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annual crop

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Catalogue: GRDC Media
Recent Grains Research and Development Corporation-funded (GRDC) research in the northern region shows native remnant vegetation measures around three per cent soil organic carbon (OC) in the top 10 centimetres of the soil... Soil that has been cropped long term is about 1% OC, which indicates long term cropping has decreased OC by 2%.This is a massive drop in the real value of land... A 2% decrease equates to at least 20 tonnes per hectare of OC lost from the soil (assuming bulk density of only 1.0)...
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Catalogue: GRDC Updates (West)
KEYMESSAGES During the crop growing season, there was little difference in soil water under annual crop, perennial pasture, and pasture-cropped plots... In the paper, we concentrate on plots in which neutron moisture meter access tubes were installed... Deep drainage beyond a depth of 3.0 m was calculated from rainfall (measured on-site with a tipping-bucket rain gauge), ET 0(Allen et al. 1998) and change in soil moisture storage...
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Catalogue: GRDC Publications
Assuming a single soil evaporation parameter to benchmark water use efficiency is a very coarse simplification, and possibly the main source of error in estimating water use efficiency using the French and Schultz approach... Selecting a variety to match to a time of sowing so that flowering occurs during the flowering window is an important management decision to improve yield and water use efficiency... The effect of sowing rate on water use efficiency in winter cereals is strongly influenced by the amount of soil moisture leading into spring...
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Catalogue: GRDC Media
Call for croppers to protect organic carbon.. Along with nutrient supply, healthy soils rely on the physical and biological benefits of OC for crops and pastures, such as water holding capacity on lighter soils and disease suppression, he says... Dr Lawrence says in higher rainfall areas (more than 700 millimetres per annum) there is potential to maintain OC at higher levels using an intensive no till opportunity cropping system which relies on converting a high percentage of rainfall into plant growth...
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Catalogue: GRDC Media
"Annual crops reduce OC because they produce less dry matter than perennial native systems and only 25pc of fallow rainfall is used by the subsequent crop," he said... Along with nutrient supply, healthy soils rely on the physical and biological benefits of OC for crops and pastures, such as water holding capacity on lighter soils and disease suppression, he says... Dr Lawrence says in higher rainfall areas (more than 700 millimetres per annum) there is potential to maintain OC at higher levels using an intensive no till opportunity cropping system which relies on converting a high percentage of rainfall into plant growth...
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