynamics in red loam soils of southern Kerala
(Department of Agronomy, College of Agriculture, Vellayani, 1995) Viswambharan, K; Sasidhar, V K
Balance sheet of available phosphorus in rice based cropping systems by phosphorus management
(Kerala Agricultural University, 1994) Annamma George; Sasidhar, V K
Comparative performance of soybean varieties in rice fallows
(Kerala Agricultural University, 1980) Sasidhar, V K; Sadanandan, N
Comparative performance of two rice varieties (IR 8 & PTB-9) with varying levels of seed rate and nitrogen under semi-dry conditions
(Kerala Agricultural University, 1978) Poulose, K C; George, C M; Sreedharan, C; Sasidhar, V K
Crop geometry studies in tapioca based intercropping system
(Department of Agronomy, College of Agriculture, Vellayani, 1984) Anilkumar, A S; Sasidhar, V K
An experiment was conducted at the College of Agriculture, Vellayani, during 1982-83 to study the effect of intercropping groundnut and cowpea with tapioca and to identify the most suitable spatial arrangement of crops in the tapioca and to identify the most suitable spatial arrangement of crops in the tapioca based intercropping system. The study also helped to find out the possibilities of changing the geometry of planting of tapioca from the normal method to the paired row pattern. The experiment with eight treatments was carried out in randomised block design with three replications under rainfed conditions.
Crude protein content of guinea grass and component crops under different spacings
(Kerala Agricultural University, 1979) Krishna Raj, P; Sadanandan, N; Nair, K P M; Sasidhar, V K
Different methods of growing rice in different seasons
(Kerala Agricultural University, 1988) Joseph, P A; Sasidhar, V K; Aravindakshan, K; Babylatha, A K; Pushpakumari, R
Economics of inter cropping in guinea grass (Panicum maximum J.)
(Kerala Agricultural University, 1979) Krishnaraj, P; Sadanandan, N; Nair, K P M; Sasidhar, V K
Economics of phosphorus management in a rice based cropping system
(Kerala Agricultural University, 1994) Sasidhar, V K; Annamma George
Effect of agro - techniques on soil loss ,surface run and soil moisture storage In hill slopes
(Department of Agronomy, College of Horticulture, Vellanikkara, 1980) Viswambharan, K; Sasidhar, V K
A field experiment was conducted at the Instructional Farm, Vellanikkara during September 1979 to May 1980 to study the effect of various Agro-Techniques on soil loss, surface runoff and soil moisture storage in hill slopes. The experiment was conducted with the main objective of studying the effect of groundnut intercropping as well as the different methods of planting of tapioca on reducing soil and water losses in hill slopes. The experiment was laid out in a Randomised Block Design with five treatments and four replications. The treatments consisted of (1) tapioca alone in mounds, (2) tapioca in mounds with groundnut as intercrop, (3) tapioca alone in ridges across the slope, (4) tapioca in ridges across the slope with groundnut as intercrop and (5) uncultivated bare fallow as a control. The experiment was conducted in field runoff plots of 24.3M x 2.7M size. The runoff from the field were collected directly into water proof polyethylene lined earthen tanks and measured after each rainfall. Only rainfalls more than 12.5 cm were taken for the purpose of the study. From the experiment it is observed that AIm index was better correlated with runoff as compared to other erosion indices. Similarly EI15 index was better correlated with soil loss. Maximum runoff and soil loss occurred in uncultivated bare fallow. Among the various cultivation methods, tapioca in mounds registered maximum soil and water losses. Groundnut intercropping as well as tapioca planting in ridges across the slope were effective in reducing soil and water losses. Uncultivated bare fallow runoff plots recorded the maximum losses of N,P and K being 107.47kg, 28.476kg, and 82.479kg/ha respectively. Among the Agro-Techniques, tapioca in mounds recorded the maximum loss of N,P and K being 44.01kg, 14.845kg and 39.08 kg/ha respectively during the entire season. However, the nutrient losses from other plots were meagre. Maximum retention of rainfall was recorded by tapioca in ridges across the slope with groundnut as intercrop. The pH and conductivity of runoff water were not significantly influenced by different treatments. During the dry periods maximum storage and minimum depletion of sub soil moisture were recorded by uncultivated bare fallow plot. The growth and yield of tapioca were not significantly affected by the groundnet intercrop. Maximum yield of tapioca was recorded by the treatment of planting tapioca in ridges across the slope without intercrop. The yield of the intercropped groundnet was not affected by various cultivation methods of tapioca.
