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1987, WEED CONTROL ECONOMICS
If you are interested in this book - all the chapters are uploaded to this site
2005 •
Ecological Economics
Bioeconomic modeling for control of weeds in natural environments2008 •
When a weed invasion is first discovered a decision has to be made on whether to attempt to eradicate it, contain it or do nothing. Ideally, these decisions should be based on a complete benefit-cost analysis, but this is often not possible. A partial analysis, combining knowledge of the rate of spread, seedbank longevity, costs of control and techniques of economic analysis, can assist in making a good decision. This paper presents a decision model to determine when immediate eradication of a weed should be attempted, or more generally whether weed control should be attempted at all. The technique is based on identifying two ‘switching points’: the invasion size at which it is no longer optimal to attempt eradication but where containment may be an option; and the invasion size at which it becomes optimal to apply no form of control at all. The model is applied to a woody perennial weed in a natural environment. The results show that seedbank longevity is the main constraint on the maximum eradicable area and spread rate is the main constraint on the maximum containment area. Stochastic simulations are undertaken to derive probability distributions of costs which are than used to evaluate the effect of budget constraints on areas that can be eradicated. We find that, in the absence of a budget constraint, it may be desirable to eradicate invasions from areas as large as 8000 ha, but when budget constraints typical of those faced by agencies in Australia are introduced, feasible eradicable areas are less than 1000 ha.
Organic Agriculture
An economic comparison of weed management systems used in small-scale organic vegetable production2018 •
Weed management strategies likely provide trade-offs in economic implications. Farmers may prioritize weed control during the “critical period” of the crop and ignore subsequent weeds; they may focus on the long term by eliminating additions to the weed seedbank with a “zero seed rain” approach; or they may suppress weed emergence with polyethylene (PE) or hay mulch. We aimed to compare the economic trade-offs of these approaches by implementing each system in a test crop of yellow onion (Allium cepa L.). We found that the zero seed rain system required the most weeding labor and the most evenly spread workload, while the hay mulch system required the most concentrated workload, due to the task of mulching. Despite the labor costs of the zero seed rain and hay mulch systems, net farm income (NFI) was most sensitive to onion yield and these systems resulted in the greatest NFI. The hay mulch system represented the least economic risk, followed by the zero seed rain, PE mulch, and critical period systems, respectively. In a subsequent crop of sweet corn, NFI was decreased 2524 USD ha⁻¹ in plots where the critical period system had been implemented the previous year, likely due to increased weed competition. Overall, despite the long-term focus of the zero seed rain and hay mulch systems related to the weed seedbank and soil quality, respectively, these systems were most profitable in this short-term study.
2010 •
2002 •
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2021 •
La dimension cognitiva en la enseñanza de lenguas
La dimension cognitiva en la enseñanza de lenguas2011 •
Editura Dacia, Cluj-Napoca, 1994
Nicolai Berdiaev, Originile și sensul comunismului rus [1994]Fractal : Revista de Psicologia
Saúde mental e gênero: facetas gendradas do sofrimento psíquico2015 •
Cuadernos del Centro de Estudios de Diseño y Comunicación
LudumProba: una propuesta para el rediseño lúdico de las instancias de examen en el contexto universitariorev. Acolada nr. 12
Isabela Vasiliu-Scraba, Un nou experiment epic: Nuvela „Într-o cazarmă” de M. Eliade, sau Ruinarea limbajului (II)2023 •
2013 •
Animal - science proceedings
Effects of lengthening the laying period of laying hens on egg qualityScience Journal of Analytical Chemistry
Determination of Vitamin C Content and Mineral Elements in Fruits Samples in Karu Metropolis, North Central Nigeria2020 •
Cuadernos de Neuropsicologia
Análisis de procesos mnérsicos en mujeres con diagnóstico de Síndrome de Turner; Implicancias teóricas y clinicas2015 •
2009 •
2008 •
Routledge eBooks
Introduction to the Postsocialist Europe section2022 •