Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
Corn Grain Weight: Dependence Upon Nitrogen Supply And Source-Sink Relations, J. A. Fernandez, I. A. Ciampitti
Corn Grain Weight: Dependence Upon Nitrogen Supply And Source-Sink Relations, J. A. Fernandez, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
From a yield component perspective, final grain yield in corn (Zea maysL.) is the result of the number of grains per unit area and their final grain weight. The understanding of grain weight parameters, the rate and duration of grain growth, is critical to improve our rational design of management practices and breeding strategies. In this study, we attempted to determine the effect on grain weight and grain-filling parameters of source-sink modifications (i.e. the amount of assimilates available per grain) during linear grain fill under contrasting levels of nitrogen (N) fertilization in two commercially available US corn hybrids. …
Nitrogen Fertilizer Timing And Phosphorus And Potassium Fertilization Rates For Established Endophyte-Free Tall Fescue: Year 3, D. W. Sweeney, J. K. Farney, J. L. Moyer, D. A. Ruiz Diaz
Nitrogen Fertilizer Timing And Phosphorus And Potassium Fertilization Rates For Established Endophyte-Free Tall Fescue: Year 3, D. W. Sweeney, J. K. Farney, J. L. Moyer, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
Tall fescue production was measured during the third production year of a study with locations started in fall of 2016 and fall of 2017. Phosphorus (P) fertilization rate affected spring harvest yield at Site 1, but not at Site 2. Applying nitrogen (N) in late fall or late winter resulted in greater spring yields than applying N in spring or not applying N. However, fall harvest yields at Site 1 were greater with spring N application, but not at Site 2. The third-year tall fescue total yield rank as affected by N fertilizer timing was late winter>late fall=spring>no …
Corn Yield Response To Sulfur Applied With Nitrogen Fertilizer, T. E. Husa, D. A. Ruiz Diaz
Corn Yield Response To Sulfur Applied With Nitrogen Fertilizer, T. E. Husa, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to evaluate the effect of nitrogen (N) with added sulfur (S) fertilizer on corn yield. The treatments included 1) a control with no sulfur and no nitrogen; 2) urea ammonium nitrate (UAN) (180 lb N/a; 0 lb S/a); and 3) UAN plus ammonium thiosulfate (ATS) (180 lb N/a; 15 lb S/a). Both the UAN and UAN+ATS were balanced to 180 lb N/a. These three treatments were evaluated at two locations in 2019 and three locations in 2020. Preliminary results show that yield trended upward with the application of nitrogen plus sulfur fertilization over N …
Timing, Source, And Placement Of Nitrogen Fertilizer Increases Wheat Yield And Protein Content In High Yielding Environments, L. M. Simão, D. A. Ruiz Diaz, R. P. Lollato
Timing, Source, And Placement Of Nitrogen Fertilizer Increases Wheat Yield And Protein Content In High Yielding Environments, L. M. Simão, D. A. Ruiz Diaz, R. P. Lollato
Kansas Agricultural Experiment Station Research Reports
The efficiency of nitrogen (N) fertilizer management depends on rate, timing, placement, and source, but the benefits of an integrated program have not been clearly quantified, to our knowledge. This study aimed to investigate the effects of integrated N management on winter wheat grain yield, grain protein content, grain test weight, and biomass in Kansas. The study consisted of two N management treatments: Normal (single N application as UAN using broadcast nozzles with the absence of urea inhibitors); and Progressive (split N application into two timings using streamer bars with urease inhibitors). Both treatments had similar results in all variables …
Do Different Wheat Varieties Respond Differently To Nitrogen Rates In Terms Of Grain Yield And Grain Protein Concentration In Kansas?, N. Giordano, R. P. Lollato
Do Different Wheat Varieties Respond Differently To Nitrogen Rates In Terms Of Grain Yield And Grain Protein Concentration In Kansas?, N. Giordano, R. P. Lollato
Kansas Agricultural Experiment Station Research Reports
Nitrogen management in wheat can result in positive impacts on grain yield and grain protein concentration (GPC) if addressed correctly. The aim of this study was to compare whether different varieties responded differently in terms of grain yield and GPC to management of nitrogen (N) rate across different environments. Factorial field experiments were carried out in a split-plot design in four different Kansas locations to evaluate the combination of four N rates (whole plot, 0, 40, 80, and 120 lb N/a) and fourteen different commercially available winter wheat varieties (sub-plots). Grain yield and GPC were measured at harvest maturity. The …
Wheat Variety Yield Response To Nitrogen And Sulfur Rates During The 2019–2020 Growing Season, B. R. Jaenisch, T. Wilson, N. Nelson, M. Guttieri, R. P. Lollato
Wheat Variety Yield Response To Nitrogen And Sulfur Rates During The 2019–2020 Growing Season, B. R. Jaenisch, T. Wilson, N. Nelson, M. Guttieri, R. P. Lollato
Kansas Agricultural Experiment Station Research Reports
Early spring visual sulfur (S) deficiency symptoms are increasingly a concern for Kansas wheat growers, but the extent of yield limitation due to S deficiencies and its interaction with nitrogen (N) supply is not well quantified in this environment. Our objective was to evaluate the responses of three wheat varieties to the interaction of N and S rates. The experiment was conducted in four Kansas locations during the 2019–2020 winter wheat growing season: Ashland Bottoms, Argonia, Belleville, and Hutchinson. These locations were selected to provide a range in soil textures and organic matter content, as these variables might impact the …
Kansas Fertilizer Research 2021
Kansas Fertilizer Research 2021
Kansas Agricultural Experiment Station Research Reports
A summary of research conducted in 2018-2020 on fertilizer use and management practices for crops in Kansas. Published in 2021 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Servicehttps://www.ag.k-state.edu/
Yield Response To Nitrogen Management In A Corn-Soybean Sequence In North Central Kansas, A. A. Correndo, I. A. Ciampitti
Yield Response To Nitrogen Management In A Corn-Soybean Sequence In North Central Kansas, A. A. Correndo, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
The aim of this study was to evaluate the response of corn (Zea mays L.) grain yield to nitrogen (N) fertilizer application and its residual effect on soybean (Glycine max(L.) Merr.) seed yield. During the 2020 growing season, a corn-soybean rotation study was continued at Scandia, KS (USA), evaluating five N fertilizer rates in corn under both dryland and irrigated conditions. Average corn grain yields ranged from 110 to 206 bu/a for dryland, and from 198 to 221 bu/a for irrigated conditions. Under dryland, maximum corn yields were achieved with an apparent soil N supply level …