Soil Research
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Lime requirement of acidic Queensland soils. I. Relationships between soil properties and pH buffer capacity
Soil Research - Tập 28 Số 5 - Trang 695 - 1990
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 regression
indicate...
Predicting pH buffering capacity of New Zealand soils from organic matter content and mineral characteristics
Soil Research - Tập 51 Số 6 - Trang 494 - 2013
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
buffer ca...
Inhibition of soil urease activity and nitrification with some metallic cations
Soil Research - Tập 24 Số 4 - Trang 527 - 1986
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
adversely affe...
The association of maghemite and corundum in Darling Range laterites, Western Australia
Soil Research - Tập 25 Số 3 - Trang 303 - 1987
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
(P < 0.01...
Atmospheric dust accession in South-Eastern Australia.
Soil Research - Tập 9 Số 1 - Trang 1 - 1971
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
content, an...
Small-scale, high-intensity rainfall simulation under-estimates natural runoff P concentrations from pastures on hill-slopes
Soil Research - Tập 46 Số 8 - Trang 694 - 2008
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 dearth
of info...
Carbon and phosphorus losses from dairy pasture in South Australia
Soil Research - Tập 39 Số 5 - Trang 969 - 2001
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 wettest year...
Losses of nitrogen in surface runoff from a plantation horticulture farm in coastal Queensland, Australia
Soil Research - Tập 47 Số 6 - Trang 565 - 2009
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
surface flo...
Effects of tillage practices on soil and water phosphorus and nitrogen fractions in a Chromosol at Rutherglen in Victoria, Australia
Soil Research - Tập 47 Số 1 - Trang 46 - 2009
Phosphorus (P) and nitrogen (N) exports from cropping areas can be greater than
those from uncropped areas. Conservation farming methods, involving minimal
tillage and full stubble retention, offer significant benefits to grain
cropping, but may increase nutrient concentrations in surface (i.e. 0–20 mm)
soils, resulting in increased risks of nutrient mobilisation and loss. The
effects of tillage a...
Field shrinkage curves of a swelling clay soil: analysis of multiple structural swelling and shrinkage phases in the prisms of a Vertisol
Soil Research - Tập 39 Số 1 - Trang 143 - 2001
The variations in the layer thickness of a Vertisol cropped with sugarcane were
recorded under natural conditions for several months. Drainage pipes were
installed at 1.10 m depth to drain water quickly from macro-cracks. The soil
gravimetric water content was measured from the surface to 1.10 m depth at
weekly intervals. The relation between soil water content and soil bulk specific
volume (shrin...
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