Proceedings
Year
| Filter results17 paper(s) found. |
|---|
1. Biomas Removal: Effect on Soil Nutrients and ProductivityInterest in renewable alternatives to fossil energy has increased. There is also a growing awareness of the impact of greenhouse gas emission on global climate change. Crop biomass can be used to make liquid fuels like ethanol. These cellulosic materials are also potential feedstock for controlled combustion substituting fo r natural gas or coal. There are a wide range of potential feedstocks, trees, perennial grasse s and crop non-grain biomass (or residues.). Particularly in the Corn Belt, cor... |
2. Crop Residue Removal Effects on Soil PropertiesThree large challenges facing mankind are the n eed to feed a rapidly growing population, increasing concentration of greenhouse gases in the atmosphere, and reliance on fossil fuels. Expectations from agriculture include produ ction of food and fiber to meet demands, management of agricultural systems to sequester carbon and redu ce emission of other greenhouse gases, and provision of feedstock for a rapidly expanding biofuels industry. Some discussions involving use of crop residue for biofue... |
3. Delayed-Release Nitrogen Fertilizer Effects on In-Season Soil Nitrogen for Michigan Sugarbeet ProductionDelayed-release N fertilizers have received attention for Michigan sugarbeet production as producers seek to improve the timing of N ava ilability to better match plant demand and to maximize plant N use efficiency. The N release ch aracteristics of these products are particularly important in sugarbeet production, where excessive N availability late in the season can have adverse impacts on crop quality. The objective of this research was to evaluate delayed-release N fertilizer sources, alone... |
4. Effect of Phosphorus and Potassium Fertilization on Corn Development and Root Distribution in Conservation TillageIn conservation tillage systems, like no-till (NT) and strip-till (ST), phosphorus (P) and potassium (K) typically become vertically and/or horizontally stratified in the soil. This stratification has the potential to make P a nd K less available and to limit corn yield. The objective of this study is to determine the infl uence of tillage and P and K placement and rate on soil P and K content, soil water status, root and shoot development, and grain yield of corn. The experiment was arranged i... |
5. Enhanced Efficiency Nitrogen Fertiizers Release in an Illinois SoilThe release rates of ammonium and nitrate from applications of enhanced efficiency nitrogen fertilizers to soil is not well understood. A better knowledge of th e soil processes involved with N release could allow for greater acceptance of these fertilizers. The objective of this study was to compare traditional quick release fertilizers w ith enhanced efficiency nitrogen fertilizers to examine their release rates. Th e fertilizers chosen were urea and a polymer-coated urea, which were applied t... |
6. Evaluation of Nutrisphere-N as aSoil Nitrification and Urease InhibitorNutrisphere-N is a fertilizer ad ditive, which is claimed to prev ent nitrogen loss from soil through the inhibition of urease and nitrif ication. The objective of this study was to evaluate the effects of Nutrisphere-N on urease, nitr ification, and ammonia volatiliza tion from soil under controlled condition. Nutrisphere-N was mixe d with urea solutions or impregnated on urea granules and before application to soil. In the three experiments conducted, adding Nutrisphere-N had little or no effe... |
7. Foliar Fertilization and Fungicide Application for SoybeanConcerns over fungal diseases in soybean have renewed interest in applying pesticides for disease control with the goal of increasing grain yi eld. Interest has especially been sparked by discussions of the possibility of Asian Soybean Rust (Phakopsora pachyrhizi) spreading north to the North Central region. Because of increasing prices of soybean grain and traditional fertilizers, many Midwest grower s are considering mixing fluid fertilizers and fungicides for foliar application to soybean. Ex... |
8. Foliar Manganese and Glyphosate Formulation Yield Effects on Glyphosate-Resistant Soybeans in OhioIn order to address the potential problems associated with glyphosate and manganese applications to glyphosa te-resistant soybeans (Glycine max [L.] Merr.), an experiment with varying glyphosate and manganese micronutrien t formulations and application timing was designed and carried out on two locations in Ohio to test effects on soybean yield. At the location in northwestern Ohio, th e yields for all of the manganese-treated plots were significantly higher ( P=0.1) than the untreated plots, re... |
9. Impact of Biofuel Crops on U.S. Agriculture: An OverviewBiofuel crops are having an impact on prices of commodities, land use, and environmental factors such as water quality, biod iversity, etc. There are critical linkages today that result in the phenomenon of oil and corn prices moving in lockstep. We also see that limited cropland leads to tradeoffs between different crops that aff ect not only food and feed production, current corn based biofuel production but also future cellulosic production. The current and potential impact of biofuels on the... |
10. Incorporating Cover Crops into No-till Production SystemsAlthough no-till soil management has many benef its, including protecting the soil from erosion, improving soil organic matter, and improving soil moisture storage, depending on environmental conditions there could be a number of potentia l problems. Implementation of no-till soil management in eastern South Da kota can lead to wet and cold soils at the time of planting. Cover crops have the potential to utilize exce ss soil moisture and improve soil conditions at planting. A field experiment wa... |
11. Nitrogen Availability of Treated and Raw Dairy ManureThere is minimal information on the nitrogen (N) availability and composition of treated manures. Knowing how N availability differs w ith manure treatment will result in better N crediting guidelines. Raw dairy manure and anaer obically digested manure were incubated with five typical Wisconsin soils for 112 d. Net N mineralized from the different N sources were compared. Nitrogen mineralizatio n differed by manure type and also by soil. Overall, the digested slurry and the digested separated l... |
12. Nitrogen Management for Soft Red Winter WheatSoft red winter wheat was grown wi th various rates of four N materials, ammonium sulfate, urea, urea-ammonium nitrate and ESN, for harvest years 2004 through 2007. In all studies 21 lbs N/a was applied at planting. Over th ese four years top wheat yields were produced with 60 or 90 lbs topdress N/a depending on year. Av eraged over the four years 90 lbs N/a resulted in 1.6, 1.0 and 2.2 bu/a more yield than 60 lbs N/a for urea, UAN and ESN. This difference was neither significant nor economical.... |
13. Nitrogen Recalibration for Wheat in North DakotaThe rise in grain prices and fertilizer costs, as well as the need for more soil-specific recommendations has spurred recent research into N response of wheat in North Dakota. Combining data from 1970 to 1990, together with recent studies has shown that new recommendations are in order. There is a rela tionship of wheat yield to available N. The relationship is better when residual soil nitrate is considered. Different areas of the state partition out with different response curves. Using the '... |
14. Organic Farming in Nebraska: Establishing Organic Research for the Organic Farming CommunityFour sites in Nebraska were developed to have land available to conduct research on certified organic land. All sites will be certified organic by the end of 2008. The goal of the project is to conduct research relevant to the organic farmi ng community and not to compare organic systems with conventional systems. Resear ch is being conducted on the use of flaming to control weeds, winter wheat variety development and selection for the organic market, variety testing of organic winter wheat, pro... |
15. Recent Perspectives for Starter Fertilizer Use on Corn in MinnesotaApplication of fertilizer with the seed at planning has been a popular choice for Minnesota corn farmers to get their crop off to a fast start. Traditionally the salt index of a fertilizer has been important in farmers' management decisions. A research study was conducted at six locations on fine and coar se textured soils around Minnesota. Three fertilizer grades, 4-10-10, 10-34-0, and 3-18-18 were compared at two rates and in three placements relative to the seed. Nitrogen (N) and phosphorus (... |
16. Starter Potassium for Corn: Why and WhenStarter fertilizer application can complement broa dcast P and K fertilization for corn and other crops. Questions about its use relate mainly to the conditions in which it is most effective (such as soil-test level, tillage syst em, and broadcast fertilization rates among others), application methods and rates that do not damage seedlings, and nutrient ratios. Many studies in Iowa and the Midwest have shown that starter mixtures (usu ally N-P or N-P-K) often increase early corn growth. Corn yie... |
17. Weed Control Timing Effects on Corn Yield Response to NitrogenNitrogen (N) rate guidelines for corn are under c ontinued scrutiny to maximize N use efficiency in order to minimize potential N losses to th e environment while maximizing economic returns to growers, especially with significant N fertilizer price increases in recent years. In-season crop stress can potentially affect corn N needs for optimum production. Recently, postemergence weed control has become more common with th e availability of glyphosate resistant corn hybrids. Delaying weed contro... |