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The Effects Of Nitrogen Fertilization And Residual Soil Nitrate Levels On Yield And Value Of Burley Tobacco
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Book Synopsis The Effects of Nitrogen Fertilization and Residual Soil Nitrate Levels on Yield and Value of Burley Tobacco by : Joseph Lee Griffy
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:
Book Synopsis Rate and Timing of Nitrogen Fertilization in Burley Tobacco by :
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.
Book Synopsis The Effects of Nitrogen Fertilization on the Yield and Quality of Two Burley Tobacco Varieties by : Mohd. Azmi Ab. Rahman
Download or read book The Effects of Nitrogen Fertilization on the Yield and Quality of Two Burley Tobacco Varieties written by Mohd. Azmi Ab. Rahman and published by . This book was released on 1979 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cropping and Soil Management for Burley Tobacco by : Perry Elmer Karraker
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:
Download or read book Fertilizer Abstracts written by and published by . This book was released on 1974 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilizer Tests with Tobacco, with Special Reference to Effects of Different Rates and Sources of Nitrogen and Potash by : James Edward McMurtrey
Download or read book Fertilizer Tests with Tobacco, with Special Reference to Effects of Different Rates and Sources of Nitrogen and Potash written by James Edward McMurtrey and published by . This book was released on 1934 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master's Theses Directories written by and published by . This book was released on 1991 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Irrigation, Fertigation and Plasticulture in Burley Tobacco Production with a Focus on Yield, GRI and TSNA Concentration by :
Download or read book A Study of Irrigation, Fertigation and Plasticulture in Burley Tobacco Production with a Focus on Yield, GRI and TSNA Concentration written by and published by . This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fertilization is important in attaining high yielding, quality tobacco. However, practices that use excessive N can be uneconomical, threaten the environment and produce leaves that are high in nitrates. Leaves high in nitrates have been positively correlated with leaves that are high in tobacco specific nitrosamines (TSNA), which are considered potent carcinogens. Competition from cheaper, foreign leaf, increasing costs of fertilizers and new market structures which show purchasers seeking low TSNA leaf demand that producers become more efficient in their N use. The objective of this study is an examination of burley (TN 90) and dark (KY 171) tobacco cultural practices with the hypothesis that optimizing growing conditions will enhance N efficiency. This experiment took place during 2005 and 2006 in the traditional tobacco growing regions of Springfield (Dickson silt loam) and Greeneville, TN (Lindside silt loam). Experimental isolated growing condition variables. Irrigation treatments isolate the importance of soil moisture. Fertigation, while using irrigation practices, isolates the effects of synchronizing crop N demand with N supply. Plasticulture, using fertigation protocol, isolates the importance of soil temperature. Season long measurements of soil-water tension, soil temperature and leaf nitrates were used to evaluate the ability of each practice to keep plants in optimal N uptake and utilization growing conditions. Results showed that the most dramatic and consistent treatment effects were found in the TSNA analysis. Even during a season characterized by precipitation being sufficient in volume and timing to meet plant water demands, irrigation was successfully able to decrease TSNA concentration by about 30%. During drier growing seasons, TSNA was reduced by 50% or more. Measurements of leaf nitrates taken with a Horiba monitor were able to consistently detect treatment and N rate differences. The last sample taken around eight weeks after transplanting correlated strongly with TSNA content (0.81). This tool could prove effective in characterizing optimal N management. Cultural practices that offer control over soil water tension, nitrate content in leaves and soil temperatures can be effective in increasing the ability of the plant to uptake and utilize N towards achieving high yielding, high GRI quality and low TSNA leaf.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilization of Dryland and Irrigated Soils by : J. Hagin
Download or read book Fertilization of Dryland and Irrigated Soils written by J. Hagin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much has been learned about the proper and judicious use of fertilizers. Fertilizer application by farmers has grown from an art to a science. As food producers have strived to increase crop yields by overcoming nutrient deficiencies the use of fertil izers has increased dramatically. This has created a large chemical industry capable of supplying the needed plant food elements. A more complete understanding of soil chemistry and plant nutrition has led to greater fertilizer use with improved fertilization methods and crop cultural practices. Improved fertilizer technology has led to the production of more efficient forms of fertilizer. The modem fertilizer industry and with it fertilization practices began in the humid countries of the world. The use of fertilizers in arid and semiarid regions was later in development, although agriculture had its beginning in semiarid and arid regions. The development offertilizer use is parallel to industrial development in various areas of the world.
Book Synopsis Fertilizer Experiments with Tobacco by : Wightman Wells Garner
Download or read book Fertilizer Experiments with Tobacco written by Wightman Wells Garner and published by . This book was released on 1919 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Maturity and Priming of Burley Tobacco on Yield, Quality, and Labor Requirements of the Crop by : George Boyd Byers
Download or read book Effect of Maturity and Priming of Burley Tobacco on Yield, Quality, and Labor Requirements of the Crop written by George Boyd Byers and published by . This book was released on 1950 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Some Fertilizer Ingredients Upon Yield, Value and Chemical Composition of Flue-cured Tobacco by : Willie Garland Woltz
Download or read book Effects of Some Fertilizer Ingredients Upon Yield, Value and Chemical Composition of Flue-cured Tobacco written by Willie Garland Woltz and published by . This book was released on 1948 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Nitrogen Fertilization on Yield and Quality of Burley Tobacco as Revealed by Field Experimentation ... by : Ridha Said Maroof
Download or read book The Effect of Nitrogen Fertilization on Yield and Quality of Burley Tobacco as Revealed by Field Experimentation ... written by Ridha Said Maroof and published by . This book was released on 1952 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Potassium Source and Rate on Yield, Quality, and Leaf Chemistry of Dark and Burley Tobacco, and Residual Effects of Soil K Levels by : Andrea Brooke Keeney
Download or read book Effects of Potassium Source and Rate on Yield, Quality, and Leaf Chemistry of Dark and Burley Tobacco, and Residual Effects of Soil K Levels written by Andrea Brooke Keeney and published by . This book was released on 2019 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography of Agriculture with Subject Index by :
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1987-10 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
