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Articles 1 - 30 of 66
Full-Text Articles in Agronomy and Crop Sciences
Crop Adaptation And Improvement For Drought-Prone Environments, Ndjido A. Kane, Ed., Daniel Foncéka, Ed., Timothy J. Dalton, Ed.
Crop Adaptation And Improvement For Drought-Prone Environments, Ndjido A. Kane, Ed., Daniel Foncéka, Ed., Timothy J. Dalton, Ed.
NPP eBooks
This book focuses on three important elements in the development of cereal and legume crops in semi-arid West Africa. The first section illustrates the socioeconomic factors that affect the food system for these crops and contains an overview of crop production and consumption in the region. Then, important inputs that affect system productivity are presented: preferences for new seed varieties, yield response to fertilizer, counterfeit herbicides, climate information, and the way farmers develop expectations about the weather events that shape cropping outcomes. The final chapter of section one is dedicated to understanding urban consumer preferences for processed food products derived …
A Tribute To Freddie R. Lamm, D. Rogers, J. Aguilar, A. R. Tomlinson
A Tribute To Freddie R. Lamm, D. Rogers, J. Aguilar, A. R. Tomlinson
Kansas Agricultural Experiment Station Research Reports
Freddie Lamm, who positively impacted many through his life and career, passed away on May 26, 2022. Kansas State University and the agricultural irrigation research community lost a great contributor to their field. Lamm was the research irrigation engineer at the Northwest Research-Extension Center in Colby, Kansas. He passed away sooner than his family, friends, and colleagues were ready for—before his planned retirement from his remarkable career. View the PDF linked to the right-hand column to learn more about his legacy.
Weather Information For Tribune, D. Bond, J. Slattery
Weather Information For Tribune, D. Bond, J. Slattery
Kansas Agricultural Experiment Station Research Reports
Summary of 2021 weather for research conducted at the Tribune Kansas Agricultural Experiment Station field location.
Glyphosate-Resistant Palmer Amaranth Control In Xtendflex Soybean, R. Liu, V. Kumar, T. L. Lambert
Glyphosate-Resistant Palmer Amaranth Control In Xtendflex Soybean, R. Liu, V. Kumar, T. L. Lambert
Kansas Agricultural Experiment Station Research Reports
XtendFlex soybean is a triple-stacked trait technology that allows growers to use dicamba (XtendiMax) and glufosinate (Liberty) for in-season control of glyphosate-resistant (GR) weed species, including Palmer amaranth. A field study was conducted at the Kansas State University Agricultural Research Center (KSU-ARCH) near Hays, KS, to determine the effectiveness of POST applied XtendiMax and Liberty alone or in sequential applications for GR Palmer amaranth control in XtendFlex soybean. The study site had a natural infestation of GR Palmer amaranth. Results showed that early post-emergence (EPOST) applications of XtendiMax or Liberty followed by (fb) a late post-emergence (LPOST) application …
Environment And Nitrogen Rate Play Significant Roles In Winter Wheat Response To Nitrogen Management Intensification, L. M. Simão, D. A. Ruiz Diaz, R. P. Lollato
Environment And Nitrogen Rate Play Significant Roles In Winter Wheat Response To Nitrogen Management Intensification, L. M. Simão, D. A. Ruiz Diaz, R. P. Lollato
Kansas Agricultural Experiment Station Research Reports
Poor nitrogen (N) management is among the leading causes of winter wheat (Triticum aestivumL.) yield gaps in Kansas, and sowing date—which is impacted by crop rotation—is among the most important variables determining winter wheat’s attainable yields in the U.S. central Great Plains. This research aimed to investigate the relationship between N management strategies and various cropping systems in Kansas. The treatments consisted of nine combinations of three N management practices (standard, progressive, and green N) and five crop sequences (WtWt = continuous winter wheat; SyWt = winter wheat after soybean; TrSyWt = triticale (hay) – soybean – winter …
Evaluation Of Grazing Options During Summer For Growing Heifers – Year 2, J. K. Farney
Evaluation Of Grazing Options During Summer For Growing Heifers – Year 2, J. K. Farney
Kansas Agricultural Experiment Station Research Reports
Developing methods to provide high quality forage through most of the year is important for cattle operations. The purpose of this study was to determine forage management options to offset the summer “slump” with fescue. Four grass pasture treatments (10 pastures total; 4 acres each) were used in a completely randomized design and stocked with growing heifers (n = 49; initial wt 473 ± 60 lb). Pasture treatments consisted of novel fescue (FES), crabgrass (CRAB), bermudagrass (BERM), and sorghum-sudan interseeded into novel fescue (SS-FES). Heifers were weighed and grazed pastures from April to September (153 d). Heifers on FES were …
Assure Ii Alone And With Tacoma And Classic For Efficacy In Fallow, R. S. Currie, P. W. Geier
Assure Ii Alone And With Tacoma And Classic For Efficacy In Fallow, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of this trial was to compare Assure II (quizalofop) at two rates with or without tank mix partners for grass control in fallow. Assure II at either rate alone provided similar control of volunteer corn and barley. Corn control was 90% or more regardless of rating date with all herbicides except Assure II at 8.0 oz/a plus Classic (chlorimuron) at 42 days after treatment (DAT). Tacoma (fenoxaprop) at 3.5 or 5.4 oz/a added to Assure II at 8.0 oz/a improved barley control later in the season.
Yield Response To Nitrogen Management In A Corn-Soybean Sequence In North Central Kansas – 2021 Season, A. A. Correndo, O. Lanza Lopez, L. F. A. Almeida, I. A. Ciampitti
Yield Response To Nitrogen Management In A Corn-Soybean Sequence In North Central Kansas – 2021 Season, A. A. Correndo, O. Lanza Lopez, L. F. A. Almeida, 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 application and its residual effect on soybean [Glycine max(L.) Merr.] seed yield. During the 2021 growing season, a corn-soybean rotation study was continued at Scandia, KS (USA), evaluating the effect of five N fertilizer rates (0, 53, 107, 161, and 214 lb N/a) applied in corn under both dryland and irrigated conditions. Average corn grain yields ranged from 124 to 147 bu/a for dryland, and from 159 to 203 bu/a for irrigated conditions. However, no significant …
Imiflex Rates For Efficacy In Imidazolinone-Tolerant Grain Sorghum, R. S. Currie, P. W. Geier
Imiflex Rates For Efficacy In Imidazolinone-Tolerant Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to compare ImiFlex rates and timings for efficacy and crop response in imidazolinone-tolerant grain sorghum. Volunteer corn and Johnsongrass control was generally best when ImiFlex (imazamox) was applied postemergence (POST), except when tank mixed with Huskie (bromoxynil/pyrasulfotole). Likewise, Palmer amaranth control was most consistent when ImiFlex was applied POST. Though all herbicides increased grain yields relative to the weedy controls, yields increased the most when Moccasin II Plus (metolachlor) plus Motif (mesotrione) preemergence (PRE) was followed by ImiFlex POST or Moccasin II Plus and Sharpen (saflufenacil) PRE was followed by ImiFlex plus atrazine POST.
Comparison Of Sensitivity To Fusarium Head Blight In Soft Red And Hard Red Winter Wheat Varieties, G. Sassenrath, K. Andersen Onofre, J. Lingenfelser, X. Lin
Comparison Of Sensitivity To Fusarium Head Blight In Soft Red And Hard Red Winter Wheat Varieties, G. Sassenrath, K. Andersen Onofre, J. Lingenfelser, X. Lin
Kansas Agricultural Experiment Station Research Reports
Fusarium head blight (scab) is a problem for wheat production in high rainfall areas. This is a report of research examining the response of wheat varieties on disease susceptibility and wheat yield and quality. Hard red wheat varieties had more disease than the soft red wheat varieties in 2021. Wheat yield was correlated with disease severity.
Reclaiming Old World Bluestem Pasture With Imazapyr Application And Native Grass Overseeding, Keith Harmoney
Reclaiming Old World Bluestem Pasture With Imazapyr Application And Native Grass Overseeding, Keith Harmoney
Kansas Agricultural Experiment Station Research Reports
Old world bluestems (OWB), mainly Caucasian bluestem (Bothriochloa bladhii) and yellow bluestem(Bothriochloa ischaemum)introduced from parts of eastern Europe, Asia, Africa, and Australia, have been shown to reduce abundance and diversity of some insect and wildlife species compared to native grasses when these OWB grasses form dense stands. These OWBs have been invading native pastures in the southern Great Plains and are rapidly increasing in the amount of area occupied in Kansas. Two landowners purchased pasture property in Ellsworth County, KS, and observed that Caucasian old world bluestem had increased in the pasture significantly over the course …
Bermudagrass Under Different Fertility And Harvest Management Practices, B. C. Pedreira, D. Helwig, M. Haywood, J. K. Farney, G. Sassenrath
Bermudagrass Under Different Fertility And Harvest Management Practices, B. C. Pedreira, D. Helwig, M. Haywood, J. K. Farney, G. Sassenrath
Kansas Agricultural Experiment Station Research Reports
A second year of a bermudagrass fertility study was conducted at the K-State Research and Experiment Station outside of Columbus, KS, in 2021. The purpose of the study was to simulate forage producers’ practices of managing bermudagrass and determine how each practice affected forage production and quality.
Efficient Irrigation Technologies For Corn—A Comparison, F. R. Lamm, D. M. O'Brien
Efficient Irrigation Technologies For Corn—A Comparison, F. R. Lamm, D. M. O'Brien
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2016–2021 at the Kansas State University Northwest Research-Extension Center near Colby, KS. Two irrigation systems, subsurface drip irrigation (SDI) and mobile drip irrigation (MDI) were compared for two irrigation capacities equivalent to 0.25 in./day and 0.167 in./day. Irrigation amounts were similar for the two systems when comparing the equivalent capacities, averaging 13.3 and 11.4 inches per acre. When averaged over the six-year period, SDI and MDI corn grain yields were 242.5 and 239.2 bu/a, respectively. Although irrigation amounts for the two systems at an equivalent irrigation capacity were similar, total crop water use was less …
Soybean Seed Yield Productivity And Biological Nitrogen Fixation In Kansas, L. F. A. Almeida, A. A. Correndo, E. Adee, S. Dooley, I. A. Ciampitti
Soybean Seed Yield Productivity And Biological Nitrogen Fixation In Kansas, L. F. A. Almeida, A. A. Correndo, E. Adee, S. Dooley, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Soybean [Glycine max(L.) Merr.] productivity (seed yield) and biological nitrogen fixation (BNF) were evaluated in response to different fertilization strategies. The study comprised four different locations in Kansas during the 2021 growing season, two irrigated (Topeka and Scandia) and two dryland (Kiro and Ashland Bottoms) sites. Greater seed yields were recorded in Topeka and Kiro (80 bu/a) relative to Scandia (55 bu/a) and Ashland Bottoms (51 bu/a), without observing fertilizer effects on yields. Overall, the relative abundance of ureides (% RAU), an indicator of the level of BNF, increased as the crop matured and showed a negative association …
Do Late Season Soybean Management Practices Impact Seed Yields In East Kansas?, A. A. Correndo, L. F. A. Almeida, E. Adee, I. A. Ciampitti
Do Late Season Soybean Management Practices Impact Seed Yields In East Kansas?, A. A. Correndo, L. F. A. Almeida, E. Adee, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
In soybean (Glycine max[L.] Merr.), maintaining favorable growth conditions (e.g., water, solar radiation, and nutrients) during the seed filling period is crucial to avoid limitations that could reduce seed weight and ultimately constrain seed yield. The objective of this study was to explore potential effects and identify if “late-season” management practices can contribute to increasing seed weight and seed yield in soybeans.
Cover Crop Grazing Effects On Soil Compaction Indicators In Western And Central Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom
Cover Crop Grazing Effects On Soil Compaction Indicators In Western And Central Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom
Kansas Agricultural Experiment Station Research Reports
Grazing cover crops (CCs) on no-till (NT) croplands in western and central Kansas could increase the profitability of crop production in these water-limited environments. However, little information exists about potential soil compaction associated with grazing CCs in these cropping systems. From 2019 to 2021, two studies investigated the effects of grazing CCs on soil bulk density and penetration resistance in NT cropping systems. At the Kansas State University HB Ranch near Brownell, KS, CCs grazed with yearling heifers were compared to ungrazed CCs and fallow under NT or occasional tillage (OT). In another study, CCs grazed with yearlings or cow-calf …
Roundup 2022: Agricultural Research Center-Hays
Roundup 2022: Agricultural Research Center-Hays
Kansas Agricultural Experiment Station Research Reports
Roundup is the major beef cattle education and outreach event sponsored by the Kansas State University Agricultural Research Center - Hays. This report communicates timely, applicable research information on beef production and rangeland topics.
Using Cover Crops To Control Weeds And Improve Soil Health, J. Dille, A. Hewitt, G. Sassenrath
Using Cover Crops To Control Weeds And Improve Soil Health, J. Dille, A. Hewitt, G. Sassenrath
Kansas Agricultural Experiment Station Research Reports
Herbicide-resistant weeds are challenging for producers to control in crop fields. This study explores the potential of cover crops to reduce weed pressure and improve soil health. Cover crops that had good canopy development, including grasses such as ryegrass and wheat, had the best weed control. Soybean yields were similar for all cover crops, though there was a trend towards lower yields for the brassica cover crops, Graza radish and forage collards. Soybeans grown after ryegrass had the highest yields.
Southeast Kansas Winter Wheat Variety Test Results - 2021, G. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin
Southeast Kansas Winter Wheat Variety Test Results - 2021, G. Sassenrath, L. Mengarelli, J. Lingenfelser, X. Lin
Kansas Agricultural Experiment Station Research Reports
This is a summary of the winter wheat production conditions in southeast Kansas in 2020-2021 and the results of the winter wheat variety testing. Wheat production in 2021 benefited from dry conditions at planting and harvest. Overall yields were above multi-year averages. As in previous years, soft red winter wheat out-yielded hard red winter wheat varieties.
Katagon At Two Timings Compared To Standards In Corn, R. S. Currie, P. W. Geier
Katagon At Two Timings Compared To Standards In Corn, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of this trial was to compare Katagon (tolpyralate/nicosulfuron) to standard treatments for weed control in corn. Katagon plus atrazine applied early postemergence was as effective as any herbicide tested on the weeds present. When application timing was delayed to late postemergence, most herbicides were less effective. Early season corn injury was minor and did not persist. Although most herbicide treatments increased yields relative to the non-treated control, yields were generally best when any treatment was applied early postemergence.
Weather Information For Garden City, 2021, E. Russell
Weather Information For Garden City, 2021, E. Russell
Kansas Agricultural Experiment Station Research Reports
Summary of 2021 weather for research conducted at the Garden City Kansas Agricultural Experiment Station field location.
Firstact For Efficacy In Accase-Tolerant Grain Sorghum, R. S. Currie, P. W. Geier
Firstact For Efficacy In Accase-Tolerant Grain Sorghum, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to compare FirstAct with several tank mix partners for efficacy in herbicide-tolerant grain sorghum. FirstAct (quizalofop) alone or in tank mixtures controlled Johnsongrass 94% or more. However, tank mixing FirstAct with any broadleaf herbicide was generally antagonistic to Palmer amaranth control. Minor sorghum injury was 5% or less by four weeks after postemergence treatment. Sorghum yields increased with all postemergence treatments except with atrazine alone.
Industrial Weed Control With Plainview, Esplanade, And Method Application Timings, R. S. Currie, P. W. Geier
Industrial Weed Control With Plainview, Esplanade, And Method Application Timings, R. S. Currie, P. W. Geier
Kansas Agricultural Experiment Station Research Reports
The objective of this trial was to compare Plainview, Esplanade, and Method at three applications for season-long weed control in noncropland. Glyphosate alone provided no residual weed control. Plainview (indaziflam/aminocyclopyrachlor/imazapyr) at 64 oz/a applied in the early or late fall controlled kochia similarly to Krovar (bromacil/ diuron) late in the season. Either rate of Plainview, as well as the tank mixture of Esplanade (aminocyclopyrachlor) plus Method (indaziflam), provided complete woollyleaf bursage control regardless of application timing. No treatment of Krovar controlled woollyleaf bursage more than 60%.
2022 Kansas Fertilizer Research Report
2022 Kansas Fertilizer Research Report
Kansas Agricultural Experiment Station Research Reports
A summary of research conducted in 2018-2021 on fertilizer use and management practices for crops in Kansas. Published in 2022 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Service
https://www.ag.k-state.edu/.
Forage Crop Water Use And Production Under Dryland Conditions, R. Aiken, F. Lamm
Forage Crop Water Use And Production Under Dryland Conditions, R. Aiken, F. Lamm
Kansas Agricultural Experiment Station Research Reports
Forage crops contribute diversity and buffer agronomic risk in water-limited cropping systems. Knowledge of growth responses to uncertain water supply can help guide crop selection and management—including timing of harvest. Our research objective was to determine water use and growth responses of forage winter triticale and forage sorghum under rainfed conditions.
Efficacy Of Miticides Applied At Tassel Stage For The Control Of Spider Mites In Corn, 2020, A. Zukoff
Efficacy Of Miticides Applied At Tassel Stage For The Control Of Spider Mites In Corn, 2020, A. Zukoff
Kansas Agricultural Experiment Station Research Reports
Spider mite populations peaked during the week of August 19 and declined rapidly by August 26. Mite populations were made up entirely of two-spotted spider mites (Tetranychus urticae). The Portal with Exponent, Oberon, and Zeal treatments provided the best season-long control in this trial while Portal, Onager, and Mitomax II provided the most control 14 to 21 days after treatment. The lowest overall reduction in predatory mites during the season, when compared to control plots, occurred in the Portal and Onager treatments.
Deficit Irrigation Strategies For Subsurface Drip-Irrigated Alfalfa, F. R. Lamm, R. Reyes-Esteves, K. R. Harmoney
Deficit Irrigation Strategies For Subsurface Drip-Irrigated Alfalfa, F. R. Lamm, R. Reyes-Esteves, K. R. Harmoney
Kansas Agricultural Experiment Station Research Reports
This subsurface drip-irrigated study was conducted from 2020 to 2021 at the Kansas State University Northwest Research-Extension Center near Colby, KS, to evaluate five deficit irrigation strategies for alfalfa. All strategies were irrigated similarly (100% of Evapotranspiration (ET) minus Rain) through the first seasonal cutting. Following the first cutting, treatments were 1) Irrigate to replace 85% ET minus Rain; 2) Irrigate to replace 50% ET minus Rain between Cutting 2 and 3, then 85% ET-Rain; 3) Irrigate to replace 50% ET minus Rain between Cutting 2 and 4, then 85% ET-Rain; 4) Irrigate to replace 70% ET minus Rain between …
Intensification Of Sprinkler-Irrigated Corn Production, F. R. Lamm
Intensification Of Sprinkler-Irrigated Corn Production, F. R. Lamm
Kansas Agricultural Experiment Station Research Reports
This corn intensification study was conducted under sprinkler irrigation from 2020 to 2021 at the Kansas State University Northwest Research-Extension Center near Colby, KS. Two corn hybrids (Pioneer 1197 and Pioneer 1089) were grown with advanced fertilization at three plant densities (42,000, 38,000, and 34,000 plants/a) using three irrigation levels (115, 100, or 85% of calculated well-watered ET minus rain). As anticipated, there was no additional need for irrigation above normal amounts (100% of ET - Rain), giving further evidence that crop intensification is possible without negatively affecting water resource use. Yields were excellent in both years, averaging 227 bu/a …
Corn Tiller Yield Contributions Are Dependent On Environment: A 17 Site-Year Kansas Study, R. L. Veenstra, D. Berning, P. Carter, S. Wallace, M. Legleiter, L. Currie, C. D. Messina, P. V. Vara Prasad, T. J. Hefley, L. A. Haag, I. A. Ciampitti
Corn Tiller Yield Contributions Are Dependent On Environment: A 17 Site-Year Kansas Study, R. L. Veenstra, D. Berning, P. Carter, S. Wallace, M. Legleiter, L. Currie, C. D. Messina, P. V. Vara Prasad, T. J. Hefley, L. A. Haag, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Historic breeding efforts in corn (Zea maysL.) have resulted in uniform, single-stalked phenotypes with limited potential for environmental plasticity. Therefore, plant density is a critical yield component for corn, as corn is unable to successfully compensate for a deficit of plants. Other grass crop species can overcome plant density deficits via vegetative branching (tillering), but this trait is historically undesirable in corn. Improving corn flexibility across plant densities has potential benefits, particularly considering diverse yield environments and seasonal weather uncertainties due to climate change. The present study evaluated tiller presence with two hybrids in a range of plant …
Wheat Yield Response To Nitrogen Rate Depends On Foliar Fungicide Application, R. P. Lollato, L. O. Pradella, N. Giordano, L. Ryan, L. M. Simão, J. R. Soler
Wheat Yield Response To Nitrogen Rate Depends On Foliar Fungicide Application, R. P. Lollato, L. O. Pradella, N. Giordano, L. Ryan, L. M. Simão, J. R. Soler
Kansas Agricultural Experiment Station Research Reports
Nitrogen (N) and fungicide are among the most important factors impacting wheat yields in Kansas. However, there is limited information on whether foliar fungicides interact with N rates in wheat yield determination. Thus, our objectives were to evaluate wheat yield as impacted by different N rates with or without the use of foliar fungicide. One field experiment was established using a factorial structure of five N rates (0, 30, 60, 90, and 120 pounds of N per acre) by two fungicide management practices (either absent or 13 fluid ounces per acre of Nexicor) in a split-plot design near Hutchinson, KS, …