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soil organic matter level

Catalogue: GRDC Updates
Feedlot manure can provide half price nutrients.. With around 450,000 cattle on feed in Queensland, there is close to 500,000 tonnes of manure to be utilised as fertiliser each year... Potassium: K There is more than enough K when manure is used to supply P. Sorghum yielding 5 t/ha, has K removal around 22 kg/ha/yr, which means 170 kg of K in 10 t/ha of manure would last 7 years...
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Catalogue: Ground Cover
By Bob Freebairn Agricultural consultant, Coonabarabran NSW In long-term US trials, no-till corn grown continually for 39 years with high rates of nitrogen has not only yielded highest, but also has soil organic matter levels similar to adjoining permanent perennial grass pasture... Both no-till and cultivation-grown (mouldboard plough) corn with no nitrogen yielded less than half the moderate-to-full nitrogen fertiliser treatments and had lower soil organic matter levels in the upper 50 centimetres of the soil profile... Corn grown with no nitrogen has soil organic carbon levels - for both no-till and ploughing - more than 20 per cent lower than high-nitrogen-rate no-till or the permanent pasture...
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Catalogue: GRDC Publications
Soil organic matter contributes to a range of biological, chemical and physical properties of soil and is essential for soil health... Soils rarely reach their theoretical potential for organic matter storage (see Figure 1.7)... In soils with low clay content the amount of humus and resistant soil organic matter is increasingly important to nutrient exchange because its large surface area gathers (adsorbs) cations from the soil solution, holding nutrients that would otherwise leach...
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Catalogue: GRDC Publications
Soil organic carbon makes up about 58 per cent of the mass of organic matter and is usually reported in a soil analysis report as the concentration (i.e. per cent) of organic carbon in soil (see Chapter 1 for more detail)... If a soil has a significant amount of gravel or stone material, this fraction is removed before analysis with the final soil carbon or nutrient assessment being only representative of the mineral component of the remaining soil... Understanding how organic matter cycles through the soil and what drives its accumulation and loss is critical to maintaining it at optimal levels within agricultural systems...
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Catalogue: Broadacre Field Crops DAFF QLD
An infected plant showing white mould that has turned brown after a period of time... White mould: Note the sclerotes, which are spherical and white then turn brown... White mould is appearing where crops have been well-rotated, soil organic matter levels appear high and where stubble is retained on the soil surface...
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Catalogue: Broadacre Field Crops DAFF QLD
An infected plant showing white mould that has turned brown after a period of time... White mould: Note the sclerotes, which are spherical and white then turn brown... White mould is appearing where crops have been well-rotated, soil organic matter levels appear high and where stubble is retained on the soil surface...
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Catalogue: Broadacre Field Crops DAFF QLD
An infected plant showing white mould that has turned brown after a period of time... White mould: Note the sclerotes, which are spherical and white then turn brown... White mould is appearing where crops have been well-rotated, soil organic matter levels appear high and where stubble is retained on the soil surface...
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