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soil analysis

Catalogue: Broadacre Field Crops DAFF QLD
Application of fertilisers to meet crop demand is only a part of developing a crop nutrition plan... Most of the nutrients taken up by cotton from the soil are derived from the decomposition of previous crop residues, soil microorganisms and soil organic matter... Salinity is measured by testing the soil solutions electrical conductivity (CEC)...
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Catalogue: Broadacre Field Crops DAFF QLD
Application of fertilisers to meet crop demand is only a part of developing a crop nutrition plan... Most of the nutrients taken up by cotton from the soil are derived from the decomposition of previous crop residues, soil microorganisms and soil organic matter... Salinity is measured by testing the soil solutions electrical conductivity (CEC)...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Application of fertilisers to meet crop demand is only a part of developing a crop nutrition plan... Most of the nutrients taken up by cotton from the soil are derived from the decomposition of previous crop residues, soil microorganisms and soil organic matter... Salinity is measured by testing the soil solutions electrical conductivity (CEC)...
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Catalogue: GRDC Updates
Crop Use of Fertiliser, Topsoil and Subsoil P We had 7 experiments in the field under rain-out shelters where we directly measured the uptake of P fertiliser (using radioisotope) under wet (decile 7-8) and dry (decile 2-3) in-season conditions... We applied P fertiliser containing a radioactive tracer that gives the fertiliser a unique 'fingerprint' so that we could track the uptake of fertiliser into the plant... We are examining the value of information that might support decision making around P management including the value of accurate soil P testing and the value of being able to estimate when soil P fertility will fall below sufficiency using modelling techniques...
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Catalogue: GRDC Updates (North)
Soil coring reveals to the farmer a fuller picture of the plant's exploration of its soil environment, a useful tool in crop management... Whilst measurement of parameters such as salt and sodicity, and knowing the physical condition of the soil, provide a guide to potential soil constraints, it is the plant that integrates all of the conditions it encounters and responds ... The shallow nutrients are regularly detected in the soil analyses of the standard (0-10cm) soil sample, but are often not available for plant uptake for long periods during the growing season...
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Catalogue: GRDC Updates (South)
Soil coring reveals to the farmer a fuller picture of the plant's exploration of its soil environment, a useful tool in crop management... Whilst measurement of parameters such as salt and sodicity, and knowing the physical condition of the soil, provide a guide to potential soil constraints, it is the plant that integrates all of the conditions it encounters and responds ... The shallow nutrients are regularly detected in the soil analyses of the standard (0-10cm) soil sample, but are often not available for plant uptake for long periods during the growing season...
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Catalogue: Broadacre Field Crops DAFF QLD
While chickpeas are considered to have moderately high requirement for P, economic fertiliser responses to P are uncommon... The two exceptions are: soils with critically low P levels (below 6-8 mg P/kg, based on a Colwell test at 0-10cm) and no prior history of P fertiliser long fallow situations with low VAM levels (10 months or longer) even where soil levels are considered adequate... Some situations where N fertiliser may warrant consideration include: late plant situations where the crop can flower as quickly as 60 days, and rapid early growth is critical in achieving adequate height and sufficient biomass to support a reasonable grain yield...
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Catalogue: Broadacre Field Crops DAFF QLD
While chickpeas are considered to have moderately high requirement for P, economic fertiliser responses to P are uncommon... The two exceptions are: soils with critically low P levels (below 6-8 mg P/kg, based on a Colwell test at 0-10cm) and no prior history of P fertiliser long fallow situations with low VAM levels (10 months or longer) even where soil levels are considered adequate... Some situations where N fertiliser may warrant consideration include: late plant situations where the crop can flower as quickly as 60 days, and rapid early growth is critical in achieving adequate height and sufficient biomass to support a reasonable grain yield...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
While chickpeas are considered to have moderately high requirement for P, economic fertiliser responses to P are uncommon... The two exceptions are: soils with critically low P levels (below 6-8 mg P/kg, based on a Colwell test at 0-10cm) and no prior history of P fertiliser long fallow situations with low VAM levels (10 months or longer) even where soil levels are considered adequate... Some situations where N fertiliser may warrant consideration include: late plant situations where the crop can flower as quickly as 60 days, and rapid early growth is critical in achieving adequate height and sufficient biomass to support a reasonable grain yield...
Related categories:
Catalogue: GRDC Updates
, a simple computer program estimates water and nitrogen accumulation during fallows and complements more direct methods such as the push probe, soil cores and soil analysis... uses farm rainfall records for the current season to estimate the effectiveness of rain for future crop... Nitrogen mineralisation from the soil organic pool during the fallow period is also estimated based on soil moisture, temperature, soil type and years of cultivation...
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