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Not AvailableSix contrasting land use systems including Eucalyptus, Oil Palm, Sugarcane, Fallow – Tobacco, Paddy – Tobacco and Green manure (Sunnhemp) Tobacco were evaluated for their effects on soil carbon (C) storage, stratification, C fractions and carbon management index (CMI). The total organic carbon (TOC) content was significantly greater in surface soil layer (0.00-0.15 m) under all the land use systems and showed a decreasing trend with increase in soil depth. The TOC in 0.00-0.05 m soil layer was maximum under Oil Palm (8.52 g/kg) while it was minimum in Fallow- Tobacco system (3.54 g/kg). The highest and the lowest soil organic carbon storages were recorded by Eucalyptus system (34.77 Mg/ha) and the Fallow - Tobacco system (20.46 Mg/ha), respectively. The labile fraction of SOC also showed a decrease with increasing soil depth. The Oil Palm system that received organic manures showed relatively large quantity of labile carbon (CL) (480 mg/kg) in surface soil (0.00-0.05 m). The CMI, an index of soil quality, was the highest (71) under Eucalyptus system and the lowest (35) in Fallow-Tobacco system at surface layer as compared to the forest soil as reference having CMI value of 100. Stratification ratio of TOC for Green manure (sunnhemp) – Tobacco system has uniform values at all the depths, indicating that this system has maintained uniform TOC at all depths. The lowest SOC storage as well as CMI observed in Fallow – Tobacco may be attributed to the fact that entire plant biomass (leaves, stems and roots) is generally taken off the field. This study demonstrates that the monocropping (Fallow – Tobacco) of tobacco leads to a depletion of soil organic carbon and its quality, and hence calls for use of organics at liberal rates for sustaining the soil quality and production sustainability.Not Availabl

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Not AvailableSix contrasting land use systems including Eucalyptus, Oil Palm, Sugarcane, Fallow – Tobacco, Paddy – Tobacco and Green manure (Sunnhemp) Tobacco were evaluated for their effects on soil carbon (C) storage, stratification, C fractions and carbon management index (CMI). The total organic carbon (TOC) content was significantly greater in surface soil layer (0.00-0.15 m) under all the land use systems and showed a decreasing trend with increase in soil depth. The TOC in 0.00-0.05 m soil layer was maximum under Oil Palm (8.52 g/kg) while it was minimum in Fallow- Tobacco system (3.54 g/kg). The highest and the lowest soil organic carbon storages were recorded by Eucalyptus system (34.77 Mg/ha) and the Fallow - Tobacco system (20.46 Mg/ha), respectively. The labile fraction of SOC also showed a decrease with increasing soil depth. The Oil Palm system that received organic manures showed relatively large quantity of labile carbon (CL) (480 mg/kg) in surface soil (0.00-0.05 m). The CMI, an index of soil quality, was the highest (71) under Eucalyptus system and the lowest (35) in Fallow-Tobacco system at surface layer as compared to the forest soil as reference having CMI value of 100. Stratification ratio of TOC for Green manure (sunnhemp) – Tobacco system has uniform values at all the depths, indicating that this system has maintained uniform TOC at all depths. The lowest SOC storage as well as CMI observed in Fallow – Tobacco may be attributed to the fact that entire plant biomass (leaves, stems and roots) is generally taken off the field. This study demonstrates that the monocropping (Fallow – Tobacco) of tobacco leads to a depletion of soil organic carbon and its quality, and hence calls for use of organics at liberal rates for sustaining the soil quality and production sustainability.Not Availabl

