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Mahendran, P. P.
- Nitrogen Distribution Under Sub Surface Drip Fertigation System on Banana Cv. RASTHALI
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Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, Adhiparasakthi Agricultural College, Kalavai, Vellore (T.N.), IN
2 Department of Soil Science and Agricultural Chemistry, Agricultural College and Research Institute, Madurai (T.N.), IN
1 Department of Soil Science and Agricultural Chemistry, Adhiparasakthi Agricultural College, Kalavai, Vellore (T.N.), IN
2 Department of Soil Science and Agricultural Chemistry, Agricultural College and Research Institute, Madurai (T.N.), IN
Source
An Asian Journal of Soil Science, Vol 12, No 2 (2017), Pagination: 242-247Abstract
The sub surface drip fertigation is a technique to applay both water and fertilizers through drip irrigation system during the recent years were shown to be very effective in achieving higher water and fertilizer use efficiencies. The nutrient mobility study revealed that fertigation treatments maintained higher concentration of available nitrogen around ischolar_main zone of banana compared to surface irrigation with soil application of recommended dose of fertilizers where most of the nutrients moved to deeper layer due to leaching fraction of applied fertilizers. In general, subsurface drip fertigation of 100 per cent RDF treatments in combination with liquid biofertilizers maintained higher available NPK in the post harvest soil compared to surface irrigation with soil application of recommended dose of fertilizers. Further, drip fertigation integrated with liquid biofertilizers created favourable condition for multiplication of beneficial micro-organisms in the rhizosphere region.Keywords
Subsurface Drip Fertigation, Nutrient Mobility, Nitrogen, Banana.References
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- Impact of Silicon on Sugarcane Leafhopper, Pyrilla perpusilla Walker by Enhancing Parasitism of Epiricania melanoleuca (Fletcher)
Abstract Views :305 |
PDF Views:157
Authors
Affiliations
1 Tamil Nadu Agricultural University, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, IN
2 Tamil Nadu Agricultural University, Agricultural College and Research Institute, Kudumiyanmalai – 622104, Tamil Nadu, IN
3 Tamil Nadu Agricultural University, Grapes Research Station, Theni – 625526, Tamil Nadu, IN
1 Tamil Nadu Agricultural University, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, IN
2 Tamil Nadu Agricultural University, Agricultural College and Research Institute, Kudumiyanmalai – 622104, Tamil Nadu, IN
3 Tamil Nadu Agricultural University, Grapes Research Station, Theni – 625526, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 32, No 3 (2018), Pagination: 155-159Abstract
To evaluate the effect of four silicon fertilizers, field experiment was conducted in farmer’s holding at Poovanthi village of Sivagangai district, Tamil Nadu during 2017-2018 against sugarcane leaf hopper, Pyrilla perpusilla Walker and its parasitoid, Epiricania melanoleuca (Fletcher). Silicon fertilizers were applied @ 500 and 1000 kg ha-1 before planting and the leaf hopper population was recorded at 150, 180, 210, 240 and 270 days after application. The results of field experiment revealed that Pyrilla population was minimum in the plots treated with calcium silicate @ 1000 kg ha-1 (8.20 numbers/leaf) followed by calcium silicate @ 500 kg ha-1 (8.80 numbers/leaf) as compared over untreated check (98.20 numbers/leaf) and the percent reduction over untreated check was 82.45 and 73.71 per cent, respectively. Similarly, the per cent parasitism was maximum in the treatment with calcium silicate @ 1000 kg ha-1 (82.33%) during November, which was on par with untreated check. Hence, Pyrilla population declined to an extent of 82.45 per cent by enhancement of E. melanoleuca parasitism (82.33 %) due to the application of silicon fertilizers.Keywords
Epiricania melanoleuca, Parasitism, Pyrilla perpusilla, Silicon Nutrition.References
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