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nutrient use efficiency

Catalogue: Ground Cover
Some of the researchers from the More Profit from Crop Nutrition phase II project who recently met in Perth: (from left) Margaret Roper from CSIRO, Liam Ryan and Ross Brennan from DAFWA, Professor Zed Rengel from UWA, Roger Lawes and Elliot Duncan from CSIRO, Kelly Ryan and Craig Scanlan from DAFWA, and Louise Barton from UWA... The GRDC's More Profit from Crop Nutrition phase II program (MPCN II) aims to help growers optimise returns from fertiliser and nutrition investments by improving: the nutrient-use efficiency of crops through plant breeding; the capacity of soils to free-up and supply nutrients; the match between N, P, K, S and micronutrient applications and crop needs; and fertiliser and adjuvant product formulation and design... Researchers from the Department of Agriculture and Food, Western Australia (DAFWA), the University of Western Australia (UWA), Murdoch University and CSIRO are collaborating on 26 key national projects through MPCN II...
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Catalogue: GRDC Research Summaries
Fertilisers have traditionally represented a significant part of the variable costs of growing crops in Australia... The expected outcome of this project is best nutrient management strategies evaluated in the context of a risk-return framework... Assuming farmers are profit -maximizers and risk-neutral, this analysis shows that they are likely missing out on the better seasons by under-fertilizing in sandy dunes and mid slopes of several sites across the Mallee...
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Catalogue: GRDC Research Summaries
Fertilisers have traditionally represented a significant part of the variable costs of growing crops in Australia... Whether fertiliser input can be sustained is under question because the profitability of fertiliser use by grain growers is undergoing considerable change... Although the cost of fertiliser has receded from peak prices, the recovery of the world economy is expected to place upward pressure on energy prices in the future...
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Catalogue: GRDC Research Summaries
Recent work has shown nitrate adsorption to anion exchange sites slows nitrate leaching in soils with pH dependent positive charge... To achieve the objective, soil from long-term field trials will be analysed for carbon (C), nitrogen (N) and phosphorus (P) in measureable fractions and information obtained will be used to test model predictions using crop N & P uptake plus yield collected in long-term trials... The project output will include a revised soil module in the crop systems model, APSIM, based on measureable fractions of organic matter and knowledge of ratios of carbon (C), nitrogen (N) and phosphorus (P) in these fractions...
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Catalogue: GRDC Research Summaries
Recent work has shown nitrate adsorption to anion exchange sites slows nitrate leaching in soils with pH dependent positive charge... To achieve the objective, soil from long-term field trials will be analysed for carbon (C), nitrogen (N) and phosphorus (P) in measureable fractions and information obtained will be used to test model predictions using crop N & P uptake plus yield collected in long-term trials... The project output will include a revised soil module in the crop systems model, APSIM, based on measureable fractions of organic matter and knowledge of ratios of carbon (C), nitrogen (N) and phosphorus (P) in these fractions...
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