Dynamics Of Post-Flowering Nitrogen Uptake And Nitrogen Recovery Efficiency Using 15n Isotope Labeling In Corn,
2020
Kansas State University
Dynamics Of Post-Flowering Nitrogen Uptake And Nitrogen Recovery Efficiency Using 15n Isotope Labeling In Corn, J. A. Fernandez, J. B. Nippert, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
In corn (Zea maysL.), breeding and selection for grain yield over time has been accompanied by a simultaneous increase in plant nitrogen (N) uptake. The understanding of plant N dynamics has attracted attention due to the environmental concerns related to N losses coming from fertilization. This research study was implemented to 1) describe N uptake and allocation dynamics, and 2) quantify fertilizer recovery efficiency across late-N strategies. Two field experiments (one under irrigation and one rainfed) were conducted at the Ashland Bottoms Research Farm, KS, during 2017. Three hybrids with different year of release and three N scenarios …
Corn Yield Response To Nitrogen In North-Central Kansas,
2020
Kansas State University
Corn Yield Response To Nitrogen 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 maysL.) grain yield to nitrogen (N) fertilizer. During the 2019 cropping season, an N rate experiment in corn was established in Scandia, KS, evaluating five N fertilizer rates as UAN (28-0-0) under both dryland and irrigated conditions. Average yields ranged from 138 to 236 bu/a under rainfed and from 153 to 249 bu/a for irrigated conditions. Under both dryland and irrigated conditions, maximum yields were achieved with an N rate of about 161 lb/a. Total N supply was calculated as N at planting plus fertilizer …
Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage,
2020
Kansas State University
Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
Trends from a tillage study conducted since 2011 have shown no clear differences between tillage systems for either corn or soybeans in lighter soils under irrigation. One year out of seven years has shown a yield advantage for either corn or soybeans for any tillage system, which appears to be related to environmental conditions experienced during the season. Averaged across all years of the study, the treatments with deep tillage either every or every-other year had about 3% higher corn yields, and soybeans had up to a 3% yield increase with some form of tillage.
Investigating The Use Of Unmanned Aerial Vehicles And High-Resolution Multispectral Imagery To Characterize Grain Sorghum Senescence Patterns,
2020
Kansas State University
Investigating The Use Of Unmanned Aerial Vehicles And High-Resolution Multispectral Imagery To Characterize Grain Sorghum Senescence Patterns, I. H. Barnhart, L. Mayor, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Grain sorghum is important to producers around the world. In precipitation-limited environments, sorghum is the grain of choice because it is able to produce grain yields with limited precipitation. Plant breeders place a priority on breeding for a characterized form of post-flowering drought-tolerance, known as stay-green (SG). Assessing thousands of plots for this trait can be labor intensive and time consuming, so the goal of this study was to use unmanned aircraft vehicles (UAVs) equipped with high resolution cameras to characterize and quantify senescence patterns in grain sorghum. A field experiment with 20 hybrids was planted in Manhattan, KS. The …
Physiological Changes Across Historical Sorghum Hybrids Released During The Last Six Decades,
2020
Kansas State University
Physiological Changes Across Historical Sorghum Hybrids Released During The Last Six Decades, P. A. Demarco, L. Mayor, S. Tamagno, J. A. Fernandez, P. V. Vara Prasad, J. L. Rotundo, C. D. Messina, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
For the last decades, sorghum (Sorghum bicolorL. Moench) improvement in the United States (US) has been related to targeted modifications in genotype, environment, and management (G × E × M) combinations. Retrospective studies are relevant to document changes in the phenotype associated to breeding process and to explore alternatives to improve yield and its physiological associated traits. This study aims to characterize yield changes over time for hybrids with different year of release. Field trials were conducted during 2018 and 2019 growing seasons in eight environments/site-years across the states of Kansas and Texas including 20 grain sorghum hybrids …
Long-Term Cover Crop Management Effects On Soil Health In Semiarid Dryland Cropping Systems,
2020
Kansas State University
Long-Term Cover Crop Management Effects On Soil Health In Semiarid Dryland Cropping Systems, L. M. Simon, A. K. Obour, J. D. Holman, K. L. Roozeboom
Kansas Agricultural Experiment Station Research Reports
Growing cover crops (CC) in semiarid drylands may provide benefits to soil health. This study examined long-term CC management effects in a no-till winter wheat-grain sorghum-fallow cropping system in southwest Kansas. Objectives were to assess the impacts of CCs on 1) soil organic carbon (SOC) and nitrogen (N) stocks, 2) soil susceptibility to erosion, as well as to 3) quantify the effects of haying cover crops as annual forages. Treatments were spring-planted and included peas for grain as well as one-, three-, and six-species CC mixtures of oats, triticale, peas, buckwheat, turnips, and radishes compared with conventional chemical-fallow. Half of …
Water Use And Productivity Of Teff, A Dairy Quality Forage Crop,
2020
Kansas State University
Water Use And Productivity Of Teff, A Dairy Quality Forage Crop, J. M. Davidson, R. M. Aiken, D. H. Min, G. J. Kluitenberg
Kansas Agricultural Experiment Station Research Reports
Teff grass can be a competitive summer annual forage in Kansas. Teff grass is a rapidly growing, high quality forage that could be a good option for producers in water-limited areas with a short growing season. The cultivar ‘Excalibur’ exhibited superior biomass (4280 lb/a) and crop water productivity (610 lb/a-in.), among teff cultivars. This study also indicated that biomass productivity and crop water productivity of sorghum sudangrass (696 lb/a-in.) tended to be greater than that of forage pearl millet (528 lb/a-in.). Further research into teff grass should focus on integration of teff into irrigation management systems with restricted water supply.
Dual Use Of Cover Crops For Forage Production And Soil Health In Dryland Crop Production,
2020
Kansas State University
Dual Use Of Cover Crops For Forage Production And Soil Health In Dryland Crop Production, A. K. Obour, J. D. Holman, L. M. Simon, S. K. Johnson
Kansas Agricultural Experiment Station Research Reports
Integrating a cover crop (CC) into dryland crop production in the semiarid central Great Plains (CGP) can provide several ecosystem benefits. However, CC adoption is slow and not widely popular in the CGP because CCs utilize water that otherwise would be available for the subsequent cash crop. Grazing or haying CCs can provide economic benefits to offset revenue loss associated with decreased crop yields when CCs are grown ahead of a cash crop. Objectives of the current research were to 1) determine forage production of CC mixtures, and 2) evaluate the impacts of removing CCs for forage on subsequent crop …
Soil Microbial Seasonal Community Dynamics In Response To Cover Crop And Phosphorus Fertilizer Usage In A No-Till Corn-Soybean System In 2018,
2020
Kansas State University
Soil Microbial Seasonal Community Dynamics In Response To Cover Crop And Phosphorus Fertilizer Usage In A No-Till Corn-Soybean System In 2018, C. L. Stewart, L. M. Starr, N. O. Nelson, K. L. Roozeboom, G. J. Kluitenberg, D. R. Presley, P. J. Tomlinson
Kansas Agricultural Experiment Station Research Reports
This study examined microorganism community composition in plots managed with and without cover crops and three contrasting phosphorous (P) fertilizer management techniques in a no-till corn-soybean system. This work was performed in the spring and fall of 2018 at the Kansas Agricultural Watershed Field Laboratory (KAW), Manhattan, KS. The study design was a 2 × 3 complete block factorial design with three replications, with cover crop presence or absence and three levels of P fertilizer management (control, fall broadcast, and spring injected). To examine microorganism community composition, phospholipid fatty acid (PLFA) analysis was used. Only the main effect of cover …
Response Of Dicamba/Fluroxypyr/Glyphosate-Resistant Kochia To Atrazine And Alternative Postemergence Herbicides,
2020
Kansas State University
Response Of Dicamba/Fluroxypyr/Glyphosate-Resistant Kochia To Atrazine And Alternative Postemergence Herbicides, R. Liu, V. Kumar, R. Currie, P. W. Geier, T. Lambert, P. W. Stahlman
