Download or read book Volatilization Losses of Nitrogen from Urea Applied to Egyptian Soils written by Charles Morrison Gilmour and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ammonia Volatilization from Soils Amended with Surface applied Urea written by Charles Michael Reynolds and published by . This book was released on 1986 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Loss of Urea Nitrogen Applied to Soil by Volatilisation as Ammonia and the Prevention of this Loss by Use of Enzyme Inhibitors and Bactericides written by William Matthew Waller and published by . This book was released on 1960 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Volatilization Losses of Nitrogen in Soils written by Suresh Kumar Sharma and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomic Effectiveness of Some Urea Phosphate Fertilizers as Determined by Ammonia Volatilization Losses and Crop Response written by Olusegun Adedayo Yerokum and published by . This book was released on 1984 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Cogranulated Urea urea Phosphate as a Nitrogen Source for Crop Production written by Richard Malcolm Johnson and published by . This book was released on 1986 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Controlling Ammonia Volatilization From Urea Surface written by Munazzah Meraj and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fertilizer consumption has increased three fold during the past 30 years. It reached one million nutrient tones in 1980/81, two million tons in 1992/93 and three million tons in 2002/03. Urea, today, is made in approximately 75 factories worldwide with a total capacity approaching 100,000,000 tons annually. Urea hydrolyzed by urease. Sodium Thiosulfate (ST) has been reported to inhibit nitrification and urea hydrolysis and thereby reduces volatilization of urea nitrogen as ammonia from soils fertilized with urea. A laboratory experiment was carried out by adding ST to urea (10 % by volume). We evaluated ST as a soil urease inhibitor by studying its effects on urea hydrolysis. Encouraging results were found in reducing NH3 losses when ST was applied it reduced NH3 losses in cotton 35.13%, 31.65% and 35.35%, 32.77% in Rice soils in first and second experiment respectively. It functions as urease and nitrification inhibitor.

Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.

Download or read book Egyptian Journal of Microbiology written by and published by . This book was released on 1992 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gaseous Nitrogen Loss from Urea Fertilisers in Asian Cropping Systems written by John Raymond Freney and published by . This book was released on 1989 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book World fertilizer trends and outlook to 2022 written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-10-30 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the world nitrogen, phosphorus and potassium fertilizer medium-term supply and demand forecasts for the period 2017-2022. FAO, in collaboration with other members of the Fertilizer Outlook Expert Group dealing with fertilizer production, consumption and trade, provides forecasts of world and regional fertilizer supply, demand and potential balance.

Download or read book Effect of Applied Urea N on Ammonia Volatilization Losses in Submerged Alkali Soils in Relation to Yeild and Nutrition of Rice written by Dinesh Kumar and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impacts of Soil Physical Properties and of the Wind Tunnel Measurement Technique on Ammonia Volatilization from Urea fertilized Soil written by Devon Watt and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ammonia (NH3) volatilization from agriculture has negative impacts on human and ecosystem health (Galloway et al., 2003), and represents an extra expense for producers, who often over apply fertilizer to compensate for losses of nitrogen (N) (Good et al., 2011). Further research into the impact of different drivers on NH3 volatilization is required to recommend techniques to mitigate losses to producers; specifically, more research is needed on the impacts of soil water content (SWC), soil aggregate size and soil type on NH3 volatilization from subsurface-banded urea. Flux increased with greater initial SWC (P ≤ 0.05). This was likely caused by a more rapid and complete hydrolysis of urea in the wetter treatments at the beginning of the experiment. The largest aggregate size soil emitted more NH3 than the smaller size treatments (P ≤ 0.05). The presence of large macropores in the larger size treatments likely caused enhanced NH3 diffusion as the total ammoniacal nitrogen (TAN, the N present in solution in the form of NH3 and NH4+) solution in the soil had more exposure to the air. A stepwise analysis of the results from the soil type experiment showed that cation exchange capacity (CEC) was the only significant factor affecting cumulative NH3 emissions amidst the group of measured soil characteristics. CEC of soil is also highly correlated with several of the other factors tested, such as clay content and titratable acidity. The validity of small-scale measurements of NH3 volatilization from urea-fertilized fields has been questioned in the literature because vertical NH3 concentration gradients may change at the edge of the measurement plot and result in erroneously high emissions calculated from wind-tunnel NH3-flux measurements. This 'oasis effect' was studied using two, 22-m long wind tunnels constructed indoors over soil plots fertilized with surface-applied urea (20 g N m-2). Measurements of NH3 concentration in the air taken every 2 m along the tunnel were used to test for the oasis effect during two weeks following urea application. The NH3 flux calculated for each section of the tunnels did not indicate a reduction in the flux along the tunnels as predicted in the literature. The oasis effect was also tested for by analysing the shape of the air NH3 concentration vs. fetch profiles. Only 6% of the 62 measurement periods between the two tunnels when there was significant NH3 volatilization indicated the possibility of an oasis effect with a significant negative quadratic effect of fetch on NH3 concentration (P ≤ 0.05). For the other 94% of the NH3 volatilization periods, the NH3 concentration above the plot increased linearly with fetch (P ≤ 0.05), indicating the absence of the oasis effect for those periods. We also tested possible oasis effects by checking whether the NH3 flux was impacted by background air NH3 concentration inside the tunnel. The data from both tunnels was combined and analysed in four groups based on the background concentration difference, and none of the four groups indicated that the concentration difference was a significant regression parameter for flux difference in the tunnels (P ≤ 0.1). We propose that the absence of an oasis effect in the present study was the result of the dominant role of the NH3 source intensity over the air NH3 concentration as drivers of the volatilization rate. Our results indicate that wind tunnels measurements of NH3 volatilization over small surfaces fertilized using urea are not impacted by an oasis effect." --

Download or read book Egyptian Journal of Soil Science written by and published by . This book was released on 1995 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improving Efficiency of Urea Fertilizers by Inhibition of Soil Urease Activity written by S. Kiss and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of our present work is to review the fundamental studies on inhibition of soil urease activity and the applied studies on improving efficiency of urea fertilizers by inhibition of soil urease activity. The general literature on these topics covers 65 years, and the patent literature comprises a period of nearly 40 years. Studies related to inhibition of soil urease activity were performed in a great number of countries' well representing all the continents. Full texts of the papers describing these studies were published in one of 18 languages·'. The literature data reviewed are structured into 10 chapters, 81 subchapters, and 224 sections. The bibliographical list consists of 830 papers cited. ·In alphabetical order: Argentina, Armenia, Australia, Austria, Belgium, Belorussia, Brazil. Bulgaria, Canada, China, Costa Rica, Cuba. Czech RepUblic, Egypt, Estonia, France, Georgia (Gruzia), Germany, Hungary, India, Iraq, Ireland, Israel, Italy. Japan, Kazakhstan, Lithuania, Malaysia, Moldova, Netherlands, New Zealand, Pakistan, Philippines, Poland, Romania, Russia, Saudi Arabia, Slovakia, South Africa, South Korea, Spain, Sri Lanka. Sudan, Sweden, Thailand, Turkey, Ukraine, United Kingdom, United States of America. Uzbekistan .

Download or read book Fertilizers and Environment written by Claudio Rodriguez Barrueco and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food production remains the highest agricultural priority, subject to the constraint that it be done in harmony with nature, or at least with minimum environmental pollution. The amount of fertilizer applied can be controlled using modern application techniques, including soil and crop management, guaranteeing higher economic profit and lower environmental cost. It is in such a context that the present book addresses the efficient and rational use of mineral and organic fertilizers while preserving environmental quality. The book discusses the impact on surface and groundwaters, soils and crops, and experience of nitrate leaching, denitrification, ammonia volatilization, heavy metal pollution, agricultural and urban waste management, and international and national legislation. Audience: Agronomists, environmentalists, soil and food chemists, ecologists, policy makers, and managers in the fertilizer industry concerned with the trend of public opinion.

Download or read book The Effect of Urea Ammonium Sulfate and Organic Materials on Nitrite Accumulation and Gaseous Loss of Nitrogen in Acid Soil written by Siddangouda V. Patil and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study reported here is an endeavor to contribute to better understanding of the losses of nitrogen that may result with the application of nitrogen fertilizers in the presence and absence of organic material. Although much research has been conducted on the extent of nitrogen losses from the soil with the application of urea and ammonium sulfate, more information is needed on nitrogen transformations in soils, on type and mechanisms of gaseous losses of nitrogen, and on the influence of added organic material on such transformations and losses. Accordingly, experiments were conducted to investigate the effect of the application of urea and of ammonium sulfate with and without organic materials on nitrogen transformation and on the nature and extent of gaseous loss of nitrogen from acid soil.