Lime requirement of acidic Queensland soils. I. Relationships between soil properties and pH buffer capacitySoil Research - Tập 28 Số 5 - Trang 695 - 1990
R. L. Aitken, P. W. Moody, PG Mckinley
The pH buffer capacity of 40 acidic surface soils (pHw <6.5) was determined from soil-CaCO3- moist incubations. Buffer capacity values ranged from 02 to 5.4 g CaCO3 kg-1 soil unit-1 pH increase. Organic carbon, clay content, ECEC, 1M KCl extractable acidity and Al, and the change in CEC with pH (�CEC) were measured and correlated with pH buffer capacity. Step-up multiple linear regress...... hiện toàn bộ
Predicting pH buffering capacity of New Zealand soils from organic matter content and mineral characteristicsSoil Research - Tập 51 Số 6 - Trang 494 - 2013
D. Curtin, Stephen Trolove
Information on the pH buffer capacity of soil is required to estimate changes in pH due to acidic or alkaline inputs, and to model pH-dependent processes within the soil nitrogen (N) cycle. The objective was to determine whether a model based on soil organic matter (SOM) and mineral characteristics (clay content, extractable iron (Fe) and aluminium (Al)) would be adequate to estimate the...... hiện toàn bộ
Inhibition of soil urease activity and nitrification with some metallic cationsSoil Research - Tập 24 Số 4 - Trang 527 - 1986
DS Yadav, Vikash Kumar, Mahendra Singh
Investigations to study the effects of 14 metallic cations on urease activity and nitrification rate in Hansi clay loam (Typic Ustochrepts) were undertaken at Haryana Agricultural University, Hissar, Haryana (India). The metallic cations inhibited soil urease activity, and the order of effectiveness varied when compared at 100, 500 and 1000 ppm. Increasing levels of metallic cations advers...... hiện toàn bộ
The association of maghemite and corundum in Darling Range laterites, Western AustraliaSoil Research - Tập 25 Số 3 - Trang 303 - 1987
R. R. Anand, R. J. Gilkes
Maghemite in Darling Range lateritic duricrust ranges from 2 to 10% in abundance, contains less than 5 mole % Al and occurs as aggregates of very small ~ 150 A subrounded platy crystals. Corundum is also present, ranging from 1 to 3.5% in abundance, and it contains less than 3 mole % Fe and occurs as rounded (~250 A) crystals. The maghemite and corundum contents are positively correlated ...... hiện toàn bộ
Atmospheric dust accession in South-Eastern Australia.Soil Research - Tập 9 Số 1 - Trang 1 - 1971
PH Walker, A. B. Costin
Reddish dust, transported by strong winds from the dry central regions of Australia, is periodically deposited in the humid eastern part of the continent. Dust sampled in snow on the Australian alps during 1968 is comparable in amount with accession reported earlier in the 1900's in New Zealand and Melbourne. The dust reported here has a median diameter of 4 pm, relatively high organic con...... hiện toàn bộ
Small-scale, high-intensity rainfall simulation under-estimates natural runoff P concentrations from pastures on hill-slopesSoil Research - Tập 46 Số 8 - Trang 694 - 2008
Warwick J. Dougherty, David Nash, Jim Cox, David J. Chittleborough, Nigel Fleming
Rainfall simulation is a widely used technique for studying the processes, and quantifying the mobilisation, of phosphorus (P) from soil/pasture systems into surface runoff. There are conflicting reports in the literature of the effects of rainfall simulation on runoff P concentrations and forms of P compared to those under natural rainfall runoff conditions. Furthermore, there is a dear...... hiện toàn bộ
Carbon and phosphorus losses from dairy pasture in South AustraliaSoil Research - Tập 39 Số 5 - Trang 969 - 2001
Nigel Fleming, Jim Cox
Runoff (overland flow and A/B horizon interflow) was measured from 2
grazed dairy pastures at Flaxley, South Australia, from 1996 to 1998. Runoff
ranged from 0.4% to 10% of annual rainfall and
>90% of this was overland flow. Phosphorus and carbon were
measured in runoff. As much as 2.3 kg/ha of phosphorus and 10.7 kg/ha
of total dissolved carbon were lost from the subcatchments in the ...... hiện toàn bộ
Losses of nitrogen in surface runoff from a plantation horticulture farm in coastal Queensland, AustraliaSoil Research - Tập 47 Số 6 - Trang 565 - 2009
P. R. Stork, Daniel Lyons, M. J. Bell
Surface losses of nitrogen from horticulture farms in coastal Queensland, Australia, may have the potential to eutrophy sensitive coastal marine habitats nearby. A case-study of the potential extent of such losses was investigated in a coastal macadamia plantation. Nitrogen losses were quantified in 5 consecutive runoff events during the 13-month study.
Irrigation did not contribute to s...... hiện toàn bộ