Subplots facilitate assessment of corn yield losses from weed competition in a long-term systems experiment
نویسندگان
چکیده
منابع مشابه
Weed Diversity Affects Soybean and Maize Yield in a Long Term Experiment in Michigan, USA
Managing production environments in ways that promote weed community diversity may enhance both crop production and the development of a more sustainable agriculture. This study analyzed data of productivity of maize (corn) and soybean in plots in the Main Cropping System Experiment (MCSE) at the W. K. Kellogg Biological Station Long-Term Ecological Research (KBS-LTER) in Michigan, USA, from 19...
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Tillage and crop rotation system effects on corn (Zea mays L.) growth and development have been studied extensively over the past 30 years, but most studies have principally focused on the effects of tillage and crop rotation on mean corn response parameters such as plant height, grain moisture content, and grain yield. As a result, many agronomists and growers have concluded that instances of ...
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M R RYAN*, D A MORTENSEN*, L BASTIAANS , J R TEASDALE , S B MIRSKY , W S CURRAN*, R SEIDEL§, D O WILSON§ & P R HEPPERLY§ *Department of Crop and Soil Science, The Pennsylvania State University, University Park, PA, USA, Crop and Weed Ecology, Wageningen University, Wageningen, the Netherlands, Sustainable Agricultural Systems Laboratory, USDA-ARS, Beltsville, MD, USA, and §King’s Agriseeds Inc....
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The statistical analysis of yield data from a long term rotation trial presents a number of challenges, as illustrated by a 10 year study on the effects of reduced chemical inputs and different cropping sequences, most of which involved corn (Zea mays L.) (King and Buchanan, 1993). Important features of the yield data from this trial include considerable unbalance, possible correlations across ...
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از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
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ژورنال
عنوان ژورنال: Agronomy for Sustainable Development
سال: 2010
ISSN: 1774-0746,1773-0155
DOI: 10.1051/agro/2009048