Downsizing an Integrated Crop Management Field Study Affects Economic and Biological Results

Wei, Wei; Alldredge, J. Richard; Young, Douglas L.; Young, Frank L.

doi:10.2134/agronj2001.932412x

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Triplicate sets of plots (SW–WW–SF, WW–SF–SW, SF–SW–WW, SW–F, and F–SW crop sequences) were established in 1984 to allow all phases of the rotations to be represented each year. Wei et al (2001) point out the importance of including all phases of the rotation in experimental design. They reported that having all crop phases present each year was particularly important for interpreting biological results due to yearly climatic differences.…”

Section: Methodsmentioning

confidence: 99%

Economics of Annual Cropping versus Crop–Fallow in The Northern Great Plains as Influenced by Tillage and Nitrogen

DeVuyst

Halvorson

2004

Agronomy Journal

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Annualized yields with more intensive cropping (IC) systems tendIntensifying the crop rotation from crop-fallow to to be greater than those of spring wheat-fallow (SW-F); however, little economic comparison information is available. The long-term crop-crop-fallow or annual cropping without fallow us-(12 yr) effects of tillage system and N fertilization on the economic ing MT and NT systems in the central and northern returns from two dryland cropping systems in North Dakota were Great Plains may improve the economics of dryland evaluated. An IC rotation [spring wheat (Triticum aestivum L.)farming systems. Kaan et al. (2002) reported that a winter wheat (T. aestivum L.)-sunflower (Helianthus annuus L.)] wheat-corn (Zea mays L.)-fallow cropping system had and a SW-F rotation were studied. Tillage systems included convenhigher annual profits than wheat-fallow in Colorado tional till (CT), minimum till (MT), and no-till (NT). Nitrogen rates from 1989 to 1997. Dhuyvetter et al. (1996) hypothesized were 34, 67, and 101 kg N ha Ϫ1 for the IC system and 0, 22, and 45 that MT and NT continuous cropping systems may be kg N ha Ϫ1 for the SW-F system. Annual precipitation ranged from more profitable than traditional crop-fallow systems. 206 to 655 mm, averaging 422 mm over 12 yr. The IC system generated Zentner et al. (2002) investigated the economics of crophigher profits than the SW-F system, but the IC profits were more variable. Within the IC system, MT generated higher profits than ping and tillage systems in the western Great Plains corresponding N treatments under CT and NT, but MT profits were area of Canada. In comparing expected returns, they more variable. Of the N rates evaluated, the largest N rates generated reported mixed results when comparing reduced tillage the largest profits. The dryland IC system with MT and NT was more systems (MT and NT) with CT. They also reported profitable than the best SW-F system using CT for this location.higher expected returns to SW-F under low wheat prices. Stochastic dominance analyses revealed that the SW-F system andAt higher prices, IC rotations were found to be more IC system CT treatments were economically inefficient when comprofitable. Given the relatively short time series (5-6 yr) pared with the IC system with MT and NT. available to Zentner et al. (2002), they did not formally consider riskiness of the cropping and tillage systems. In a series of articles, Halvorson et al. objective was to make an economic comparison of a 3-yr son, USDA-ARS,

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Section: Methodsmentioning

confidence: 99%

Economics of Annual Cropping versus Crop–Fallow in The Northern Great Plains as Influenced by Tillage and Nitrogen

DeVuyst

Halvorson

2004

Agronomy Journal

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“…Evaluation of crop and pest management strategies often is done with small‐plot studies, but farmer acceptance of results from small‐plot studies can be poor. In addition, results obtained from small‐plot studies may not always be representative of farm fields (26), particularly for mobile insects. Crop rotation benefits are well documented in numerous small plot studies; however, few studies have explicitly examined the influence of cropping diversification and intensification on grain quality and yield at the field scale.…”

Section: Previous Research On Intensified and Diversified Wheat Croppingmentioning

confidence: 99%

Spring Wheat Production and Associated Pests in Conventional and Diversified Cropping Systems in North Central Montana

et al. 2013

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The primary focus of this study was to determine impacts of diversification and intensification of the spring wheat-fallow system on spring wheat production, pests, and pest interactions at the field scale. Diversified rotations included replacement of fallow with either annual pulse crops or cool-season oilseeds. Preplant soil water was less in diversified rotations, but residual nitrate was not influenced by rotation type. Insect pests and beneficial arthropods were in greater numbers in conventional rotations. Incidence and severity of crown and root rots of wheat were similar between rotation types, but foliar leaf spot diseases were greater for wheat in conventional rotations. Weed densities were not influenced by rotation type. Spring wheat yield, tiller density, and test weight were greater in conventional rotations. Spring wheat in diversified rotations had greater drought stress. Diversification and intensification of spring wheat systems may reduce pests and decrease wheat productivity, particularly when precipitation is inadequate.

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“…One of the disadvantages of long-term cropping systemsweed management studies is the large land use requirement (Wei et al 2001). The IPM study entailed 144 plots and encompassed 32 ha (Young et al 1994c).…”

Section: Fertility By Herbicide Levels Studymentioning

confidence: 99%

Symposium Long-term weed management studies in the Pacific Northwest

Young

2004

Weed Science

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The winter wheat production system of the Pacific Northwest is characterized by severe wind and water erosion and winter annual grass weeds requiring high herbicide input. Since 1985, numerous multi- and interdisciplinary, long-term, large-scale, integrated cropping systems studies have been or are currently being conducted. The primary focus of these studies was on weed biology, ecology, and management, whereas secondary evaluations were on alternative cropping systems, conservation tillage, and fertilizer or herbicide inputs. The 6-yr integrated pest management project, conducted in the high-rainfall zone (> 400 mm), showed for the first time that when weeds were adequately managed, conservation production systems were more profitable than conventional systems. In the intermediate rainfall zone (350 to 400 mm), a recently concluded 6-yr, three-state study integrated single-component research results into a multifaceted approach to managing jointed goatgrass. This project has been used as a model study for other western states and the National Jointed Goatgrass Research Initiative. At present (9 yr thus far), a study is being conducted in the low-rainfall zone (< 350 mm) to examine the feasibility of no-till spring cropping systems in lieu of the highly erosive, weed infested, wheat–fallow system. Because of these projects, the Washington Wheat Commission recognized the importance of long-term, interdisciplinary, cropping systems research and has therefore established an Endowed Chair at Washington State University for direct seed cropping systems research. Federal, national, and regional agencies have used information from these projects for farm plans and pesticide usage.

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Downsizing an Integrated Crop Management Field Study Affects Economic and Biological Results

Cited by 7 publications

References 14 publications

Economics of Annual Cropping versus Crop–Fallow in The Northern Great Plains as Influenced by Tillage and Nitrogen

Economics of Annual Cropping versus Crop–Fallow in The Northern Great Plains as Influenced by Tillage and Nitrogen

Spring Wheat Production and Associated Pests in Conventional and Diversified Cropping Systems in North Central Montana

Symposium Long-term weed management studies in the Pacific Northwest

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