Results 211 to 220 of about 2,873 (250)

Membrane-based conductivity probe for real-time in-situ monitoring rice field ammonia volatilization

Sensors and Actuators B: Chemical, 2019
Reliable real-time and in-situ monitoring of ammonia volatilization could provide invaluable information in improving agriculture ammonia fertilizer utilization efficiency and solving ammonia relevant environmental issues, however, few applicable ...
Tianling Li, Jianyin Huang, Yonghong Wu   +2 more
exaly   +2 more sources

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Evaluation of Ammonia Volatilization in the Field

Journal of Production Agriculture, 1988
Until about 10 years ago, NH, volatilization had been studied primarily under controlled laboratory conditions. However, the recent development of methods to measure NH3 losses under field conditions has led to a much improved understanding of NH3 volatilization and the factors which influence it.
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Ammonia volatilization from flooded soils

Fertilizer Research, 1981
Ammonia volatilization from flooded soils has been studied for over half a century. In reviewing the literature on this subject, it becomes clear that there is no consensus on the importance given to this loss mechanism. In part, the differences of opinion can be explained by the fact that ammonia losses were studied in different environments, but to a
Paul Vlek, Eric T Craswell
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Ammonia Volatilization of Winter Spread Manure

Transactions of the ASAE, 1979
ABSTRACT LABORATORY and field experiments were con-ducted to determine ammonia volatilization rates from winter spread manure. Factors considered were manure application rate, freeze-thaw cycles, dehydration, and the urea-ammonium conversion rate. Freezing did not increase the volatilization rate. Drying was not required for volatilization.
null T. S. Steenhuis, null G. D. Bubenzer, null J. C. Converse   +2 more
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Ammonia Volatilization in a Hypertrophic Prairie Lake

Canadian Journal of Fisheries and Aquatic Sciences, 1981
During two periods of high pH and high ammonia concentrations, disappearance rates of ammonia of 20–30 μg N∙L−1∙h−1 were observed in Lake 885, a hypertrophic prairie lake. At these times, rates of ammonia uptake by phytoplankton were 2.6–4.3 μg N∙L−1∙h−1 as measured by a 15N method.
T. P. Murphy, B. G. Brownlee
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Effect of Phenylphosphorodiamidate on Immobilization and Ammonia Volatilization

Soil Science Society of America Journal, 1987
Abstract Laboratory incubation experiments were conducted to evaluate the ability of the urease inhibitor phenylphosphorodiamidate (PPD) to reduce NH 3 volatilization and immobilization of urea (100 mg N kg −1 of soil).
L. L. Hendrickson, T. E. Omholt, M‐J. O'Connor   +2 more
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A SIMULATION MODEL OF AMMONIA VOLATILIZATION IN COMPOSTING

Transactions of the ASAE, 2004
A model to simulate substrate decomposition and ammonia volatilization during the high-rate stage of composting was developed. The model linked the dynamics of microbial populations to carbon and nitrogen transformation during the composting process.
null Y. Liang, null J. J. Leonard, null J. J. Feddes, null W. B. McGill   +3 more
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Influence of carbon and buffer amendment on ammonia volatilization in composting

Bioresource Technology, 2006
Laboratory-scale experiments were carried out to test a mathematical model of the nitrogen dynamics in a composting process. The main ingredients of composting materials were wheat straw and dairy manure. The influence of (a) two carbon amendments, i.e.
Y, Liang, J J, Leonard, J J R, Feddes, W B, McGill   +3 more
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Solubility of volatile organic compounds in aqueous ammonia solution

Chemosphere, 2005
The Ostwald solubility coefficient, L of 17 volatile organic compounds (VOCs) from the gas phase into water and dilute aqueous ammonia solutions was determined by the equilibrium partitioning in closed system-solid phase micro extraction (EPICS-SPME) method at 303 K and at 0-2.5 mol dm(-3) ammonia concentrations. Ammonia increased the solubility of all
Miklós, Görgényi, Jo, Dewulf, Herman, Van Langenhove, Zoltán, Király   +3 more
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Ammonia volatilization from compound nitrogen-sulfur fertilizers

1993
Co-granulated urea and ammonium sulfate (AS) offer the potential for supplying both nitrogen (N) and sulfur (S) in a form readily available for plant uptake. Possible effects of a partial substitution of urea by AS on urea hydrolysis and ammonia (NH3) volatilization were examined in laboratory experiments.
Oenema, O., Velthof, G.L.
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