Download or read book Effect of Residue Density Urease Inhibitors and Nitrogen Fertilizers and Placements on No till Corn Responses and Selected Soil Physical Properties written by Stephen W. Hnetkovsky and published by . This book was released on 1992 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1973 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Nitrogen Fertilizers and Urease Inhibitors on No till Corn written by Anton K. Leis and published by . This book was released on 1989 with total page 156 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 1842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Urease Inhibitors Added with Nitrogen Fertilizer in No Till Corn Production written by Noora Jan and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Tillage Nitrogen Source and Nitrogen Rate on Corn Response and Selective Soil Properties in a Corn soybean Rotation written by David Kwaw-Mensah and published by . This book was released on 2005 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corn producers in Iowa adopt no-tillage (NT), strip-tillage (ST) or chisel plow (CP) and either commercial fertilizer or liquid swine manure produce corn. The rising cost of commercial N fertilizers raises concerns about using alternative and viable sources of N and P for corn production. The objectives of this study were to evaluate 1) the responses of corn to three tillage treatments (NT, ST and CP) and four N rates (0, 84, 168 and 252 kg N ha−1) of liquid either liquid swine manure or commercial fertilizer N and 2) the effects of tillage on soil temperature, compaction, moisture storage and water extraction by corn root system. The study was conducted at the Northeast Research and Demonstration Farm of Iowa State University near Nashua. The soil at the study site is Kenyon (fine loamy, mixed mesic Typic Hapludolls) soil. The experimental design was a randomized complete block with split-plot arrangement in three replications. The tillage treatments were randomly assigned to each replication as main plots and the N rates of either N source as the subplot. Results of the study showed no significant impact of tillage treatments on plant biomass and corn yield. Increasing soil N application increased corn yield and corn stalk NO3-N concentrations for both N sources. At N rates higher than 100 kg N ha−1, corn showed a luxury consumption of N for both N sources. Soil temperature in the ST treatment compared favorably with CP, but showed an overall advantage over NT, which consistently recorded lower soil temperatures and ERI. Soil moisture storage for all tillage treatments at the top 30 cm and 0 to 120 cm were not significantly different for both N sources. Soil water extraction by corn roots did not show significant differences for all tillage treatments and both N sources. Soil penetration resistance measurements for tillage treatments did not show significant differences but increased with soil depth especially in the top 20-cm soil depth and late in the growing season for both N sources.

Download or read book The Effect of Nitrogen Fertilizer Form and Placement with Inhibitor Inclusion on No till Corn Yields and Plant Nutrient Composition written by John M. Jemison and published by . This book was released on 1986 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placement Effects of Nitrogen Fertilizer for No till Corn written by Mark John Glady and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Placement of fertilizer nitrogen (N) is a critical issue during the production of corn in no-till systems, but the effects of placement vary with many site-specific factors. On-farm trials offer a new method for evaluating the effectiveness of alternative placements. The objective of this study was to explore the potential of using yield monitors in on-farm trials to compare the effectiveness of dribbled and injected N fertilizer solutions for production of corn in no-till systems. Strip-plot trials were conducted in 16-ha to 24-ha fields to compare dribbled and injected urea-ammonium-nitrate (UAN) solutions applied after crops had emerged in 2002 and 2003. The fertilizer was applied at three rates and two times to help evaluate the effects of placement, and end of season cornstalk nitrate concentrations were measured to help interpret yield response data. The solutions were applied at 56, 112, and 168 kg N ha−1 in six-row strips that were harvested as single swaths with a yield monitoring combine. Placement had statistically significant effects on yields at only one of the six site years studied. No placement effects were observed on cornstalk nitrate concentrations at any of the site years. The effect at this site was probably caused by an unusual lack of rainfall that delayed movement of the dribbled N into the soil. Based on means over the six site years, the benefits of injecting fertilizer were small in comparison to the added time and equipment costs associated with an injected treatment. On-farm trials using treated strips and yield monitors offer an effective way for corn producers within a region to evaluate alternative methods of applying fertilizer under conditions relevant to them.

Download or read book Residual Effects of Fall and Spring applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States written by Robert W. Pearson and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fertilizer broadcast in November or December on widely different soils at seven locations in Alabama, Georgia, and Mississippi during 1955-59 was only 49 percent as effective as nitrogen fertilizer applied the following spring when measured by corn yields. In terms of nitrogen recovered, the relative effectiveness was 62 percent. There were no consistent differences among the five nitrogen sources applied in the fall as measured by corn yields, but nitrogen recovery tended to be lower from urea than from the other sources. Considerable residual effects of spring-applied nitrogen were found over a period of 16 months based on both yield and nitrogen uptake by the crops. Average uptakes of 25 and 34 pounds per acre of additional nitrogen were made by the second and third crops, respectively, from the 200-pound original application. This residual nitrogen produced average yield increases of 1,600 pounds of dry forage and 19 bushels of corn per acre. These results emphasize the economic importance of residual nitrogen and the need for soil test procedures for its estimation.

Download or read book The Influence of Crop Residue and Tillage System on Soil Properties Corn Silage Yield and Yield Response to Nitrogen Fertilizer written by Kenneth D. Ayars and published by . This book was released on 1985 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Health and Intensification of Agroecosystems written by Mahdi M. Al-Kaisi and published by Academic Press. This book was released on 2017-03-15 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Health and Intensification of Agroecosystems examines the climate, environmental, and human effects on agroecosystems and how the existing paradigms must be revised in order to establish sustainable production. The increased demand for food and fuel exerts tremendous stress on all aspects of natural resources and the environment to satisfy an ever increasing world population, which includes the use of agriculture products for energy and other uses in addition to human and animal food. The book presents options for ecological systems that mimic the natural diversity of the ecosystem and can have significant effect as the world faces a rapidly changing and volatile climate. The book explores the introduction of sustainable agroecosystems that promote biodiversity, sustain soil health, and enhance food production as ways to help mitigate some of these adverse effects. New agroecosystems will help define a resilient system that can potentially absorb some of the extreme shifts in climate. Changing the existing cropping system paradigm to utilize natural system attributes by promoting biodiversity within production agricultural systems, such as the integration of polycultures, will also enhance ecological resiliency and will likely increase carbon sequestration. - Focuses on the intensification and integration of agroecosystem and soil resiliency by presenting suggested modifications of the current cropping system paradigm - Examines climate, environment, and human effects on agroecosystems - Explores in depth the wide range of intercalated soil and plant interactions as they influence soil sustainability and, in particular, soil quality - Presents options for ecological systems that mimic the natural diversity of the ecosystem and can have significant effect as the world faces a rapidly changing and volatile climate

Download or read book The Effects of Tillage Residue Placement Nitrogen Rate and Application Method on Production Soil N and Fertilizer N Uptake of Irrigated Corn written by Edward G. Gatliff and published by . This book was released on 1985 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Nitrogen Fertilizer Sources and Placement Methods on the Yield and Leaf Nutrient Concentrations of No till Corn written by Mark W. Osborn and published by . This book was released on 1987 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tillage Effects on the Fate of Nitrogen Applied to Corn as Animal Manure and Fertilizer written by Jaya Raj Joshi and published by . This book was released on 1992 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fertilizer Management for Corn Planted in Ridge till Or No till Systems written by George William Rehm and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fertilizer Placement Tillage System and Hybrid Effects on Corn Response to Potassium After Long term No till written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Tillage and Nitrogen Fertilization on Nitrogen Losses from Soils Used for Corn Production written by and published by . This book was released on 1990 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: