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Dehradun, India

Bhattacharyya P.,Indian Central Rice Research Institute | Mandal D.,CSWCRTI | Bhatt V.K.,Research Center Chandigarh | Yadav R.P.,Research Center Chandigarh
Journal of Sustainable Agriculture | Year: 2011

Soil loss tolerance limit (SLTL) is the maximum amount of soil which can be removed annually before the long-term soil productivity is adversely affected. In many situations, the establishment of a SLTL is intended to provide basic information for the maintenance of soil productivity, which becomes one of the foci of the sustainability of agricultural land use. In India a default soil loss tolerance limit of 11.2 Mg ha-1 yr-1 is followed for planning soil conservation activities. The objective of this study is to provide a methodology to estimate quantitative SLTLs for suggesting suitable soil conservation measures. The assessment framework used follows three basic steps; viz. indicator selection, indicator interpretation and integration into a soil quality (SQ) index value. A quantitative model was used to integrate potential soil indicators such as saturated hydraulic conductivity, bulk density, soil erodibility, organic carbon and pH to assess soil resistibility to erosion. Scaling functions were used to convert soil parameters to a unitless 0 to 1 scale. Normalized values of all these soil parameters were then multiplied by assigned weights based on relative importance and sensitivity analysis. Soils were grouped into 1, 2, and 3 depending on overall additive score. A general guideline developed by the USDA-Natural Resource Conservation Service (NRCS) was followed, with certain modifications in depth categories, for estimation of SLTLs. The model was tested on 14.86 Mha of land in northern India comprising of the states of Punjab, Haryana and Himachal Pradesh. SLTLs varied from 2.5 to 12.5 Mg ha-1 yr-1 compared to the single value applied earlier. © Taylor & Francis Group, LLC. Source


Muruganandam M.,Central Soil and Water Conservation Research and Training Institute CSWCRTI | Pande R.K.,DBS PG College | Sharda V.N.,Agricultural Scientists Recruitment Board ASRB | Mishra P.K.,CSWCRTI
Indian Journal of Traditional Knowledge | Year: 2014

A study carried out to assess existing basic knowledge and perceptions of farmers on fish farming in Uttarakhand Himalayas during 2003-08 indicated prevalence of as many as 16 mythical superstitions on fish identification, features of fishponds and various attributes of fishes or fish farming among farmers adding to already existing problems of fisheries development in the region. Preference for deeper fishponds or water harvesting structures (WHS) and coldwater river fishes against farmed or warm water river fishes; ignorance on the needs of liming or fertilization in fishponds and various benefits of fishes or fish farming other than for food purpose were widely held by 81-86% respondents. Ignorance on the negative impacts of fishing in rivers using powder prepared from the woody shrub, Zanthoxylum armatum DC., locally called as timru was observed in 69% respondents and probably this helps to continue periodically organized traditional fishing festivals, known as mound or machli mela using timru powder, that destroy riverine ecosystems in the region. Importance of water management in fish farming and potential of pig rearing or use of pig dung as fertilizer in fishponds or crop fields were not recognized by 50% respondents. Overall, ignorance on various principles, recommended practices and inputs of fish farming, features of fishes and fishing in rivers were prevalent in the region. A review made on issues of prevailing superstitions provided scientific and logical explanations either in support of them or otherwise. The paper identifies possible researchable issues associated with the myths and suggests dispelling unscientific superstitions maybe through appropriate research findings, trainings and positive demonstrations by the existing advisory systems. Source


Kumar A.,ICAR Research Complex for NEH Region | Avasthe R.K.,CSWCRTI | Rameash K.,NBPGR Regional Station | Pandey B.,ICAR Research Complex for NEH Region | And 3 more authors.
Scientia Horticulturae | Year: 2011