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Not AvailableFlue Cured Virginia (FCV) tobacco, an important high value commercial crop in India, is preferentially grown on light textured soils for better quality and exports. However, light textured soils are characterized with low potassium (K) reserves, poor K retention and high vulnerability to K leaching. Of all the essential nutrients, K is taken up in the largest amount by tobacco grown in irrigated Northern Light Soils (NLS) region of Andhra Pradesh. The large requirement coupled with low efficiency of applied K calls for evolving a K supply strategy that ensures optimum K nutrition of the crop and enhances K use efficiency. A field investigation was carried out for two consecutive Rabi seasons to evaluate potassium supply strategies for their effects on productivity and nutrient use efficiency of irrigated FCV tobacco on a sandy loam soil (Alfisol). The experiment comprising eight K supply strategies varying in rate, number of splits and timing of K applications was laid out in a randomized block design with three replications. Results indicated that K application either at 120 or 80 kg K2O ha-1 led to significant increase in green leaf yield, cured leaf and grade index of FCV tobacco over the no-fertilizer control and NP fertilizer use alone. K application in 4 equal splits (1:1:1:1) at 10, 25, 40 and 70 days after transplanting (DAT) resulted in higher yields as compared to its addition in 3 splits (1:2:1) at 10, 25 and 40 DAT or 25, 40 and 70 DAT. Nutrient uptake and use efficiency by tobacco was promoted by K application in 4 splits in contrast to its addition in 3 splits. All plots receiving K application maintained higher K availability as compared to the control and minus-K plots. The soil K availability was more or less similar for 120 kg K2O-1 and 80 kg K2O-1 with the identical K application strategies. Over all, the K application in 4 splits (1:1:1:1) timed at 10, 25, 40 and 70 DAT is the right K supply strategy for higher productivity and enhanced K use efficiency in irrigated FCV tobacco grown on light textured soils.Not Availabl

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Not AvailableTobacco is one of the important commercial cash crops grown in India and plays a vital role in the Indian economy. Yield and quality improvement of FCV tobacco through soil health management is essential for sustainable FCV tobacco production. In view of the scarcity in organic manures, by product of sugarcane industry (Tata geo green) was evaluated as an organic manure source for FCV tobacco in the light textured irrigated Alfisols. Field experiments were conducted during 2012-15, in split plot design with five main treatments, (no farm yard manure, FYM 5 t ha-1, FYM 10 t ha-1, TGG 1t ha-1and 2 t ha-1) and four sub-plots (No fertilizer, 50% of recommended dose of fertilizer (RDF), 75% RDF and 100% RDF) replicated four times. Results revealed that application of 100% and 75% RDF showed significantly higher green leaf yield, cured leaf yield and grade index over 50% RDF and control. Application of 10 t ha-1 FYM showed highest green leaf yield, cured leaf yield, nutrient uptake and grade index compared to other organic manures. Application of 100% RDF has recorded significantly higher N, P and K uptake. Based on the nutrient uptake and yield it can be concluded that among the sources, FYM 10 t ha-1 was superior to TGG. In the event of non-availability of FYM, TGG (1 t ha-1) can be used as a source of organic manure.Not Availabl

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Not AvailableTwo hundred and fifty two soil samples were collected from different farmers of 15 villages of Kandukur and Ponnaluru mandals under southern light soil area of FCV tobacco in Prakasam district of Andhra Pradesh. The representative soil samples from 6" depth from the surface were taken with the help of famers. The chemical analysis of samples for micronutrients indicates that in the study area the available zinc varied from 0.09 to 3.20 μg/g and available iron ranged from 0.49 to 32.5 μg/g. The available copper and available Manganese varied from 0.11 to 5.31 μg/g and 3.01 to 30.26 μg/g, respectively. Among the DTPA extractable micronutrients, Manganese was found high to very high, whereas the soils were very low to low in available zinc and medium to high in available iron and available copper. The nutrient index values were low for available Zn (1.14), medium to high for Fe (2.36) and high for available Cu (2.64) and Mn (3.00) in FCV tobacco grown light textured soils of Prakasam district.Not Availabl

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Not AvailableAn assessment of soil fertility of Northern Light Soil area of FCV tobacco was carried out to study the status of soil macro and micronutrients. Soils of the study area are mostly moderately acidic in nature with low organic carbon and available nitrogen with a mean value of 0.29 % & 110 kg ha−1 , respectively. Available phosphorus was high (88% samples) with a mean value of 92.6 kg ha−1 . While the average available potassium content was 297 kg ha−1with 48 % samples in medium class. Among available micronutrients, the available zinc content in 73 % of samples was very low – low (0.0 to 0.6 ppm). Whereas the availability of copper in 25 % samples was very low to low as per the fertility class (0.0 - 0.30 ppm). Available iron (18.8 -35.03 ppm) and manganese (17.03-21.5 ppm) contents were high in the region. Nutrient index of available nitrogen was 1.00 (Low) while, NI was 2.83 (High) & 2.36 (Medium) for available phosphorus and available potassium, respectivelyNot Availabl

