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soil fertility

Catalogue: GRDC Media
Manures prove their worth in a fertiliser program.. Manures can be a cost effective means of supplementing traditional in-organic fertilisers to help replace nutrients such asnitrogen (N) and phosphorus (P) which are extracted from the soil during a crop's growth cycle and removed from the paddock in grain... Manures from beef cattle feedlots and poultry farms are increasingly being used to supplement traditional in-organic fertilisers in helping replace nutrients such as nitrogen (N) and phosphorus (P) which are extracted from the soil during a crop's growth cycle and removed from the paddock in grain...
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Catalogue: GRDC Updates
The aim of the study was to determine how mouldboard ploughing (soil inversion), rotary spading and banded wetting agent affect the availability of soil nutrients... Soil moisture and pH were measured on a 5 x 5 cm grid and root maps were taken by marking each root intersection with the pit face on a transparent film... Our results from the first year of the study show that the method used to manage soil water repellence had little impact on soil nutrient supply with the exception of phosphorus...
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Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: Broadacre Field Crops DAFF QLD
A crop field showing nitrogen deficiency.. The books outline the range of tools that are available to assist growers to manage nitrogen and climate risk for maximum yields and to address soil fertility decline... The amount of nitrogen added will be in proportion to the quantity of vegetative material returned to the soil which in turn is influenced by the seasonal conditions...
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Catalogue: GRDC Updates
Agronomy: the key to productive pastures that can sustain profitable grain production in Queensland.. The benefits from pastures are directly related to their productivity; poor pastures will limit beef production, and will do little to improve the soil and future crop production.. The paper provides a series of insights into the need to consider pasture phases in much of our cropping lands, the contributions these pastures can make; and the need for better agronomy to maximise these contributions and make them last...
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Catalogue: GRDC Updates
Early availability to phosphorus is crucial, phosphorus deficiency limits wheat grain yield principally by depressing early growth, leaf emergence rate and maximum rate of tiller emergence (Rodriguez et al. 1999).. Better placement of phosphorus has the potential to increase phosphorus use efficiency in cropping systems on all soil types... Table 1 notes: Mn, Cu, Zn and B are measured in g/tonne (*)...
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Catalogue: GRDC Updates
PLANT TISSUE TESTING - AN UNDER UTILISED TOOL FOR DIAGNOSING HIDDEN HUNGER IN CROPS.. Results suggest the P removal values in grain used for wheat (3.4 kg/t) and chickpea (3.7 kg/t) are about right... Repeated Starter-Z applications will increase the soil DTPA-Zn levels if the soil levels are likely to be above the suggested critical values ( H 0.8 mg/kg) growers may opt to apply P only at sowing and collect a tissue test for confirmation of not only Zn adequacy, but Cu, Fe, Mn and B also...
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Catalogue: GRDC Updates
Intensive livestock industries are rapidly expanding in southern Qld and northern NSW and the by-products can be an attractive source of nutrients for use in broadacre farming systems... While manures and other organic waste materials (eg. sugarcane mill muds, by-products from ethanol plants, municipal biosolids) can provide many benefits to soil health, fertility and crop productivity, there are also a number of issues that growers and advisors need to consider before determining the most effective combination of management strategies to use, and the economic benefits (if any) of making a change to current practices... The paper highlights some of these issues, while providing examples of recent research to look at the roles of feedlot manures in supplying N and P to crops...
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Catalogue: GRDC Final Reports
The project team identified soil nutrient test kits, ground penetrating radar, remote electrical conductivity (EC) procedures and an instrumented, calibrated tine to measure soil strength as tools that offer value to growers in southern Australia... Several rapid soil tests may be used by growers to improve their knowledge of soil conditions... The use of a calibrated, instrumented tine while cultivating with a machine fitted with a precision GPS allows growers to diagnose and map compacted and hard setting soils (strong soils without structure).This information will allow growers to develop ripping regimes, controlled traffic practices and other amelioration procedures that precisely target these soil structure hazards...
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