Search Results - "KIRK, G. J. D."

Technologies for increasing carbon storage in soil to mitigate climate change by Whitmore, A. P, Kirk, G. J. D, Rawlins, B. G

“…Means to enhance storage of carbon in soil or avoid its loss from soil are discussed and examined from the viewpoint of policy. In particular, technologies…”
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Isotopic discrimination of zinc in higher plants by Weiss, D. J., Mason, T. F. D., Zhao, F. J., Kirk, G. J. D., Coles, B. J., Horstwood, M. S. A.

“…• The extent of isotopic discrimination of transition metals in biological processes is poorly understood but potentially has important applications in plant…”
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Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil by Izquierdo, M, Impa, S. M, Johnson‐Beebout, S. E, Weiss, D. J, Kirk, G. J. D

“…The changes in soil chemistry following submergence of a soil for rice production result in zinc (Zn) being immobilized in very insoluble forms. Consequently,…”
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Long-term increases in soil carbon due to ecosystem fertilization by atmospheric nitrogen deposition demonstrated by regional-scale modelling and observations by Tipping, E., Davies, J. A. C., Henrys, P. A., Kirk, G. J. D., Lilly, A., Dragosits, U., Carnell, E. J., Dore, A. J., Sutton, M. A., Tomlinson, S. J.

“…Fertilization of nitrogen (N)-limited ecosystems by anthropogenic atmospheric nitrogen deposition (N dep ) may promote CO 2 removal from the atmosphere,…”
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Comparative kinetic analysis of ammonium and nitrate acquisition by tropical lowland rice: implications for rice cultivation and yield potential by KRONZUCKER, H. J., GLASS, A. D. M., SIDDIQI, M. Y., KIRK, G. J. D.

“…Nitrogen limitation compromises the realization of yield potential in cereals more than any other single factor. In rice, the world's most important crop…”
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potential for nitrification and nitrate uptake in the rhizosphere of wetland plants: A modelling study by Kirk, G. J. D, Kronzucker, H. J

“…BACKGROUND AND AIMS: It has recently found that lowland rice grown hydroponically is exceptionally efficient in absorbing NO3(-), raising the possibility that…”
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dual porosity model of nutrient uptake by root hairs by Zygalakis, K. C., Kirk, G. J. D., Jones, D. L., Wissuwa, M., Roose, T.

“…• The importance of root hairs in the uptake of sparingly soluble nutrients is understood qualitatively, but not quantitatively, and this limits efforts to…”
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Root-Induced Iron Oxidation, pH Changes and Zinc Solubilization in the Rhizosphere of Lowland Rice by Kirk, G. J. D., Bajita, J. B.

“…Rice plants (Oryza sativa L., cv. IR34) were grown with their roots sandwiched between cylinders of an anaerobic low-Zn Mollisol. After periods of root-soil…”
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solution of convection-diffusion equations for solute transport to plant roots by Roose, T, Kirk, G. J. D

“…To help develop models of solute uptake that are computationally efficient and suitable for up-scaling to whole root systems, we provide three alternative…”
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Root-Induced Iron Oxidation and pH Changes in the Lowland Rice Rhizosphere by Begg, C. B. M., Kirk, G. J. D., Mackenzie, A. F., H.-U. Neue

“…Measurements of profiles of ferrous and ferric iron and pH in blocks of reduced soil in contact with planar layers of rice (Oryza sativa L.) roots are…”
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assessment of subsoil organic carbon stocks in England and Wales by Gregory, A. S, Kirk, G. J. D, Keay, C. A, Rawlins, B. G, Wallace, P, Whitmore, A. P

“…It is estimated that half the soil carbon globally is in the subsoil, but data are scarce. We updated estimates of subsoil organic carbon (OC) in England and…”
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Root-Induced Solubilization of Phosphate in the Rhizosphere of Lowland Rice by Saleque, M. A., Kirk, G. J. D.

“…Lowland rice (Oryza sativa L., cv IR74) was grown in cylinders of a P-deficient reduced Ultisol separated into upper and lower cells by a fine nylon mesh so…”
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Phosphorus cycling in rainfed lowland rice ecosystems on sandy soils by Pheav, S, Bell, R.W, Kirk, G.J.D, White, P.F

“…Phosphorus cycling in rainfed lowland rice ecosystems is poorly understood. Soil drying and grazing of rice straw during the long dry season, the growth of…”
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Spatial variation of ammonia volatilization from soil and its scale-dependent correlation with soil properties by Corstanje, R, Kirk, G.J.D, Pawlett, M, Read, R, Lark, R.M

“…Quantitative predictions of ammonia volatilization from soil are useful to environmental managers and policy makers and empirical models have been used with…”
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Baseline values and change in the soil, and implications for monitoring by Lark, R.M, Bellamy, P.H, Kirk, G.J.D

“…The soil is subject to change, and this must be monitored and understood. There are various circumstances in which the change in a soil property will depend in…”
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Can we model observed soil carbon changes from a dense inventory? A case study over England and Wales using three versions of the ORCHIDEE ecosystem model (AR5, AR5-PRIM and O-CN) by Guenet, B, Moyano, F. E, Vuichard, N, Kirk, G. J. D, Bellamy, P. H, Zaehle, S, Ciais, P

“…A widespread decrease of the topsoil carbon content was observed over England and Wales during the period 1978–2003 in the National Soil Inventory (NSI),…”
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Phosphate solubilization by organic anion excretion from rice growing in aerobic soil: rates of excretion and decomposition, effects on rhizosphere pH and effects on phosphate solubility and uptake by KIRK, G. J. D., SANTOS, E. E., SANTOS, M. B.

“…Rice (Oryza sativa) plants were grown with their roots sandwiched between thin layers of phosphorus-deficient soil from which they were separated by fine mesh,…”
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behaviour of soil process models of ammonia volatilization at contrasting spatial scales by Corstanje, R, Kirk, G.J.D, Lark, R.M

“…Process models are commonly used in soil science to obtain predictions at a spatial scale that is different from the scale at which the model was developed, or…”
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Digital soil assessment for quantifying soil constraints to crop production: a case study for rice in Punjab, India by Okonkwo, E. I., Corstanje, R., Kirk, G. J. D.

“…Assessments of land capability for particular functions such as food production need to allow for uncertainties both in the criteria used to specify the…”
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dynamic model of nutrient uptake by root hairs by Leitner, D., Klepsch, S., Ptashnyk, M., Marchant, A., Kirk, G. J. D., Schnepf, A., Roose, T.

“…Root hairs are known to be important in the uptake of sparingly soluble nutrients by plants, but quantitative understanding of their role in this is weak. This…”
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