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Author : Congming Zou
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (925 download)
Download or read book Soil Management and Nitrogen Dynamics in Burley Tobacco Rotations written by Congming Zou and published by . This book was released on 2015 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Perry Elmer Karraker
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (31 download)
Download or read book Cropping and Soil Management for Burley Tobacco written by Perry Elmer Karraker and published by . This book was released on 1943 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George Roberts
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (31 download)
Download or read book Soil Management and Fertilization for Tobacco written by George Roberts and published by . This book was released on 1938 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roland Nuhu Issaka
Publisher : BoD – Books on Demand
ISBN 13 : 1789846781
Total Pages : 108 pages
Book Rating : 4.7/5 (898 download)
Download or read book Soil Productivity Enhancement written by Roland Nuhu Issaka and published by BoD – Books on Demand. This book was released on 2018-11-28 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Productivity Enhancement comprises five chapters written by scientists from various parts of the world. The book is divided into three sections. 1: Conversion of Environmentally Polluting Waste into Fertilizer. This section discusses the conversion of waste water and other by-products from factories into organic fertilizers. It further examines how these materials can be used to enhance crop production and improve soil productivity. 2: Practices for Improving Nutrient Availability. Good nutrient management and proper composting of organic materials are options that can be used to enhance the productivity of soil. These and other practices are examined in this section. 3: Policy on Fertilizer Use. The need for effective policies to control and promote the effective and efficient use of fertilizers is discussed in this section.
Author :
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (459 download)
Download or read book Soil and Plant Monitoring of Nitrogen as Management Tools for Nitrogen Fertilization and Tsna Reduction in Burley Tobacco written by and published by . This book was released on 2009 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Burley tobacco (Nicotiana tabacum L.) has historically been fertilized with high nitrogen rates. This study was conducted to evaluate the effect of nitrogen rate on yield and total tobacco specific nitrosamine (TSNA) concentration. The experiment also evaluated the use of in season nitrogen monitoring techniques and how well they were able to predict yield and total TSNA concentration. In 2007, five preplant nitrogen treatments along with two sidedress nitrogen treatments were used. These included: 0, 67, 135, 202, 270 kg/ha nitrogen preplant and 0 and 67 kg/ha nitrogen sidedress. In 2008, there were only four preplant nitrogen rates with the two sidedress nitrogen rates. The 270 kg N/ha was removed for 2008. Also in 2008, four varieties were used and they were KT 204LC, TN 90LC, TN 90HC, and NC 7. Sidedress treatments were applied at three weeks after transplanting. The in season nitrogen monitoring techniques were the pre-sidedress nitrate test (PSNT), the Cardy nitrate meter, and the CM 1000 chlorophyll meter. PSNT samples were taken before sidedress treatments were applied. Chlorophyll and Cardy meter samples were taken at sidedress, topping, and harvest in 2007. A five weeks after transplant sampling date was added in 2008. Yields were optimized at 135 kg/ha total nitrogen rates. A quadratic plateau model was used to determined critical levels for PSNT and total nitrogen predicting yield and total TSNA. Relative yield plateaued at 0.953 with 204.8 kg/ha total nitrogen applied. A critical PSNT level of 46.4 ppm soil nitrate was established for burley tobacco. TSNA levels increased up to 135 kg N/ha and reached a plateau at 257.8 kg/ha total nitrogen. Total nitrogen applied was the best yield predictor out of the methods used to evaluate nitrogen status of burley tobacco. However analysis of PSNT for different soil types might prove to be a more reliable nitrogen management tool. Cardy nitrate measurements did differ over the nitrogen rates, but there was no relationship between yield or TSNA and petiole nitrate levels during the growing season. Chlorophyll measurements did not correlate to nitrogen rates or yield.
