Download or read book The Impacts of Continuous Corn and a Corn corn soybean wheat Rotation Grown Under Various Management Schemes on Nitrate Leaching Soil Physical Characteristics and Net Returns written by Jeffrey Smeenk and published by . This book was released on 2003 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecosystem Services from Agriculture Across a Management Intensity Gradient in Southwest Michigan written by Sara Parr Syswerda and published by . This book was released on 2009 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rotational and Residual Nitrogen Effects on Soybean and Corn written by Kevin G. Silveira and published by . This book was released on 1993 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Crop Rotation and Nitrogen Fertilization on Soil Nitrate Concentration and Corn Yield written by Enrique Ortiz-Torres and published by . This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing concerns about production cost and environmental impacts of N fertilization require improving N management. The objectives of this study were to evaluate effects of cropping sequences and N fertilization on (1) corn yield and yield stability and (2) soil nitrate concentration in two Iowa long-term rotation experiments and (3) to assess the performance of the late spring nitrate test (LSNT) to assess N availability for corn in several cropping sequences. The experiments were near Kanawha (20 yrs) and Nashua (26 yrs) and N fertilization rates for corn were 0, 90, 180, 270 kg N ha−1. Rotations in Kanawha were continuous corn with spring N (Csp), continuous corn with fall N (Cfl), corn-corn-corn-oat, corn-soybean, corn-soybean-corn-oat, corn- corn-oat-alfalfa, and corn-oat-alfalfa-alfalfa. Rotations in Nashua were continuous corn, corn-soybean, corn-corn-soybean, corn-corn-corn-soybean, and corn-corn-oat-alfalfa. The results indicated that corn yield was higher and yield response to N was lower in the order corn after alfalfa > after soybean or oat undersown with alfalfa, and after alfalfa. There were no significant differences between response to N of continuous corn and second- or third-year corn after soybean. On average, N rates producing maximum observed net returns ranged from 270 kg N ha−1 for corn after corn to zero N for corn after alfalfa. On average, Csp yielded 8.7 % more than Cfl and the highest N rate used did not produce yield as high as those observed for corn in rotation. Corn yield across time was higher and more stable with N fertilization and when legumes were included in rotation. Observed maximum net returns to N increased over the time but the relative response to N fertilization did not change consistently. The highest soil nitrate concentrations were observed for corn after alfalfa and corn with N fertilization. Soil nitrate concentrations were higher for Csp than Cfl. Fertilization increased soil nitrate linearly for all corn crops and rates of increase were similar, except for smaller increases for Cfl and Csp. A certain nitrate concentration resulted in higher relative corn yield for corn after alfalfa. The results support guidelines for use of the LSNT test in Iowa.

Download or read book The Effect of Corn and Soybean Cropping Sequence on Soil Moisture and Plant Nutrients written by Philip Jon Copeland and published by . This book was released on 1990 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Tillage Rotation Nitrogen and Variety on the Growth and Grain Yield of Corn and Soybean written by Brian George Meese and published by . This book was released on 1989 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery and Residuality of Applied N in a Corn soft Red Winter Wheat double crop Soybean Rotation Grown on a Well Drained Soil written by Demetrio Periferachis Zourarakis and published by . This book was released on 1992 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Soil and Water Conservation written by and published by . This book was released on 1995 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Management written by Jerry L. Hatfield and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Degradation of soils continues at a pace that will eventually create a local, regional, or even global crisis when diminished soil resources collide with increasing climate variation. It's not too late to restore our soils to a more productive state by rediscovering the value of soil management, building on our well-established and ever-expanding scientific understanding of soils. Soil management concepts have been in place since the cultivation of crops, but we need to rediscover the principles that are linked together in effective soil management. This book is unique because of its treatment of soil management based on principles—the physical, chemical, and biological processes and how together they form the foundation for soil management processes that range from tillage to nutrient management. Whether new to soil science or needing a concise reference, readers will benefit from this book's ability to integrate the science of soils with management issues and long-term conservation efforts.