Field experiments were conducted during 2005-09 at ICAR Sikkim Centre, Tadong, East Sikkim, India at an altitude of 1400. m. amsl to identify the suitable environment for high production of good quality fruits with less diseases for strawberry varieties Ofra and Chandler. Both the varieties were grown under low cost polyhouse, plastic tunnel and open conditions. Maximum number of flower trusses per plant was recorded in Chandler under open condition (13.0) followed by plastic tunnel (12.7). The maximum number of fruits per inflorescence was found in Ofra (7.12) under polyhouse while maximum number of runners per plant was observed in Ofra (12.3) in open conditions. Plastic tunnel with Ofra produced highest fruit weight (26.2. g), fruit length (5.5. cm) and fruit diameter (3.9. cm). Best fruit quality in terms of TSS (6.8%), lower acidity (0.83%) and total sugar (6.3%) was observed in Chandler under plastic tunnel conditions. The highest total fruit yield was recorded with Ofra under plastic tunnel (40.2. t/ha) but the maximum marketable yield was obtained in Chandler under plastic tunnel (35.3. t/ha). Diseases were found to be less prevalent in tunnel as compared to polyhouse and open conditions. © 2011 Elsevier B.V. Source


Singandhupe R.B.,C.I.C.R. | Kannan K.,CSWCRTI | Brahmanand P.S.,DWM
Indian Journal of Agronomy | Year: 2013

A field experiment was conducted at the Directorate of Water Management, Bhubaneswar (Odisha) during rabi seasons of 2005-06 and 2006-07 to study the effect of drip irrigation regimes and fertigation levels on stevia (Stevia rebaudiana, Bertoni), grown in rice fallow. The treatments included three irrigation regimes (I1- drip irrigation at 100% PE, I2 at 80% PE and I3 at 60% PE) and three fertility levels (F1 -100%, F2 - 75% and F3 - 50% recommended dose of 110-45-45 kg N-P2O5-K2O/ha) with an extra treatment as control having surface irrigation with soil application of fertilizers were tested in a factorial randomized block design with three replications. Pooled data of two years showed that drip fertigation improved fresh leaf by 4.9 %, dry leaf by 4.0 % and total biomass yield by 2.04 % over conventional surface irrigation with soil application of fertilizer. Irrigation through drip at 100% PE produced maximum fresh leaf (8.95 t/ha), dry leaf (2.74 t/ha) and total biomass yield (34.44 t/ha). Application of 100% RD (F1) gave highest quantity of fresh leaf (8.21 t/ha), dry leaf (2.53 t/ha) and biomass (33.50 t/ha) compared to 75% RD and 50% RD. Application of irrigation at 100% PE with 100% recommended dose of fertilizer produced 9.13 t of fresh leaf 2.90 t dry leaf and 35.0 t biomass yield per hectare and; improved glycoside contents. However, the magnitude of N, P and K contents in both soils and plants have also been enhanced with 100% fertilizer application of N, P2O5 and K2O (110-45-45 kg/ha) compared to lower levels. Source


Kumar R.,CSWCRTI | Shamet G.S.,CSWCRTI | Chaturvedi O.P.,CSWCRTI | Kumar S.,CSWCRTI | And 4 more authors.
Annals of Biology | Year: 2014

Pinus gerardiana Wall, is an important forestry species having restricted distribution in India. It has been observed that regeneration in the species is extremely poor or entirely lacking due to influence of biotic and abiotic factors. The irregularity of the species in seed production and dormancy related problems reduces germination in natural forests. Therefore, different treatments to seeds were tried to enhance the germinability in the species. The seeds were subjected to three different gibberellic acid treatments (Control, 75 and 150 ppm) following four soaking periods (Control, 8,16 and 24 h) and two incubation temperatures (15°C and 25°C) for assessing their impact on seed germination. It was observed that among different gibberellic acid concentrations highest germinability parameters were observed, when seeds were treated with 75 ppm GA3 (G2). Among the different soaking periods, highest germinability was observed when seed were soaked for 24 h. The incubation temperature showed better results at 15°C in comparison to 25°C. In general, the present study identified that gibberellic acid treatment of 75 ppm, seed soaking for 24 h at 15°C incubation temperature was easily applicable procedure for enhancing germination. Source

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