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Tripura, India

Yadav S.K.,Banaras Hindu University | Babu S.,Banaras Hindu University | Babu S.,NEH Sikkim Center | Singh Y.,Banaras Hindu University | And 7 more authors.
Indian Journal of Agronomy | Year: 2013

A field experiment was carried out at Varanasi for two years (2005-2007) to study the effect of organic nutrient sources on yield, nutrient uptake and soil properties of rice (Oryza sativa L.) based cropping sequence. Seven rice-based cropping sequences viz. rice-potato (Solanum tuberosum L.)-onion (Allium cepa L); rice-green pea (Pisum sativum var. hortense)-onion; rice-potato-cowpea (Vigna unguiculata subsp. sesquipedalis); rice-green pea-cowpea; rice-rajmash (Phaseolus vulgaris L.)-onion; rice-rajmash-cowpea and rice-maize (Zea mays L.)-cowpea were assigned to main plots and three treatments of nitrogen application viz. control; organic manure; organic manure + biofertilizer were allotted to sub plots. Highest rice equivalent yield (35.57 t/ha), monetary net returns (268.7×103/ha), production efficiency (96.81 and 98.11 kg/ha/day) and irrigation efficiency (504.8 and 511.6 kg/ha-cm) were found under rice-potato-onion cropping sequence. Among the organic treatments, the highest rice equivalent yield (35.3 t/ha), production efficiency (95.7 and 97.8 kg/ha/day), irrigation efficiency (515.7 and 527.4 kg/ha-cm) and soil biological indictors like dehydrogenase activities, urease activities, soil microbial biomass carbon and soil microbial biomass nitrogen were obtained under organic nutrient management combined with biofertilizers. Source


Yadav S.K.,Banaras Hindu University | Yadav S.K.,Central Potato Research Station | Babu S.,Banaras Hindu University | Babu S.,NEHSikkim Center | And 8 more authors.
Indian Journal of Agronomy | Year: 2013

A field experiment was conducted during 2005-06 and 2006-07 at Varanasi, Uttar Pradesh, to find out the effect of organic nitrogen sources and biofertilizers on system productivity and energy budgeting of rice (Oryza sativa L.)-based cropping system. Rice-potato [Solanum tubersoum (L.)]-onion [Allium cepa (L.)] system recorded significantly higher production efficiency (97.5 kg/ha/day), land-utilization efficiency (91.4%), economic efficiency (738/ha/day), energy input (61.08×103MJ/ha) and energy output (187.09×103MJ/ha). The lowest (39.4 × 103MJ/ ha) energy intensiveness was recorded in rice-table pea (Pisum sativum var. hortense)-cowpea [Vigna unguiculata (L.) Walp.] cropping system. However, the organic nutrition with biofertilizers (Azotobacter and phosphate-solubilizing bacteria) had the highest rice-equivalent grain yield (35.3 t/ha), production efficiency (96.7kg/ha/ day), land utilization efficiency (89.8%), economic efficiency (803 ha/day) and energy-use efficiency (3.15) of system, followed by organic nitrogen sources alone (3.0). Recommended dose of N @100% through organic nitrogen sources alone was the next best treatment resulting in higher productivity and system efficiency. Rice-potato-onion cropping system was found most productive, profitable and energy efficient with application of 100% recommended dose of nitrogen through organic sources along with biofertilizers. © 2013, Indian Society of Agronomy. All rights reserved. Source


Babu S.,Indian Agricultural Research Institute | Babu S.,Sikkim Center | Rana D.S.,Indian Agricultural Research Institute | Yadav G.S.,Indian Agricultural Research Institute | And 3 more authors.
Indian Journal of Agricultural Sciences | Year: 2013

