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deep drainage

Catalogue: GRDC Final Reports
The study reviewed the effect on groundwater response and crop improvement at four sites over a limited period of time (2-5 seasons), during dry conditions... DrainLogic has been evaluated on several of the current (Beynon Rd, Morawa, Pithara, Beacon) and partner (e.g. Wallatin Creek, Dumbleyung) trial sites... The result of the analyses has been to develop the classification of the subsoil and soil used in DrainLogic...
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Catalogue: GRDC Final Reports
The treatments included harvesting the stubble for straw, standing vs. flattened stubble, and early or late control of summer weeds... Further testing would be beneficial... We encourage measurements of soil water status as these integrate the effects of all these factors...
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Catalogue: GRDC Updates (North)
Coolah Grains Research Update Soils, salinity and the future!.. In summary controlled traffic and conservation tillage will assist in protecting the surface of the soil and will maximise the activity of soil animals, increasing the infiltration and the water holding capacity of the soil... Grains Research Update - Coolah August 2002 any person acting or relying on any data, information, opinion or advice expressed or implied in this document...
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Catalogue: GRDC Updates (South)
Coolah Grains Research Update Soils, salinity and the future!.. In summary controlled traffic and conservation tillage will assist in protecting the surface of the soil and will maximise the activity of soil animals, increasing the infiltration and the water holding capacity of the soil... Grains Research Update - Coolah August 2002 any person acting or relying on any data, information, opinion or advice expressed or implied in this document...
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Catalogue: GRDC Updates (North)
Risk is assessed for a crop rotations at Goondiwindi which has 75% winter (wheat, barley, chickpea), and 25% summer (sorghum, dryland cotton, mung beans).. We need to determine the time and place where deep drainage and dissolved salts might ultimately discharge and cause economic and environmental damage... From a soil coring expedition around Walgett and Coonamble, early results suggest that deep drainage is ~5 mm/year under cropping...
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Catalogue: GRDC Updates (South)
Risk is assessed for a crop rotations at Goondiwindi which has 75% winter (wheat, barley, chickpea), and 25% summer (sorghum, dryland cotton, mung beans).. We need to determine the time and place where deep drainage and dissolved salts might ultimately discharge and cause economic and environmental damage... From a soil coring expedition around Walgett and Coonamble, early results suggest that deep drainage is ~5 mm/year under cropping...
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Catalogue: GRDC Final Reports
The project has demonstrated that summer fallow management can play an important role in regulating soil moisture storage, either to reduce the risk of deep drainage, or to benefit the crop... The lysimeter experiments showed that a 4 t/ha residue cover past sowing (early and mid June) could reduce evaporation losses by approximately 10 mm in 2005 (see Fig. A2) and 15 mm in 2006... To minimise the risk of deep drainage, residue retention should be avoided as much as possible and residue loads reduced to 1 t/ha or less, unless required for other purposes (e.g. erosion control)...
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Catalogue: GRDC Updates
DRYLAND SALINITY The clearing of natural perennial vegetation including native grasses, trees and shrubs and replacement by annual crops and pastures may reduce annual transpiration and increase water stored in the soil profile, resulting in increased risk of deep drainage... DEEP DRAINAGE UNDER VARIOUS VEGETATION SYSTEMS Experiments were established in May 2004 to quantify the water balance and potential deep drainage occurring on two key ground flow systems of the Wimmera catchment of Victoria, southern Australia... Native pasture systems were believed to minimise deep drainage this research demonstrates that the ability of native pasture to survive dry conditions, which prevailed during this experiment, was due to physiological dormancy during periods of water stress rather than a deeper rooting system enabling extraction of moisture from deeper in the profile...
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