Author : A. Y. Chambers
Publisher :
ISBN 13 :
Total Pages : 1102 pages
Book Rating : 4.:/5 (31 download)
Download or read book Effects of Time of Fumigation and Sources of Nitrogen on Burley Tobacco Plant Production written by A. Y. Chambers and published by . This book was released on 1961 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (319 download)
Download or read book Annual Report written by and published by . This book was released on 2000 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (221 download)
Download or read book Rate and Timing of Nitrogen Fertilization in Burley Tobacco written by and published by . This book was released on 2007 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our objectives in this study were to evaluate the state recommendations for nitrogen, determine the effects of nitrogen on tobacco specific nitrosamines (TSNA), yield and quality, determine efficient nitrogen rates and evaluate the pre sidedress nitrate test (PSNT) as an indicator of nitrogen needs in burley tobacco. This study had nine nitrogen rates, in a split plot design with four replications. Main plots consisted of preplant nitrogen: 89.6, 179.2 and 268.8 kg/ha. Sub plots consisted of sidedress nitrogen: 0, 52 and 112 kg/ha. Soil nitrate-N was determined using the PSNT, with samples taken to a depth of 0.15 m three weeks after transplanting. There were two locations in 2004, at Greeneville, TN (GR) and Glade Spring, VA (GL). Two more locations were added in 2005 and 2006, Springfield, TN (HR) and Lexington, KY (LE) along with a tobacco after tobacco (TAT) rotational study at GR and HR also in 2006. Nitrogen rates within the state recommendations gave yields statistically equal to the maximum. In several cases, yield was maximized by lower than recommended rates. The study showed an increase in yield with an increase in nitrogen above the lowest treatment. All yields, except for HR 2005, exceeded the long term, Tennessee state burley yield average. A positive yield response to sidedress nitrogen fertilizer was observed at the 89.6 kg/ha treatment, with 56 and 112 kg/ha sidedressed and the 179.2 kg/ha treatment with 56 kg/ha sidedressed. There was only one instance with 268.8 kg/ha pre plant nitrogen where there was a positive yield response, likely due to variability within the study. Total TSNA content was also increased with higher nitrogen rates. TSNA content was lower in the dryer 2005 curing season. Although not an objective of this study, and not proven, it is likely that the locations of the curing structures had some effect on TSNA content. PSNT values increased as nitrogen rates increased. From this study the PSNT does not seem to be a precise enough indicator of nitrogen needs in burley tobacco to be used in making N application decisions.
Author : Kentucky Agricultural Experiment Station
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (243 download)
Download or read book Annual Report written by Kentucky Agricultural Experiment Station and published by . This book was released on 1988 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: First- annual reports include also its Bulletins, no. 1-
Author : Kentucky Agricultural Experiment Station
Publisher :
ISBN 13 :
Total Pages : 768 pages
Book Rating : 4.:/5 (2 download)
Download or read book Annual Report - College of Agriculture, Agricultural Experiment Station of the University of Kentucky written by Kentucky Agricultural Experiment Station and published by . This book was released on 1988 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issue for 1910 includes also: Report of the director of the Kentucky Agricultural Experiment Station to the Governer of Kentucky on the enforcement of the Food and drugs act for the years 1908 and 1909.
Author : Kentucky Agricultural Experiment Station
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (6 download)
Download or read book Annual Report for the Year Ending December 31 ... written by Kentucky Agricultural Experiment Station and published by . This book was released on 1988 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph Lee Griffy
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (263 download)
Download or read book The Effects of Nitrogen Fertilization and Residual Soil Nitrate Levels on Yield and Value of Burley Tobacco written by Joseph Lee Griffy and published by . This book was released on 1990 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1006 pages
Book Rating : 4.E/5 ( download)
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Lee Davis
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (198 download)
Download or read book Effects of Time of Fumigation and Sources of Nitrogen on Burley Tobacco Plant Production written by Robert Lee Davis and published by . This book was released on 1962 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mara Cloutier
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (127 download)
Download or read book Toward Understanding the Impact of Management Practices on Soil Microbial Nitrogen Dynamics in Agroecosystems written by Mara Cloutier and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Emissions were affected by termination timing x day of sampling (DOY) and residue treatment x DOY, but no strong patterns were observed. Cumulative N2O emissions were highly correlated with aboveground residue C and C/N and root C/N. Daylight hours and corn growing degree days were significant predictors of N2O emissions. Interactions between soil temperature, NH4+, and corn growing degree days only explained ~ 10% of the variation in N2O emissions. Assessment of complete denitrification or 15N tracing experiments should be explored in the context of perennial termination to identify strategies to limit N2O emissions. In Chapter 6 I used a novel approach to integrate soil health and soil metagenomes to assess differences in soil health and microbial N metabolisms between uncultivated soils and cropped soils managed with contrasting practices. Soil samples were collected from dairy farms and included samples from forest or hedgerows next to cropping soils managed with either no-till and conventional amendments or tillage and organic amendments. Soil health was assessed using chemical, physical, and biological indicators using two sets of soil health tests. Soil microbially-mediated N transformations were quantified through whole-shotgun metagenomics. Soil health, particularly related to organic C and N, were highest in uncultivated soils followed by cropped soils from no-till farms while cropped soils from tilled-organic farms had the poorest soil health. Microbial genes for organic N use were correlated with soil quality indices and were highest in uncultivated soils, while inorganic N use genes were negatively correlated with ACE protein and were highest in the cropped soils. Dairy farm soil management employing no-till increased soil health and microbial organic N metabolisms relative to tilled-organic soils. Organic N metabolisms like urea production and consumption may be appropriate biological indicators of soil health. Further exploration across a wider range of cropping systems would be necessary to fully assess the validity in urea cycling in delineating soil health.
Author :
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (197 download)
Download or read book Sources of Nitrogen for Burley Tobacco written by and published by . This book was released on 1959 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (198 download)
Download or read book Response of Burley Tobacco to Irrigation and Nitrogen written by and published by . This book was released on 1963 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
