Browsing by Author "Sannamarappa, M."
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Item Arecanut based cropping system in maidan parts of Karnataka(2007-02-08) Sannamarappa, M.Two high density multispecies cropping models consisting of pepper, cocoa, coffee, mulberry and elephant foot yam (Model-I) and banana, betelvine, lemon, coffee and tapioca (Model-II) were laid out in a 20 year old arecanut plantation during 1983-84. It is observed from the results of initial eight years that arecanut yield has increased by about 7 to 20 per cent in the arecanut based cropping systems. The yield of intercrops has also continuously and progressively increased as the years passed. In terms of net returns at the eighth year of experimentation, the systems produced Rs. 1,71,734/ha in the first model and Rs. 1,47,062/ha in the second model compared to Rs. 1,35,594/ ha and Rs. 1,40,612/ha in the arecanut monocrop respectively.Item Effect of green manuring on the production of arecanut(2007-02-08) Sannamarappa, M.Annual application of green leaf of arecanut palm is a commmon practice in Karnataka and Kerala. A field experiment was conducted at Central Plantation Crops Research Institute, Research Centre, Hirehalli from 1969 to 1972, to study the effect of growing six selected green manures crops in arecanut with reference to organic carbon status of soil and yield of arecanut. The yield of arecanut and the organic carbon status of soil during the period do not differ much, MIMOSA invisa and Centresema pubescens has yielded significantly more green matter when compare to Pueraria Javanica Calopagonium muconides, Crotolaria anagroides and Susbania SpeciosaItem Effect of green manuring on the production of arecanut(2007-02-08) Sannamarappa, M.Annual application of green leaf to arecanut palm is a common practice in Karnataka and Kerala. A field experiment was conducted at Central Plantation Crops Research Institute, Hirehalli from 1969 to 1972 to study the effect of growing six selected green manure crops in arecanut with reference to organic corbon status of soil and yield of arecanut. The studies revealed that there were no significant differences amongst the treatments in yield and yield attributes of arecanut. However it was observed that Mimosa invisa.and Centrocema pubes-cens yielded significantly more green matter when compared to Pueraria javanica, Calopogonium muconoides, Crotolarta anagyfotdes'and Sesbaniaspeciosa. From the point of improvement in the organic corbon status in the soil Mimosa invisa and calapogonium muconoides were found to be ideally suited.Item Effect of tillage operations in arecanut plantations of maidan parts of Karnataka on the productivity of palms(2007-02-08) Sannamarappa, M.; Kumar, S.N.S.; Nagaraja, B.The results of a tillage experiment on arecanut indicated that digging with mummty fork twice a year in June and December produced significantly more number of leaves, spadices, bunches, fruits, and wet weight of nuts than all other treatments.Item Evaluation of turmeric and sweet potato to manuring in arecanut gardens(2007-02) Sannamarappa, M.; Shivashankar, K.Response of turmeric and sweet potato to manuring as intercrops in arecanut gardens and as pure crops was evaluated by studying the growth attributes like number of leaves, tillers, LAR, RLGR, RGR, NAR, bio-mass production and yield of economic end products. Response behaviour of turmeric and sweet potato was the same as inter crops and pure crops. Number of functional leaves, tillers or branches/plant and biomass production showed increase with manuring; but these were not reflected in yield of economic end products.Item Green manure crops for arecanut gardens(2007-02) Mohapatra, A.R.; Sannamarappa, M.; Brahma, R.N.; Bhat, N.T.Item Inter and mixed cropping trials 3. Arecanut with other crops (a) Arecanut and Cocoa(Central Plantation Crops Research Institute , Mohit Nagar, Jalpaiguri dist, West Bangal, 1981) Sannamarappa, M.; Abdul Khader, K.B.; Venugopal, K.Item Multiple Cropping(1982-12) Sannamarappa, M.; Muralidharan, A.Item Performance of Turmeric and Sweet Potato-Cowpea Planted as Intercrops at two Intercropping Intensities Under four Different Densities of Arecanut(2007-02) Sannamarappa, M.; Shivashankar, K.Growth attributes of intercrops like turmeric, and sweet potato-cowpea were partially influenced by either arecanut plant densities or intercropping intensities. At 2.7 x 2.7 m spacing of arecanut, sweet potato produced 174 leaves at 60% intercropping intensity and cowpea produced 287 leaves per plant. Biomass production was higher at 1.8 mx 3.6 m at 60% intercropping intensity in turmeric, while wider spacing (3.6 mx 3.6 m) at 60% intercropping intensity was ideal for high biomass production in sweet potato. Intercrops behaved differently in yield attributes in response to plant densities of arecanut and intercropping intensities. In turmeric, yield increased with narrower spacings while in sweet potato wider spacings were optimum in enhancing yield attributes and yields. Turmeric and sweet potato responded to 60% intensity with 5228 kg/ ha and 4549 kg^ha compared to 3764 kg/ ha and 3743 kg/ ha at 40% intensity respectively. Cowpea yielded better with wider spacings.Item Spacing Trial In Arecanut(1990) Sannamarappa, M.Item Studies on the Performance of Wheat Crop in Rice Fallows(1974) Sannamarappa, M.Item Uniformity Trial: Size, Shape And Direction Of Experimental Plots For Turmeric(1987) George, M.V.; Sannamarappa, M.The Fairfield Smith equation with standard notations Y = ax-8 and its generalisation in the form Y = ar-g1C-g2 was fitted to the uniformity trial data on turmeric collected from Hirehalli for two different directions with 24 beds of size 1 m x 12 m each. The directions were north-south and east-west. However, the fertility gradient was in the north-south direction. In both cases the plot sizes consisting of 3 beds of size lm x lm along the fertility gradient was found to be optimum.Item Uniformity Trials: Optimum Size And Shape Of Plots And Blocks In Experiment With Ginger(1984) George, M.V.; Sannamarappa, M.; Bhagavan, S.; Sampath Kumar, S.N.Fairfield Smith’s equation with standard notations Y=ax-g and its generalisation in the form y=ac-g1r-g2 were fitted to the uniformity trial data on ginger conducted at Hirehalli during 1976-77 and 1977-78 where Y is the CV for the plot size x with r rows and c columns, taking the ultimate unit as (i) one row of 5 plants and (ii) number of plants in 1m x 1m bed. Row-wise heterogeneity was higher than column-wise heterogeneity showing thereby that formation of plots with more rows will give more homogeneous blocks for experiments. The cost of experimentation per treatment to estimate the means at 5 per cent CV was worked out under different price situations. Plot size consisting of 3-4 rows of one column m the case of ultimate unit of plants in 1m x 1m bed, and plot size of 6 rows of one column in the case of ultimate unit of one row of 5 plants each, were found to be optimum.