Results 221 to 230 of about 20,584 (260)

Ammonia Volatilization From Soils: Equilibrium Considerations

Soil Science Society of America Journal, 1977
Abstract The volatilization of ammonia from soils as a function of the system's properties is analyzed theoretically and experimentally. The final concentration of ammonium held by the soil increases with an increase in hydrogen ion activity, with the initial ammonium concentration, and with partial pressure of ammonia in the air.
Yoram Avnimelech, Malka Laher
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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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Modeling Ammonia Volatilization from Surface‐Applied Swine Effluent

Soil Science Society of America Journal, 2003
Ammonia volatilization is an important issue in agricultural production and environmental protection. Experimental methods and numerical models exist to estimate the rate and amount of ammonia volatilization from commercial fertilizers and animal manures applied to a field.
J. Wu, D. L. Nofziger, J. G. Warren, J. A. Hattey   +3 more
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Ammonia volatilization loss from surface applied livestock manure

Journal of Environmental Science and Health, Part B, 2009
Ammonia (NH(3)) emission from livestock manures used in agriculture reduces N uptake by crops and negatively impacts air quality. This laboratory study was conducted to evaluate NH(3)emission from different livestock manures applied to two soils: Candler fins sand (CFS; light-textured soil, pH 6.8 and field capacity soil water content of 70 g kg(-1 ...
S, Paramasivam, K, Jayaraman, Takela C, Wilson, Ashok K, Alva, Luma, Kelson, Leandra B, Jones   +5 more
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Ammonia Volatilization from Soils¹

Agronomy Journal, 1974
AbstractIf NH4+‐N fertilizers are used, most agronomic crops grow best if the soil reaction is near neutrality. Previous studies have shown that if the soil pH becomes alkaline, NH3 volatilization losses of N occurs. The objective of this study was to determine whether or not a rapidly growing crop could reduce the volatilization losses of N ...
Harry A. Mills, Allen V. Barker, Donald N. Maynard   +2 more
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Ammonia volatilization from drill sown rice bays

Fertilizer Research, 1988
Ammonia volatilization losses and other N transformations were studied in drill sown rice bays fertilized with urea at various times between permanent flooding (PF) and panicle initiation (PI). Ammonia loss was measured directly with flow chambers and indirectly through application of Freney et al.'s (1985) model. Both techniques indicated that ammonia
P. E. Bacon, E. H. Hoult, L. G. Lewin, J. W. Mcgarity   +3 more
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Characteristics of Ammonia Volatilization from Spring Wheat

Crop Science, 1989
The gaseous exchange of NH3 between plants and the atmosphere is important in the N budgets of agricultural cropping systems, yet the physiological bases underlying plant NH3 fluxes remain obscure. The objective of this study is to describe NH3 fluxes from shoots of well fertilized growth‐chamber grown wheat (Triticum aestivum L.) plants from early ...
Jack A. Morgan, William J. Parton
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Ammonia volatilization from urine patches in grassland

1987
Ammonia (NH3) volatilization from artificial urine applied to perennial ryegrass (Lolium perenne L.) pastures was measured during the grazing season of 1986. The amount of NH3 volatilized in 10 days after application ranged from 7–12% of nitrogen (N) applied at a urine-N application rate equivalent to 285 kg N ha-1 and from 4–18% for an application ...
N. Vertregt, B. Rutgers
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Ammonia Volatilization from Flooded Rice Soils

Soil Science Society of America Journal, 1979
D. S. Mikkelsen, S. K. DeDatta
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Ammonia volatilization from slurry land spreading

1994
Ammonia volatilization following the spreading of animal slurries on lands contributes to reduce the value of slurry as a source of nitrogen and can have repercussions on the wider environment. Field and laboratory studies were carried out to specify (i) the magnitude of ammonia emissions and (ii) the factors that influence the process of ammonia ...
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