Proceedings
Year
| Filter results35 paper(s) found. |
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1. A New Frontier Below the Horizon: My Work with Pivot Bio BiologicalsSymbiotic Nitrogen (N) fixation is an amazing process that harnesses the power of two organisms (a legume and rhizobium) to mutually benefit one another. However, the process of biological N fixation or the reduction from dinitrogen gas to ammonia/ammonium via the nitrogenase enzyme is an expensive one. The relationship between host plant and rhizobium hinges on the free exchange of N for carbon and other metabolites. Nitrogen fertilizer is often the most limiting nutrient for cereal crop pro... T. Roberts |
2. Banded Fertility: Music for Higher Corn YieldsThere is a need in production agriculture to reduce nutrient loss to the environment and implement more sustainable production practices, but grower adoption has been slow and inconsistent due to fear of reduced yields and profit. However, if new fertilizer technologies can be used to increase nutrient use efficiency and grain yield simultaneously, grower willingness to adapt environmentally sustainable practices is far more likely. We implemented a two-year corn (Zea mays L.) yield ... S. Foxhoven, F. Below |
3. Biomass and Nitrogen Partitioning of the Modern Russet Varieties of Potatoes Under Nitrogen Stressed and Optimum ConditionsWisconsin is the third largest producers of potatoes in the USA. Nitrogen (N) is the most limiting nutrient in the development of crop biomass and yield. N uptake and partitioning in potato can be different based on the varieties and nutrient availability. These differences can result in the wide variations in yield accumulation and nitrogen use efficiencies. However, there is a lack of quantitative understanding of the in-season N uptake and demand and biomass partitioning of the different v... A. Rawal, M.D. Ruark, R.A. Lankau, J. Ross |
4. Can ProveN Reduce Corn Nitrogen Requirement in Minnesota?ProveN is a microbial product applied in-furrow with the goal of reducing the total amount of nitrogen fertilizer needed for corn (Zea mays L.). Six field trials were established over three growing seasons in Minnesota to evaluate corn response to nitrogen with and without ProveN applied at planting on the seed. Nitrogen was applied as urea prior to planting at five locations and split applied with 1/3 of the total rates of nitrogen applied at -planting, at V4, and V8 growth stages. ... D. Kaiser, J. Vetsch, M. Currie |
5. Can Soil Health Metrics Improve Standard Soil Fertility Recommendations?It is commonly speculated that integrating soil health (SH) testing with soil fertility (SF) testing would improve fertilizer recommendation decisions. However, quantified impacts of SH properties, specifically soil biological properties, on fertilizer demand have not been well established. The objective of this research was to explore corn (Zea mays L.) yield response to phosphorus (P) and potassium (K) fertilization as influenced by established SF analysis and common SH me... C.J. Ransom, J. Svedin, N.R. Kitchen, K. Veum, S.H. Anderson |
6. Chloride from Fertilizer and Water Pollution -Should I Be Concerned?Chloride is a more recently recognized pollutant of concern in many states. In Minnesota, 50 lakes and stream reaches are impaired for chloride, 30% of shallow monitoring wells exceed the secondary health standard, and chloride is on the rise in many other waters. Chloride is toxic to aquatic life, can contaminate groundwater, and has additional environmental impacts. How much does fertilizer contribute? This presentation will cover chloride sources... C. Dindorf |
7. Comparative Effects of Herbicide, Nitrogen Inhibitors and Nitrogen Source on Nitrification and Corn YieldNitrogen management in crops can be challenging due to nitrogen transformations and losses in soil, such as nitrification and denitrification. Nitrification is the conversion of ammonium (NH4+) to nitrate (NO3-) by ammonia oxidizing bacteria (AOB), Nitrosomonas and Nitrobacter. Nitrates can be lost through leaching during heavy precipitation. Nitrification inhibitor products are used to temporarily slow the nitrification process by... W. Neels, A. Jhala, B. Maharjan, R. Little, J. Iqbal |
8. Comparison of Mehlich-3 and Haney H3A-4 Soil Tests in Kansas SoilsRecommended application rates of soil fertility amendments are often based on a soil test in agricultural production systems. Interpretation of these soil tests requires correlation and calibration to crop yield response, nutrient uptake, or existing soil tests. The Mehlich-3 soil test procedure is currently used to evaluate the plant availability of phosphorus (P) and potassium (K) in Kansas soils. However, the Haney soil test has gained attention in recentyear and has been used to adjust so... B. Rutter, D. Ruiz diaz |
9. Corn Nitrogen Fertilizer Management Practices in Eastern South DakotaThe adoption factors of N best management practices (BMPs) that can lessen N loss needs to be understood to help increase adoption rates. Understanding the local, small-scale factors (geographic location, tillage type, and farm size) that influence the use of N BMPs will help nutrient management professionals provide the research and information needed to increase the use of N BMPs. South Dakota (SD) survey data from 465 producers was used to examine the above local, small-scale factors that ... J.D. Clark, A. Bly, P. Kovacs, J. Ulrich-schad |
10. Corn Response to Phosphorus Fertilization and Evaluation of Soil Test Methods in Kansas SoilsPhosphorus is a critical nutrient in corn (Zea mays L.) production, and limitation in P availability can result in significant yield reduction. The objective of this study was to evaluate corn response to phosphorus fertilization and evaluate multiple soil test methods in Kansas soils. The study was conducted in 13 locations across Kansas during 2021. Fertilizer treatment consisted of five rates of phosphorus (P) fertilizer (0, 30, 60, 90, and 120 lbs. P2O5 acre–1), using mono-... G. Roa , D. Ruiz diaz |