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Not AvailableThis study investigated the technical feasibility of using the tobacco stems biomass (TSB), as a low-cost novel adsorbent for removal of methylene blue (MB) from water. TSB was characterized by pH zero-point-charge (pHZPC) and FTIR analysis. Batch adsorption studies were performed to evaluate process variables, kinetics and equilibrium of MB adsorption. Results showed that MB removal was higher at pH values >pHZPC of adsorbent, and for particle size <0.5 mm. The adsorption kinetics followed pseudo-second order (k250.008 to 0.001 g mg21 min21), with intraparticle diffusion as one of the rate limiting steps. The Langmuir isotherm with maximum capacity of 169.5 mg g21 was statistically found a best fit model. A single stage batch adsorber was designed and quantity of TSB required for treating 1000-10,000 L of stained water was determined. The results imply that the TSB with could be a promising alternative adsorbent for remediation of cationic dye bearing wastewater.Not Availabl

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Not AvailableTobacco is one of the important commercial cash crops grown in India and plays a vital role in the Indian economy. Yield and quality improvement of FCV tobacco through soil health management is essential for sustainable FCV tobacco production. In view of the scarcity in organic manures, by product of sugarcane industry (Tata geo green) was evaluated as an organic manure source for FCV tobacco in the light textured irrigated Alfisols. Field experiments were conducted during 2012-15, in split plot design with five main treatments, (no farm yard manure, FYM 5 t ha-1, FYM 10 t ha-1, TGG 1t ha-1and 2 t ha-1) and four sub-plots (No fertilizer, 50% of recommended dose of fertilizer (RDF), 75% RDF and 100% RDF) replicated four times. Results revealed that application of 100% and 75% RDF showed significantly higher green leaf yield, cured leaf yield and grade index over 50% RDF and control. Application of 10 t ha-1 FYM showed highest green leaf yield, cured leaf yield, nutrient uptake and grade index compared to other organic manures. Application of 100% RDF has recorded significantly higher N, P and K uptake. Based on the nutrient uptake and yield it can be concluded that among the sources, FYM 10 t ha-1 was superior to TGG. In the event of non-availability of FYM, TGG (1 t ha-1) can be used as a source of organic manure.Not Availabl

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Not AvailableThis study investigated the technical feasibility of using the tobacco stems biomass (TSB), as a low-cost novel adsorbent for removal of methylene blue (MB) from water. TSB was characterized by pH zero-point-charge (pHZPC) and FTIR analysis. Batch adsorption studies were performed to evaluate process variables, kinetics and equilibrium of MB adsorption. Results showed that MB removal was higher at pH values >pHZPC of adsorbent, and for particle size <0.5 mm. The adsorption kinetics followed pseudo-second order (k250.008 to 0.001 g mg21 min21), with intraparticle diffusion as one of the rate limiting steps. The Langmuir isotherm with maximum capacity of 169.5 mg g21 was statistically found a best fit model. A single stage batch adsorber was designed and quantity of TSB required for treating 1000-10,000 L of stained water was determined. The results imply that the TSB with could be a promising alternative adsorbent for remediation of cationic dye bearing wastewater. VC 2017 American Institute of Chemical Engineers Environ Prog, 36: 1005–1012, 2017Not Availabl

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Not AvailableTobacco is one of the important commercial cash crops grown in India and plays a vital role in the Indian economy. Yield and quality improvement of FCV tobacco through soil health management is essential for sustainable FCV tobacco production. In view of the scarcity in organic manures, by product of sugarcane industry (Tata geo green) was evaluated as an organic manure source for FCV tobacco in the light textured irrigated Alfisols. Field experiments were conducted during 2012-15, in split plot design with five main treatments, (no farm yard manure, FYM 5 t ha-1, FYM 10 t ha-1, TGG 1t ha-1and 2 t ha-1) and four sub-plots (No fertilizer, 50% of recommended dose of fertilizer (RDF), 75% RDF and 100% RDF) replicated four times. Results revealed that application of 100% and 75% RDF showed significantly higher green leaf yield, cured leaf yield and grade index over 50% RDF and control. Application of 10 t ha-1 FYM showed highest green leaf yield, cured leaf yield, nutrient uptake and grade index compared to other organic manures. Application of 100% RDF has recorded significantly higher N, P and K uptake. Based on the nutrient uptake and yield it can be concluded that among the sources, FYM 10 t ha-1 was superior to TGG. In the event of non-availability of FYM, TGG (1 t ha-1) can be used as a source of organic manure.Not Availabl