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soil fertility

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: 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
Williams and Lipsett (1961) found that 50-60 years of wheat cultivation in NSW resulted in a loss of 30% of organic C but only 17% organic P. In natural soils the extent of net immobilization of P in organic matter and probably soil organic matter levels may often be set by the P supply in the parent material... Many authors only consider supply to occur by mass flow and diffusion (the interception component in Table 2.2 is combined with the diffusion component)... Plants can access a greater volume of soil through the formation of a mycorrhizal symbiosis...
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Catalogue: GRDC Updates
" Date: 08.10.2009 USING ROTATION CROPS TO IMPROVE SOIL QUALITY.. Soil structural differences are measured with a cone penetrometer which determines the force needed to push a metal probe slowly into the soil to 600 mm depth... We measured the microbial properties using surface soil samples (0-10 cm) from the crop rotation experiment...
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Catalogue: GRDC Factsheets
Soil type is useful in deducing the risk of micronutrient deficiencies... introduction A recent study undertaken by the International Crop demand and uptake Micronutrients are essential for healthy Plant Nutrition Institute (IPNI) on behalf of the Different crop species have different plant growth... Oats, wheat, barley (canola tolerant) SOurCe: rOB nOrTOn, iPni y e n t i w w e h t t a M : o t o h p Copper is a key element of chlorophyll and plays a central role in photosynthesis, and deficiencies are often associated with high organic matter soils...
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Catalogue: GRDC Updates (North)
Quirindi Grains Research Update Nutrition on black soil.. Grains Research Update - Quirindi August 2002 there is drought prior to flowering and a low number of kernels are set then the kernels which are produced will tend to be larger... 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...
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Catalogue: GRDC Updates (South)
Quirindi Grains Research Update Nutrition on black soil.. Grains Research Update - Quirindi August 2002 there is drought prior to flowering and a low number of kernels are set then the kernels which are produced will tend to be larger... 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...
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Catalogue: GRDC Updates
Soil factors affecting micronutrient availability... Even though needed in small quantities, Copper (Cu), Manganese (Mn), Iron (Fe), Zinc (Zn), Boron (B) and Molybdenum (Mo) are all essential for plant growth, although the demand is small relative to nitrogen and phosphorus... The discussion aims to review these issues relative to micronutrients...
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Catalogue: GRDC Updates
Calcium (Ca) plays essential roles in both plant nutrition and soil health... Nutritional responses to Ca can occur with sensitive crops in acid soils with low cation exchange capacity in high rainfall zones... Calcium (Ca) is an essential plant nutrient required by animals and plants in relatively large amounts for healthy growth...
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