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The Value of Green Manuring in the Integrated Management of Herbicide-Resistant Annual Ryegrass (Lolium rigidum) AgEcon
Monjardino, Marta; Pannell, David J.; Powles, Stephen B..
Herbicide resistance has become a major problem in Australian dryland agriculture. This situation has resulted from the repeated use of herbicides in place of the traditional weed control provided by cultivation and grazing. Farmers have addressed the problem of herbicide resistance by adopting a system of integrated weed management that allows weed control with a range of different techniques and herbicides. One of the non-chemical methods being considered by farmers is “green manuring”, which involves ploughing a healthy growing crop or pasture into the soil in order to prevent weed seed production and provide other benefits. In this study, the trade-offs between the effective weed control and biological benefits provided by green manuring and the large...
Tipo: Presentation Palavras-chave: Crop Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/123707
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The potential contribution of forage shrubs to economic returns and environmental management in Australian dryland agricultural systems AgEcon
Monjardino, Marta; Revell, Dean; Pannell, David J..
In face of climate change and other environmental challenges, inclusion of perennial forage shrubs in Australian agricultural systems has the potential to deliver multiple benefits: increased whole-farm profitability and improved natural resource management. The profitability of shrubs was investigated using MIDAS (Model of an Integrated Dryland Agricultural System), a bio-economic model of a mixed crop/livestock farming system. We found that including forage shrubs could increase farm profitability by over 20% for an optimal 10% of farm area in shrubs. The impact of shrubs on whole-farm profit accrues primarily through the provision of a predictable supply of “out-of-season” feed, thereby reducing supplementary feed costs, and through the deferment of...
Tipo: Conference Paper or Presentation Palavras-chave: Whole-farm modelling; Economics; Perennial species; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Livestock Production/Industries.
Ano: 2009 URL: http://purl.umn.edu/51537
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Revisiting N fertilisation rates in low-rainfall grain cropping regions of Australia: A risk analysis AgEcon
Monjardino, Marta; McBeath, T.; Brennan, Lisa E.; Llewellyn, Rick S..
Mallee farmers minimize downside risk in dry seasons by applying low rates of nitrogen (N) fertiliser to their cereal crops. The opportunity to respond to and capitalize on the better years is further limited as most inputs are applied upfront at sowing. We used an economic-risk decision model to identify a range of tactical N fertilisation options that increase net returns, while minimising risk for farmers with different risk attitudes. Importantly, we concluded that when accounting for long-term risks affecting farmers, the use of higher N rates can play a risk-reducing role in a highly variable environment like the Mallee.
Tipo: Presentation Palavras-chave: Nitrogen; Risk; Variance; Crop simulation; Economic net returns; Decision analysis; Zone management; Monte Carlo; Mallee; Crop Production/Industries; Risk and Uncertainty.
Ano: 2012 URL: http://purl.umn.edu/124339
Registros recuperados: 3
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