Kansas Agricultural Experiment Station Research Reports
Two kochia accessions (KS-4A and KS-4H) were previously identified from a corn field near Garden City, KS, with multiple resistance to glyphosate (Roundup PowerMax), dicamba (Clarity), and fluroxypyr (Starane Ultra). The objectives of this research were to (1) determine the response of these kochia accessions to preemergence (PRE) and postemergence (POST) applied atrazine (Aatrex) in dose-response assays, and (2) determine the effectiveness of alternative POST herbicides. Seeds of a known susceptible kochia accession (SUS) collected from research fields in Hays, KS, were used for comparison. Greenhouse experiments were conducted at the Kansas State University Agricultural Research Center near Hays, KS, …
Response Of Kansas Feral Rye Populations To Aggressor Herbicide And Management In Coaxium Wheat Production System,
2020
Kansas State University
Response Of Kansas Feral Rye Populations To Aggressor Herbicide And Management In Coaxium Wheat Production System, V. Kumar, R. Liu, T. Lambert
Kansas Agricultural Experiment Station Research Reports
Feral rye (Secale cerealeL.), also commonly known as cereal or volunteer rye, is a troublesome winter annual grass weed species in wheat producing regions of the United States, including Kansas. Lack of effective herbicide options complicates the selective control of feral rye in winter wheat. The main objectives of this research were (1) to determine the response of 10 feral rye populations collected from central Kansas wheat fields to Aggressor herbicide in dose-response assays, and (2) to evaluate the effectiveness of Aggressor herbicide for feral rye control in CoAXium winter wheat in Kansas. Dose-response assays indicated that all …
2019 Kansas Summer Annual Forage Hay And Silage Variety Trial,
2020
Kansas State University
2019 Kansas Summer Annual Forage Hay And Silage Variety Trial, J. D. Holman, A. K. Obour, J. Lingenfelser, T. Roberts, S. Maxwell
Kansas Agricultural Experiment Station Research Reports
In 2019, summer annual forage variety trials were conducted across Kansas near Garden City, Hays, and Scandia. All sites evaluated hay and silage entries. Companies were able to enter varieties into any possible combinations of research sites, so not all sites had all varieties. Across the sites, a total of 95 hay varieties, 99 sorghum silage varieties, and 12 corn silage varieties were evaluated.
Weather Information For Garden City, 2019,
2020
Kansas State University
Weather Information For Garden City, 2019, J. Elliott
Kansas Agricultural Experiment Station Research Reports
Summary of 2019 weather for research conducted at the Garden City field location.
Wheat And Grain Sorghum In Four-Year Rotations,
2020
Kansas State University
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett
Kansas Agricultural Experiment Station Research Reports
In 1996, an effort began to quantify soil water storage, crop water use, and crop productivity on dryland systems in western Kansas. Research on 4-year crop rotations with wheat and grain sorghum was initiated at the Southwest Research-Extension Center near Tribune, KS. Rotations were wheat-wheat-sorghum-fallow (WWSF), wheat-sorghum-sorghum-fallow (WSSF), and continuous wheat (WW). Soil water at wheat planting averaged about 9 in. following sorghum, which is about 3 in. more than the average for the second wheat crop in a WWSF rotation. Soil water at sorghum planting was only about 1.5 in. less for the second sorghum crop compared to sorghum …
Large-Scale Dryland Cropping Systems,
2020
Kansas State University
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008–2019 at the Kansas State University Southwest Research- Extension Center near Tribune, KS. The purpose of the study was to identify whether more intensive cropping systems can enhance and stabilize production in rainfed cropping systems to optimize economic crop production, more efficiently capture and utilize scarce precipitation, and maintain or enhance soil resources and environmental quality. The crop rotations evaluated were continuous grain sorghum (SS), wheat-fallow (WF), wheat-corn-fallow (WCF), wheat-sorghum-fallow (WSF), wheat-corn-sorghum-fallow (WCSF), and wheat-sorghum-corn-fallow (WSCF). All rotations were grown using no-tillage practices except for WF, which was grown using reduced-tillage. The efficiency of precipitation …
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation,
2020
Kansas State University
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel, A. Burnett
Kansas Agricultural Experiment Station Research Reports
This study was initiated in 1991 at the Kansas State University Southwest Research- Extension Center near Tribune, KS. The purpose of the study was to identify the effects of tillage intensity on precipitation capture, soil water storage, and grain yield in a wheat-sorghum-fallow rotation. Grain yields of wheat and grain sorghum increased with decreased tillage intensity in a wheat-sorghum-fallow (WSF) rotation. In 2019, available soil water at sorghum planting was greater for no-tillage (NT) than reduced tillage (RT) which was greater than conventional tillage (CT). For wheat there was a similar pattern as sorghum, with available soil water at wheat …
Alternative Cropping Systems With Limited Irrigation,
2020
Kansas State University
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, H. D. Bond
Kansas Agricultural Experiment Station Research Reports
A limited irrigation study involving four cropping systems and evaluating four crop rotations was initiated in 2012 at the Southwest Research-Extension Center near Tribune, KS. The cropping systems were two annual systems (continuous corn [C-C] and continuous grain sorghum [GS-GS]) and two 2-year systems (corn-grain sorghum [C-GS] and corn-winter wheat [C-W]). In 2019, corn yields were similar for all rotations, although averaged across the past 7 years, corn yields were greater following wheat than following corn. There were no significant differences in grain sorghum yields in 2019, which was similar to the multi-year average. Wheat yields were greater than the …
Estimating Annual Forage Yields With Plant Available Water And Growing Season Precipitation,
2020
Kansas State University
Estimating Annual Forage Yields With Plant Available Water And Growing Season Precipitation, J. Holman, A. Obour, A. Schlegel, T. Roberts, S. Maxwell
Kansas Agricultural Experiment Station Research Reports
Forage production is important for the western Kansas region’s livestock and dairy industries and has become increasingly important as irrigation-well capacity declines. Forages require less water than grain crops and may allow for increased cropping intensity and opportunistic cropping. Being able to estimate forage production is important for determining forage availability versus forage needs. Data from several studies were used to quantify annual forage yield response to plant available water (PAW) at planting and growing season precipitation (GSP). In addition, water use efficiency was quantified. Forages evaluated included winter triticale, spring triticale, and forage sorghum.
Early Postemergence And Sequential Herbicides For Weed Control In Corn,
2020
Kansas State University
Early Postemergence And Sequential Herbicides For Weed Control In Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
In this study, herbicides were tested to compare sequential and split rates for weed control in corn. Control of green foxtail, Russian thistle, and quinoa was excellent regardless of herbicide treatment, and most herbicides provided good kochia and Palmer amaranth control. Minor corn injury occurred with some herbicides applied early postemergence or postemergence, but did not persist. All herbicide treatments increased grain yield 56 to 78% compared to the weedy control, but yields did not differ between herbicide treatments.
Single And Sequential Herbicide Treatments For Efficacy In Corn,
2020
Kansas State University
Single And Sequential Herbicide Treatments For Efficacy In Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
In this study, herbicides were tested to compare application of single and sequential treatments for weed control in corn. Quinoa and Russian thistle control was 95% or more regardless of herbicide treatment. Anthem Maxx, Resicore, and Corvus followed by Harness Max provided good control of Palmer amaranth. Acuron applied preemergence and Anthem Maxx plus Callisto and atrazine early postemergence were less effective on kochia than other herbicides, whereas Anthem Maxx plus Callisto and atrazine applied preemergence and Halex GT applied early postemergence were less effective on green foxtail. Grain yields from all herbicide-treated corn were substantially greater than for the …
