Browsing by Author "Kamalam Joseph"

Now showing 1 - 9 of 9

Effect of chemical and integrated weed management in upland rice
(Kerala Agricultural University, 1993) Kamalam Joseph; Bridgit, T K
An experiment was conducted to study the effect of different weed management practices in upland rice in Kerala. The average reduction in grain yield due to weed competition was 44 per cent in 1988 and 56 per cent in 1989. During both the years weed free plots recorded grain yield on par with pre-emergence butachlor + 2,4-D at 25 to 30 days after rice emergence (DARE), pre-emergence pendimethalin and pre-emergence pendimethalin followed by either hand weeding once or 2,4-D application at 25 to 30 DARE. Weed control achieved by preemergence application of pendimelhalin followed by either a post emergence application of 2,4-D or hand weeding once was as effective as maintaining weed free condition throughout the crop growth. Weed control efficiency was higher in the case of pendimathalin when compared to thiobencarb and butachlor.
Effect of different planting methods and seed sizes on the growth and yield of colocasia (Colocasia Esculenta (L.) Schott)
(Kerala Agricultural University, 1981) Kamalam Joseph; Mohammed Kunju, U; Nair, K P M
A field experiment was conducted during 1978-79 at the Agricultural College Farm, Vellayani, Kerala, to study the effect of different methods of planting (pit, ridge and furrow) and sizes of planting materials (small cormels of 15-25 g, size, medium cormels of 35-45 g size, large cornrts of 55-65 g size and corms of 60-70 g size) on the growth and yield of colocasia (Colocasia escufenta (L.) Schott. Among the different methods of planting, furrow method hastened germination and increased the plant height, leaf area, LAI, average weight of corm and total tuber yield. Among the different sizes of planting material, larger size' groups hastened germination and increased the plant height. Average corm weight and total tuber yield were the maximum in the case of medium sized cormels.
Effect of mulching and size of seed materials on the tuber yield and quality of colocasia [Colocasia Esculent.A (L.) Schott]
(Kerala Agricultural University, 1981) Kamalam Joseph; Mohamed Kunju, U
Effect of mulching on the bulk density and water stable aggregates of soil
(Kerala Agricultural University, 1982) Kamalam Joseph; Mohamed Kunju, U
Fodder production potential of sweet potato (Ipomoea Batatas)
(Kerala Agricultural University, 1980) Raghavan Pillai, G; Kamalam Joseph; Sreedharan, C
Integration of organic and inorganic nutrient sources in transplanted lowland rice
(Kerala Agricultural University, 1994) Jose Mathew; Bridgit, T K; Kamalam Joseph
Long term effect of continuous fertilization by organic and inorganic sources on rice productivity
(Kerala Agricultural University, 1993) Anilakumar, K; Johnkutty, I; Kamalam Joseph
Pooled analysis of grain yield data for25 years (1961 to 1985) generated from a permanent manurial experiment with tall indica rice varieties revealed that during the first crop season (kharif), the treatment receiving combined application of cattle manure and NPK was significantly superior to others. The above treatment was on par with combined application of cattle manure, green leaves and NPK during the second crop season (rabi). The increases in yield by the former treatment over NPK alone were 7.6 and 5.6 per cent respectively during kharif and rabi seasons.
Losses of water from rice field through evapotranspiration and percolation during different seasons under shallow water table conditions
(Kerala Agricultural University, 1988) Kamalam Joseph; Havanagi, G V
Experiments were conducted in tha tank irrigated wet lands of th3 University of Agricultural sciences. Bangalore to study the evapotranspiration (ET) and ET/E at different stages of crop growth in rice during different seasons under shallow water table conditions. In ths light of the results obtained, it may be concluded that the seasonal ET in rice rangod from 45.23 to 57.12 crn undortank irrigation with shallow submergence of 5 to 1 cm standing water in ths field. Water usa and ET were comoarativaly more in tha first half of crop growth. The ET/E ratio for ths crop season ranged from 0.76 to 1.06.
Nutrient requirement of rice under Koottumundakan system
(Kerala Agricultural University, 1994) Bridgit, T K; Jose Mathew; Kamalam Joseph