Search Results - "Freney, J R"

Determination and mitigation of ammonia loss from urea applied to winter wheat with N-(n-butyl) thiophosphorictriamide by Turner, D.A., Edis, R.B., Chen, D., Freney, J.R., Denmead, O.T., Christie, R.

“…This study conducted in the Wimmera, a major cropping area in western Victoria Australia, evaluated a backward Lagrangian stochastic (bLs) dispersion model for…”
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Ammonia volatilization from nitrogen fertilizers applied to cereals in two cropping areas of southern Australia by Turner, D. A., Edis, R. E., Chen, D., Freney, J. R., Denmead, O. T.

“…As farmers in southern Australia typically apply nitrogen (N) to cereal crops by top-dressing with ammonia (NH 3 ) based fertilizer in late winter or early…”
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Gas exchange between plant canopies and the atmosphere: Case-studies for ammonia by Denmead, O.T., Freney, J.R., Dunin, F.X.

“…We first present the elements of an inverse Lagrangian model of gas transport in plant canopies. The model allows the inference of sites of gas exchange in the…”
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Direct measurements of methane emissions from grazing and feedlot cattle by Harper, L. A, Denmead, O. T, Freney, J. R, Byers, F. M

“…Methane (CH4) emissions from animals represent a significant contribution to anthropogenically produced radiatively active trace gases. Global and national CH4…”
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Impacts of population growth, changing food preferences and agricultural practices on the nitrogen cycle in East Asia by Xiong, Z. Q, Freney, J. R, Mosier, A. R, Zhu, Z. L, Lee, Y, Yagi, K

“…While increasing population and changing food preferences have changed agriculture in some East Asian countries to high input systems with greater use of…”
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Nitrous oxide emissions from agricultural fields: assessment, measurement and mitigation by Mosier, A.R. (USDA-ARS, Fort Collins, CO (USA)), Duxbury, J.M, Freney, J.R, Heinemeyer, O, Minami, K

“…In this paper we discuss three topics concerning N₂O emissions from agricultural systems. First, we present an appraisal of N₂O emissions from agricultural…”
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Options for reducing the negative effects of nitrogen in agriculture by Freney, J R

“…After addition to farms by fertilizer, crop residues, biological fixation and animal excreta, nitrogen can be lost through gaseous emission, runoff and…”
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A mass balance method for non-intrusive measurements of surface-air trace gas exchange by Denmead, O.T., Harper, L.A., Freney, J.R., Griffith, D.W.T., Leuning, R., Sharpe, R.R.

“…A mass balance method is described for calculating gas production from a surface or volume source in a small test plot from measurements of differences in the…”
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Agriculture and the nitrogen cycle: assessing the impacts of fertilizer use on food production and the environment by Mosier, Arvin, Syers, John K. (John Keith), Freney, J. R. (John Raymond)

“…This assessment of the role of nitrogen fertilizer in the nitrogen cycle has a regional focus, emphasizing the need to maintain food production while…”
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Emission of nitrous oxide from soils used for agriculture by Freney, J R

“…Nitrous oxide is emitted into the atmosphere as a result of biomass burning, and biological processes in soils. Biomass burning is not only an instantaneous…”
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Verifying inventory predictions of animal methane emissions with meteorological measurements by DENMEAD, O. T, LEUNING, R, GRIFFITH, D. W. T, JAMIE, I. M, ESLER, M. B, HARPER, L. A, FRENEY, J. R

“…The paper examines the strengths and weaknesses of a rangeof meteorological flux measurement techniques that mightbe used to verify predictions of greenhouse…”
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Mitigating agricultural emissions of methane by Mosier, A R, Duxbury, J M, Freney, J R, Heinemeyer, O, Minami, K, Johnson, DE

“…Agricultural crop and animal production systems are important sources and sinks for atmospheric methane (CH4). The major CH4 sources from this sector are…”
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Effect of fertilizer placement on nitrogen loss from sugarcane in tropical Queensland by Prasertsak, P, Freney, J.R, Denmead, O.T, Saffigna, P.G, Prove, B.G, Reghenzani, J.R

“…This paper reports on the fate of nitrogen (N) in a first ratoon sugarcane (Saccharum officinarum L.) crop in the wet tropics of Queensland when urea was…”
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Estimation of nitrification rates in flooded soils by Chen, D.L. (University of Melbourne, Parkville, Australia.), Chalk, P.M, Freney, J.R, Smith, C.J, Luo, Q.X

“…Three techniques for estimating nitrification rates in flooded soils were evaluated in short-term incubation experiments using three soils. The techniques were…”
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Strategies to reduce gaseous emissions of nitrogen from irrigated agriculture by Freney, J.R

“…Fertilizer nitrogen (N) is not used efficiently in irrigation agriculture because much of the N applied is lost from the plant-soil system by emission of…”
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Estimating ammonia volatilization from flooded rice fields by simplified techniques by Freney, J.R, Leuning, R, Simpson, J.R, Denmead, O.T, Muirhhead, W.A

“…Two simplified methods for assessing the emission of ammonia, from fertilized, flooded rice (Oryza sativa L. cv. Inga) fields without affecting the plant's…”
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Diagnosing sulfur deficiency in rice by grain analysis by Randall, P J, Freney, J R, Spencer, K

“…The effect of varying the sulfur (S) and nitrogen (N) supply on theyield and composition of brown rice (Oryza sativa L.)grainwas studied to determine whether…”
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Fate of urea nitrogen applied to a banana crop in the wet tropics of Queensland by Prasertsak, P, Freney, J R, Saffigna, P G, Denmead, O T, Prove, B G

“…This paper reports a study in the wet tropics of Queensland on the fate of urea applied to a dry or wet soil surface under banana plants. The transformations…”
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Effects of phenylphosphorodiamidate and dicyandiamide on nitrogen loss from flooded rice by Simpson, J.R, Freney, J.R, Muirhead, W.A, Leuning, R

“…The effects of a urease inhibitor, phenylphosphorodiamidate (PPD), and a nitrification inhibitor, dicyandiamide (DCD), on the losses, tranformations, and…”
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Emission of nitrogen oxides (NOx) from a flooded soil fertilized with urea: relation to other nitrogen loss processes by GALBALLY, I. E, FRENEY, J. R, MUIRHEAD, W. A, SIMPSON, J. R, TREVITT, A. C. F, CHALK, P. M

“…Emissions of nitrogen oxides from a flooded rice field were studied after urea had been broadcast into the floodwater. The NOx flux from the fertilized area…”
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