Effect of applied phosphorus and potassium and spacing on the available phosphorus and potassium and total nitrogen content of soil under lab lab
(Kerala Agricultural University, 1971) Sasidhar, V K; George, C M
Effect of copper and zinc on the nutrition of rice plant
(Kerala Agricultural University, 1983) Sasidhar, V K; Hassan, M A; Santhakumari, G
Effect of different levels of nitrogen and phosphorus on the uptake of phosphorus by rice variety - triveni
(Kerala Agricultural University, 1974) Alexander, K M; Sadanandan, N; Sasidhar, V K
A field experiment was undertaken during the third crop season of 1971 to study the effect of different levels of nitrogen and phosphorus on the uptake of phosphorus by the rice variety 'Triveni'. It was found that with increasing levels of nitrogen, the total uptake of phosphorus increased during all the growth stages of the crop. Similarly nitrogen phosphorus interaction significantly increased the phosphorus uptake at harvest. Different levels of phosphorus had no significant effect on the uptake of phosphorus during any of the growth stages of the crop.
Effect of different levels of phosphorus on the yield of rice variety 'Rohini' in Vellayani
(Kerala Agricultural University, 1971) Sasidhar, V K; Sadanandan, N
Effect of graded doses of nitrogen and phosphorus on the available phosphorus status of soil during various growth stages of rice
(Kerala Agricultural University, 1974) Alexander, K M; Sadanandan, N; Sasidhar, V K
Effect of graded doses of nitrogen, phosphorus and potassium on growth and yield of oriental pickling melon (Cucumis melo var. Conomon)
(Kerala Agricultural University, 1984) Hassan, M A; Sasidhar, V K; Peter, K V
A 33 factorial experiment with nitrogen (0,60, 120 kg/ha), P^ (0, 45, 90 kg/ha) and KaO (0, 45, 90 kg/ha) was laid out to find out optimum and economic levels of the above nutrients for maximising fruit yield in oriental pickling melon. Response to nitrogen was observed to be quadratic and the optimum level was calculated as 96.6 kg/ha and the economic level as 45.38 kg/ha. The P206 application produced no significant effects in melon for different characters studied. Response to K20 was linear.
Effect of levels of nitrogen and spacing on the yield of rice
(Kerala Agricultural University, 1981) Droupathi Devi, G; Vijayagopal, P D; Sasidhar, V K
Effect of slow release nitrogenous sources on growth and yield of rice variety: jaya
(Kerala Agricultural University, 1977) Oommen, M; Sadanandan, N; Mohammed Kunju, U; Sasidhar, V K
An investigation was carried out at the Model Agronomic Research Station, Karamana during the second crop season 1975 to study the comparative efficiency of different slow release nitrogen sources on growth, yield and yield contributing attributes of rice variety Jaya. All the slow release nitrogen sources were superior to ordinary untreated urea. Highest percentage of productive tillers was recorded by neem cake blended urea followed by AM treated urea. The weight of panicle was maximum in AM treated urea followed by neem cake blended urea. AM treated urea also gave the highest number of spikelets per panicle. Thousand grain weight, yield of grain and straw were maximum in AM treated urea followed by neem cake blended urea. AM treated urea gave an average yield of 4687kg/ha followed by neem cake blended urea which gave 4296kg/ha. The minimum grain yield of 2688kg/ha was given by untreated urea.
Effect of split application of potassium on the yield and yield attributing characters of rice variety 'triveni'
(Kerala Agricultural University, 1976) Sadanandan, N; Sasidhar, V K
An experiment was conducted at the Agricultural College and Research Institute, Vellayani, Kerala to study the effect of split application of potash on the yield of rice veriety 'Triveni' during the first and second crop seasons of 1972. It was found that there was no advantage by split dose application of potassium for the short duration variety of rice 'Triveni'. A single basal dose application of 20 kg K,O per hectare will be sufficient to get high yields.
Effect of split doses and time of nitrogen application on growth, yield attributes and yield of direct sown rice in puddled soil
(Kerala Agricultural University, 1979) Balachandran Nair, C K; Sreedharan, C; Sasidhar, V K
The result showed that at harvest there was no significant difference between treatments suggesting that the plant height was made up by the nitrogen supplied at larer stages. The treatment receiving half nitrogen at active tillering and the other half at panicle initiation stage recorded the maximum panicles/m2. Nitrogen application at later stages especially giving half at panicle initiation has resulted in maximum panicle weight and 1000 grain weight. Skipping basal application of nitrogen and applying half at active tillering and the other half at panicle initiation stage has given the maximum grain yield of 4874 kg/ha.