Download or read book Nitrogen Fertilizers for Corn written by Lloyd Dumenil and published by . This book was released on 1952 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Lack of nitrogen limits corn production on most Iowa soils. Many Iowa farmers can use nitrogen fertilizer profitably, our experiments show. As the supply increases, much more nitrogen fertilizer will be used -- on a larger number of acres and at higher rates per acre. Many of you have used nitrogen fertilizer on corn. But many more of you will be using nitrogen in the future. The Iowa Agricultural Experiment Station has conducted over 200 experiments with nitrogen fertilizer on cornfields over the state since 1943. It is the purpose of this bulletin to give you the information gathered from these experiments along with pointers to help you use nitrogen profitably on your cornfields." p. [837]

Download or read book Effect of Slow Release Nitrogen Fertilizers on Corn Production in Iowa written by Marianela González and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Slow and controlled release fertilizers have often been used to prevent N loss through leaching. Recently, new slow release fertilizers have been developed and their potential use in corn production is an alternative to increase N efficiency. An incubation study was performed to measure and compare the release rates from two urea-formaldehyde (UF) liquid resins and conventional urea. Four different representative soils from corn production areas of Iowa were collected. The soils were classified as: Harps (Typic Calciaquoll), Nicollet (Aquic Hapludoll), Okoboji (Cumulic Hapluquoll) and Sac (Oxyaquic Hapludoll). Soil samples (10 g) were amended with solutions containing rates of N equivalent to 0, 50, 100, 150 and 200 kg N ha−1 of urea and the UF materials and incubated at 20 0C for 0, 7, 15, 30, 45 and 60 days. At the end of the respective incubation periods each sample was analyzed for nitrate-N (NO3-N) and ammonium-N (NH4-N). The results obtain showed that UF fertilizers might not meet the N requirements for corn production in Iowa due to the low percentage N recoveries (60 - 80% N) observed. The soils had different release rates mainly affected by pH and organic matter content. A two year trial was conducted to asses the effect of a polymer-coated urea (ESN) fertilizer upon corn biomass and grain N uptake and yield when applied in the fall or spring. Nitrogen fertilizer rates used for urea and ESN treatments were 0, 34, 67, 101, 135, 168 and 200 kg N/ha. The results obtained showed that corn biomass was not affected by the use of ESN or urea in particular. Biomass weight and N uptake tended to respond to N rates in some treatments. Grain yield always increased with N rate. However the effect of ESN and urea application varied from one year to the next and among locations.

Download or read book A Method of Economic Analysis Applied to Nitrogen Fertilizer Rate Experiments on Irrigated Corn written by James Leo Paschal and published by . This book was released on 1956 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Nitrogen Fertilizer on Corn Yield written by M. L. Vitosh and published by . This book was released on 1979 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fertilizer Suggestions for Corn written by Robert G. Hoeft and published by . This book was released on 1976 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Nitrogen Fertilization of Corn with Supplemental Irrigation written by Oliver Henry Brensing and published by . This book was released on 1960 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Value of Fertilizer for Corn written by Russell Coleman and published by . This book was released on 1944 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Enhanced Efficiency Nitrogen Fertilizers on Corn Production Systems in the Mid South written by Shanice M. Jones and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fertilization of Corn and Oats with Solid Liquid and Gaseous Fertilizer Forms Applied to Sands and Medium Textured Soils in the Field written by Leo Everett Orth and published by . This book was released on 1951 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economics of Nitrogen Fertilizer For Corn written by Iowa State University. Cooperative Extension Service and published by . This book was released on 1977 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Effect of Five Nitrogen and of Liquid and Solid Mixed Fertilizer on Yield and Composition of Corn written by Robert Charles Anderson and published by . This book was released on 1959 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corn for Grain written by L. I. Painter and published by . This book was released on 1968 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fertilization of Corn and Small Grain in Relation to Growing Conditions written by Lawrence Frederick Marriott and published by . This book was released on 1953 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Economics of Nitrogen Fertilizer for Corn written by R. D. Voss and published by . This book was released on 1975 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Fertilizer Recommendations for Corn in Iowa written by A. M. Blackmer and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Predicting N Fertilizer Needs for Corn in Humid Regions written by and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: