Proceedings
Authors
| Filter results22 paper(s) found. |
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1. Evaluating Relationships between Soil Respiration and Nitrogen Use Efficiency in CornAvailable nitrogen (N) often limits the agricultural production of corn (Zea mays) and the N fertilizer use efficiency is of primary concern for producers in Kansas and the Midwest. This study was carried out to understand the agronomic value of commercially available soil health tests (e.g. 24 hr CO2 burst) and their relationship to components of nitrogen use efficiency (NUE) in corn. Relationships between N response and soil CO2 evolution were investigated across multiple sites and management... D. Ruiz diaz, B. Rutter |
2. Correlation Between Mehlich-3 and Haney Extractable Phosphorus and Potassium, and Their Relationship to Soybean (Glycine Max) Yield ResponseNumerous soil tests have been developed for estimating the plant-availability of soil phosphorus (P) and potassium (K). Understanding the relationship between these test’s results and crop response to fertilizer application is essential for developing and improving fertilizer recommendations. Field trials have been initiated at six sites located across the state of Kansas to investigate the response of soybean to broadcast P and K fertilizer application. Plots are... E. Rutter, D. Ruiz diaz, F. Hansel |
3. Corn grain nitrogen and yield with foliar nitrogen application at early reproductive growth stageLate fungicide applications in corn with the use of high clearance equipment create the opportunity for additional foliar fertilizer applications. The objectives of this study were to (1) evaluate the benefit of fungicide applications on yield and grain N in combination with foliar N applications and (3) assess the value of foliar N the application using N sources with urea- formaldehyde/triazone during the VT-R1 growth stage. This experiment was conducted at 6 locations in 2016 and 2017... A. Stammer, D. Ruiz diaz |
4. Should Corn Nitrogen Fertilizer Guidelines be Adjusted for Late N Fertilizer Applications?Late application of nitrogen (N) fertilizer is a topic that is receiving considerable attention. Previous research in Kansas has shown that split applications of N fertilizer can increase yield compared to applications at planting in some site years. This study was designed to investigate how N rate recommendation guidelines can be affected by splitting N fertilizer application with applications during late vegetative growth stage. Four corn study locations were established in North Central and... A. Stemmer, D. Ruiz diaz |
5. Nitrogen Fertilizer Management for Wheat Under Dual Purpose Grazing and Grain ProductionDual purpose winter wheat is a common system used in many regions of the Southern Great Plains. The objective of this study was to i.) evaluate the interaction of wheat grazing management and soil and fertilizer nitrogen requirements with emphasis on dual purpose wheat. This study was established at three locations during the 2015-2016 growing season. Experimental design was a randomized split block design with 16 treatments including simulated grazing and grain only treatments and varying rates... T. Gardner, D. Ruiz diaz, C. Edwards |
6. Nitrogen Use Efficiency and Corn Yield as Affected by Applied Sulfur and Nitrogen FertilizerOverall corn (Zea mays L.) yield response, as well as nitrogen uptake and nitrogen use efficiency, can be affected by multiple factors, including the supply of other nutrients such as sulfur. The objective of this study was to evaluate the effect of nitrogen with added sulfur fertilizer on corn response parameters i) whole plant nitrogen uptake, ii) yield, and iii) nitrogen use efficiency when compared to nitrogen alone. Nitrogen Use Efficiencies evaluated in this study included i) Apparent... T. Husa, D. Ruiz diaz |
7. Surface soil acidification and lime application in no-till systemsSurface soil acidification can develop after multiple years under no-tillage system, a primary effect of multiple years of broadcast fertilizer application and organic matter decomposition. The objective of this work was to evaluate the effects of surface lime application on crop yield response and changes in soil pH in the soil profile. Field experiments were established at two locations in Kansas and selected base on similarities in management history (approximately 30 years under no-till),... D. Ruiz diaz, B. Rutter |
8. 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-ammonium... G. Roa , D. Ruiz diaz |
9. Evaluation of Soil Test Methods and Early Tissue Analysis to Assess Potassium Response in SoybeanMultiple soil test methods has been evaluated as diagnostic tool for potassium management in soybeans. This study compared different soil test K methods (STK) and evaluate the correlation to soybean yield and K uptake response in low testing soils, and assessed tissue analysis as alternative for in-season correction options. ... D. Charbonnier , D. Ruiz diaz |
10. Soil Mineral Nitrogen Response to Nitrogen Fertilizer Application in Corn Early Growth SeasonSoil Mineral Nitrogen (SMN) plays a crucial role for the growth and productivity of crops such as corn, this crop is very demanding of nitrogen (N) in early growth stages. Maintaining the highest amount of N in the form of ammonium (NH4+) or nitrate (NO3-) can be key to obtaining high yields. Substances such as nitrification inhibitors (NI) were created to avoid losses of N from the soil. This study was carried out in 8 site year locations across... P. Morinigo, D. Ruiz diaz |