Search Results - "Hedley, M.J."

Seasonal prediction of in situ pasture macronutrients in New Zealand pastoral systems using hyperspectral data by Sanches, I.D, Tuohy, M.P, Hedley, M.J, Mackay, A.D

“…To evaluate the ability of field remote sensing for predicting pasture macronutrients, hyperspectral reflectance data between 350 and 2500 nm were acquired…”
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Transformation of nitrogen and nitrous oxide emission from grassland soils as affected by compaction by Bhandral, R., Saggar, S., Bolan, N.S., Hedley, M.J.

“…Animal trampling is one of the main factors responsible for soil compaction under grazed pastures. Soil compaction is known to change the physical properties…”
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Environmental hazards of fluoride in volcanic ash: a case study from Ruapehu volcano, New Zealand by Cronin, Shane J, Neall, V.E, Lecointre, J.A, Hedley, M.J, Loganathan, P

“…The vent-hosted hydrothermal system of Ruapehu volcano is normally covered by a c. 10 million m 3 acidic crater lake where volcanic gases accumulate. Through…”
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mobilisation and fate of soil and rock phosphate in the rhizosphere of ectomycorrhizal Pinus radiata seedlings in an Allophanic soil by Liu, Q, Loganathan, P, Hedley, M.J, Skinner, M.F

“…Phosphorus (P) characteristics and the fate of a finely divided Sechura phosphate rock (SPR) applied to a P deficient Allophanic Soil (Andosol) were…”
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Phosphorus efficiency and the forms of soil phosphorus utilized by upland rice cultivars by Hedley, M.J. (International Rice Research Inst., Manila (Philippines)), Kirk, G.J.D, Santos, M.B

“…Experimental measurements of phosphorus (P) uptake and the forms of soil P depleted from an Ultisol by 6 upland rice cultivars are reported. In both…”
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A technique for studying rhizosphere processes in tree crops: Soil phosphorus depletion around camellia (Camellia japonica L) roots by Zoysa, A.K.N. (Massey Univ., Palmerston North (New Zealand). Dept. of Soil Science), Loganathan, P, Hedley, M.J

“…Rhizosphere studies on tree crops have been hampered by the lack of a satisfactory method of sampling soils at various distances in the rhizosphere. A modified…”
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Denitrification losses of N from fresh and composted manures by Mahimairaja, S., Bolan, N.S., Hedley, M.J.

“…Biological denitrification is the microbial reduction of nitrate or nitrite to nitrous oxide (N sub(2)O) and molecular nitrogen (N sub(2)). Loss of N through…”
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Soil fauna in grazed New Zealand hill country pastures at two management intensities by Schon, N.L., Mackay, A.D., Minor, M.A., Yeates, G.W., Hedley, M.J.

“…This study examined the influence of superphosphate fertiliser application and sheep stocking rate on the density and diversity of soil macro- and mesofauna,…”
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Predicting pasture root density from soil spectral reflectance: field measurement by KUSUMO, B.H, HEDLEY, M.J, HEDLEY, C.B, ARNOLD, G.C, TUOHY, M.P

“…This paper reports the development and evaluation of a field technique for in situ measurement of root density using a portable spectroradiometer. The…”
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use of Vis-NIR spectral reflectance for determining root density: evaluation of ryegrass roots in a glasshouse trial by Kusumo, B.H, Hedley, M.J, Hedley, C.B, Hueni, A, Arnold, G.C, Tuohy, M.P

“…This paper reports the use of visible/near-infrared reflectance spectroscopy (Vis-NIRS) to predict pasture root density. A population of varying grass root…”
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Fluoride accumulation in pasture forages and soils following long-term applications of phosphorus fertilisers by Loganathan, P., Hedley, M.J., Wallace, G.C., Roberts, A.H.C.

“…Phosphorus fertilisers increase the accumulation of F in surface soils without affecting plant uptake. Ingestion of soils with high fluoride (F) concentration…”
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Assessment of the relative agronomic effectiveness of phosphate rocks under glasshouse conditions by Saggar, S., Hedley, M. J., White, R. E., Gregg, P. E. H., Perrott, K. W., Cornforth, I. S.

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Effect of Mycorrhizal Inoculation on Rhizosphere Properties, Phosphorus Uptake and Growth of Pine Seedlings Treated With and Without a Phosphate Rock Fertilizer by Liu, Q, Loganathan, P, Hedley, M.J, Grace, L.J

“…A pot trial was carried out for 10 months to investigate the effects of ectomycorrhizal (ECM) fungal infection and phosphorus (P) fertilization on the growth…”
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Chemical fractionation to characterize changes in sulphur and carbon in soil caused by management by Bhupinderpal-Singh, Hedley, M.J., Saggar, S., Francis, G.S.

“…Summary Classical chemical fractionation of soil sulphur (S) into HI‐reducible S and carbon‐bonded S does not separate S in soil into fractions that have…”
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Chapter 14 Techniques for assessing nutrient bioavailability in soils: Current and future issues by Hedley, M.J.

“…This chapter discusses some selected techniques used to quantify nutrient acquisition by plant roots. In terms of developing techniques to assess nutrient…”
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Characterization of recently 14C pulse-labelled carbon from roots by fractionation of soil organic matter by Bhupinderpal-Singh, Hedley, M.J, Saggar, S

“…Summary The inability of physical and chemical techniques to separate soil organic matter into fractions that have distinct turnover rates has hampered our…”
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Downward movement of cadmium and phosphorus from phosphatic fertilisers in a pasture soil in New Zealand by Loganathan, P., Hedley, M.J.

“…Total cadmium (Cd) and phosphorus (P) concentrations in a pastoral soil, amended annually for 10 years with four forms of P fertilisers, decreased with soil…”
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Influence of ectomycorrhizal hyphae on phosphate fractions and dissolution of phosphate rock in rhizosphere soils of Pinus radiata by Liu, Q, Loganathan, P, Hedley, M.J

“…A study was conducted to determine the effect of ectomycorrhizal hyphae on phosphate rock dissolution and soil properties in the rhizosphere of one-year-old…”
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Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures by Bolan, N.S. (Massey Univ., Palmerston North (New Zealand). Fertilizer and Lime Research Centre), Hedley, M.J, White, R.E

“…In areas that remain unaffected by industrial pollution soil acidification is mainly caused by the release of protons (H⁺) during the oxidation of carbon (C),…”
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Field evaluation of the liming value of two phosphate rocks and their partially acidulated products after 16 years of annual application to grazed pasture by Loganathan, P, Hedley, M.J, Bolan, N.S, Currie, L.D

“…Measuring pH of soil samples (at four to five depths down to 300 mm) collected three times from a long-term (16 years) field trial involving annual application…”
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