A fixed plot field experiment was carried out during kharif and spring seasons of 2008-09 and 2009-10 at New Delhi, to study the residual effect of sunflower (Helianthus annuus L.) stover and P management and direct effect of N and P on productivity, nutrient uptake and economics of spring sunflower. Residual effects of sunflower stover incorporation and 30 kg P/ha and direct effect of recommended dose (RD) of NP (80 kg N + 15 kg P/ha) resulted in higher yield attributes, seed, stover and biological yields, gross returns, net returns, B:C ratio and uptake of N, P and K. Residual effect of sunflower stover incorporation increased seed yield of sunflower by 14.9 and 25.9% over the no stover incorporation during 2009 and 2010, respectively. Residual effect of 30 kg P/ha caused 22.3% and 24.4% increase in the seed yield of sunflower over the control during 2009 and 2010, respectively. Direct effect of RD of N and P (80 kg N + 15 kg P/ha) recorded the maximum seed yield (2.85 and 2.57 tonnes/ha) during both the years, which was significantly higher than 50% RD of NP (2.56 and 2.27 tonnes/ha) and control (1.70 and 1.57 tonnes/ha). Increase in seed yield due to RD of NP was 11.3 and 13.2% higher than 50% RD of NP and 67.6 and 63.7% than control. With regards to economics and nutrients uptake, residual effect of sunflower stover incorporation and 30 kg P/ha recorded significantly higher values of gross returns, net returns and B: C ratio and NPK uptake over control (no stover incorporation) and other P levels, respectively. Among the different doses of NP applied to sunflower, direct effect of RD of NP (80 kg N + 15 kg P/ha) registered the highest gross returns (64.11 × 103 and 6.13 × 103 RS/ha), net returns (48.76 × 103 and 44.66 × 103 RS/ha) and B:C ratio (3.19 and 2.80). Source


Datta M.,Tripura Center | Yadav G.S.,Tripura Center | Chakraborty S.,Tripura Center
Legume Research | Year: 2016

North east hilly eco-region of India is characterized by highly undulating topography and fragile ecology. Here the cultivation of rice on upland and medium land is not a profitable venture to farmers. Therefore, to find out alternative crop with high yield potential cultivars a three year field study from 2008 to 2010 on agronomic evaluation of groundnut cultivars under sub-tropical climate of North East hillyAgro-ecological region was carried out. The experiment consists of fourteen groundnut cultivars (V1- ICGS-76, V2- GG-2, V3- GG-13,V4-TG 37A, V5-FeESG-10, V6-FeESG-8,V7-K-134,V8-GG-6,V9-SB XI, V10GG-11,V11-KAUSHAL,V12-GG-4,V13-GG-2,V14-GG-8) as treatment in randomized block design and replicated thrice. Results revealed that highest plant dry weight was produced by cultivar “KAUSHAL” (32.99 g/plant), while lowest was recorded with cultivar “FeESG-10” (16.32 g/plant). However, the highest numbers of pod (25.32) were observed with “ICGS-76”. Cultivar GG-11 had produced highest pod and seed weight (34.80 g/plant and 20.62 g/plant, respectively) as compared to other cultivars, while lowest pod and seed weight (8.96 g/plant and 6.39 g/plant, respectively) with “FeESG-8”. Maximum pod yield (2.06t/ha) was produced by GG-11 cultivars, although highest stover yield (2.37 t/ha) was produced in cultivar KAUSHAL. Cultivar GG-11 had also recorded highest shelling percentage. Therefore, it is suggested that GG-11 a better option for substituting the upland and medium land rice during kharif season for enhancing the farmer’s income. © 2016, Agricultural Research Communication Centre. All rights reserved. Source


Prakash J.,Tripura Center | Singh N.P.,Tripura Center | Sankaran M.,Tripura Center
Acta Horticulturae | Year: 2010

Papaya (Carica papaya L.) is one of the most important commercial fruit crops of tropical and subtropical region of globe and India as well. Majority of nutrient is lost either in soil through leaching and most of the phosphorous is fixed by some soil components into a form, which are not readily available to the plants. An experiment was carried out at the experimental farm of ICAR (RC) for NEH Region, Tripura Centre, Lembucherra during 2006-2007 to find out the influence of various doses of NPK+VAM on plant growth, flowering, fruit characteristics and yield of papaya. Total of thirteen treatment combinations were taken with four replications to execute the experiment. One third of N and full amount of P and K & rhizogold (VAM) were applied just before planting of papaya seedling as basal dose and rest N in two split doses. The application of full dose of NPK+10 g rhizogold per plant registered more stem girth (11.45 cm), early flowering (98.50 DOP), fruiting zone (148.65 cm), number of fruits per plant (49.25) and fruit yield (59.62 kg/plant). The full dose of NPK+15 g rhizogold was also at par for the fruit weight and yield. The increase in fruit yield and enhancement in fruit quality was due to higher uptake of nutrients by the plants as influenced by vesicular arbuscular mycorrhizae in root zone of the plants. Source

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