977 research outputs found

    Use of Water Balance Models to Examine the role of Climate in Annual Legume Decline in Southern Australia

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    fhe content of annual medic and subclover (Trifo/ium subterraneum) in rasture Leys has been declining in southern Australia over the last decade. The models GROWEST and ASW were used to simulate available soil water, dry matter yield and seed production of a temperate annual pasture legume using actual climatic data for Forbes in 1987-89. GROWEST was also used to predict DM and seed production and the site and composition of the seed bank for the period 1957-89 for the subclover cultivars Dalkeith and Woogenellup. The period 1979-82 consisted of below average seasons with DM yields restricted to below 3000 kg/ha/year. It was largely after this period of drought that clover decline was first observed to be. a problem in eastern Australia in areas reliant on soft-seeded cultivars such as Woogene!lup. GROWEST and the ASW model are a start in developing useful predictive tools so that optimum hard seed levels, maturity and a range of other parameters can be predicted for different environments

    Large Area Crop Inventory Experiment (LACIE). User requirements

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    There are no author-identified significant results in this report
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