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1992 with total page 1742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Continuous Living Cover Adaptive Strategies for Putting Regenerative Agriculture into Practice written by Jacob Jungers and published by Frontiers Media SA. This book was released on 2023-12-18 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sustainability of U S Soybean Production written by Council for Agricultural Science and Technology and published by . This book was released on 2009 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Cover Crops on Nutrient Dynamics and Soil Properties in Corn soybean Rotation in Southern Illinois written by Gurbir Singh and published by . This book was released on 2018 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corn (Zea mays L.) and soybean ( Glycine max L.) production in the Midwest US can result in significant nutrient leaching to groundwater and surface waters, which contributes to eutrophication and hypoxia in the Gulf of Mexico. A promising strategy to control nutrient leaching and sediment runoff loss during winter fallow period is the use of cover crops (CCs). In southern Illinois, CCs are not widely adopted by farmers due to economic constraints and the lack of scientific data that supports benefits of incorporating CCs into the corn-soybean rotation. This doctoral dissertation addresses the critical question of the feasibility of the use of CCs in southern Illinois and is divided into three overarching research studies with different objectives divided into six research chapters. Research study 1 was a field experiment conducted from 2013 to 2017 to examine the effect of CCs (CC vs noCC) under two tillage systems [(no-tillage (NT) and conventional tillage (CT)] on aboveground plant attributes [dry matter yield, C:N ratio and nitrogen uptake (N uptake)], crop yields, available soil N content and N leaching in the vadose zone. The experimental layout was a randomized design with three rotations including corn-noCC-soybean-noCC [CncSnc], corn-cereal rye (Secale cereale L.) -soybean-hairy vetch (Vicia villosa R.) [CcrShv], and corn-cereal rye-soybean-oats+radish (Avena sativa L. + Raphanus sativus L.) [CcrSor] and two tillage systems. Soil samples collected after corn or soybean harvest and CC termination were analyzed for standard soil fertility parameters. Pan lysimeters installed below the 'A' horizon with depth varying from 22 to 30 cm were used for measuring soil solution nutrient concentration on weekly or biweekly basis depending on the precipitation. In NT system, the corn yield was 14% greater with CcrShv compared to CncSnc, whereas no significant difference existed in corn yield due to CC treatments within CT. Both CC treatments under NT reduced soybean yield by 24 to 27% compared to noCC. The rotations CcrShv and CcrSor with hairy vetch and oats+radish as preceding CCs resulted in 89% (37.73 vs 19.96 kg ha-1) and 68% (33.46 vs 19.96 kg ha-1) more nitrate-N (NO 3-N) leaching than the CncSnc during cash crop season 2015. During the CC season in spring 2016, cereal rye CC in CcrShv and CcrSor reduced the NO 3-N leaching by 84% (0.68 kg ha-1) and 78% (0.63 kg ha-1) compared to the CncSnc, respectively, under the CT system. Overall, our results indicated that the CT system had greater N leaching losses compared to NT system due to higher N availability in the tilled soil profile. The goal of the second research study was to understand the mechanisms of N cycling by CCs. We applied 15N labeled urea fertilizer (9.2% atom) to corn that followed hairy vetch and noCC in May 2017 to evaluate the contribution of fertilizer and soil organic matter to N leaching and quantify the 15N content of surface runoff after storm events. During the 2017 corn season, repeated soil samples were collected and analyzed for 15N fertilizer recovery in soil at three depths. 15N recovery was higher in the corn that had hairy vetch as the preceding CC than the corn that had noCC by 13.13 and 3.68 kg ha-1 on soil sampling events of 7 and 21 days after planting of corn, respectively, at the depth 15-30 cm. Overall, the cumulative loss of 15NO 3-N during corn season 2017 was

Download or read book Annual Meetings Abstracts written by American Society of Agronomy and published by . This book was released on 2000 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: