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Carcass Trait Trends For Steers And Heifers Finished Through The Tri-County Steer Carcass Futurity Cooperative From 2002 Through 2018, E. D. Mccabe, M. E. King, K. E. Fike, M. Groves, K. G. Odde Jan 2021

Carcass Trait Trends For Steers And Heifers Finished Through The Tri-County Steer Carcass Futurity Cooperative From 2002 Through 2018, E. D. Mccabe, M. E. King, K. E. Fike, M. Groves, K. G. Odde

Kansas Agricultural Experiment Station Research Reports

Objective: The objective was to evaluate trends in carcass characteristics for steers and heifers finished through the Tri-County Steer Carcass Futurity Cooperative.

Study Description: Data analyzed included 74,207 steers and 33,529 heifers finished at the Tri-County Steer Carcass Futurity Cooperative (Lewis, IA) and harvested from 2002 through 2018. Steers and heifers were harvested at liveweights of 1,235.0 +/- 119.8 lb and 1,124.2 +/- 106.7 lb, respectively. Carcass trait trends evaluated for steers and heifers included calculated yield grade score, backfat thickness, hot carcass weight, kidney, pelvic, heart, fat percentage, marbling score, and ribeye area ...


Evaluation Of Long-Term Phosphorus Fertilizer Placement Effect On Soil Phosphorus And Crop Yield, M. J. Coelho, D. A. Ruiz Diaz Jan 2021

Evaluation Of Long-Term Phosphorus Fertilizer Placement Effect On Soil Phosphorus And Crop Yield, M. J. Coelho, D. A. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Phosphorus (P) accumulation in soil with long-term P fertilizer placements can result in a potentially large available reserve of this nutrient for subsequent crop production. This study investigated the effect of phosphorus fertilizer management (placement: broadcast versus deep band) after ten years on soil P, and yield response of crop rotation. Field studies were conducted for a period of ten years in Manhattan, KS. Three treatments were evaluated: 1) control with no P fertilizer application and two fertilizer treatments (80 lb P2O5/a); 2) surface broadcast; and 3) deep band at approximately 4- to 6-in. depth. All ...


Weed Control With Single And Split Herbicide Applications In Corn, R. S. Currie, P. W. Geier Jan 2021

Weed Control With Single And Split Herbicide Applications In Corn, R. S. Currie, P. W. Geier

Kansas Agricultural Experiment Station Research Reports

The objective of the study was to compare season-long weed control from single and sequential herbicide applications in corn. Kochia control was 90% or more late in the season, and did not differ among herbicides. All herbicides except Lumax EZ provided 90% or more Russian thistle control by the season’s end. Palmer amaranth control was lowest when Bicep II Magnum was applied preemergence (PRE) and followed by Lexar EZ postemergence (POST), and when Acuron was applied PRE and again POST. Compared to the untreated control, corn receiving herbicide treatments yielded more than three times as much grain, but yields ...


Evaluating Traditional And Modern Laboratory Techniques For Determining Permanent Wilting Point, N. Parker, A. Patrignani Jan 2021

Evaluating Traditional And Modern Laboratory Techniques For Determining Permanent Wilting Point, N. Parker, A. Patrignani

Kansas Agricultural Experiment Station Research Reports

The permanent wilting point is often considered the lower limit for plant available water and can be measured in the laboratory using a pressure plate apparatus (traditional method) or a dewpoint water potential meter (modern method). However, recent evidence suggests substantial discrepancy between the soil moisture at the permanent wilting points derived from these two laboratory techniques. This preliminary study investigated the magnitude of the discrepancy between permanent wilting points derived from traditional and modern laboratory techniques and the concomitant effects on plant available water estimations. For the analysis, a total of 21 undisturbed soil samples were collected from the ...


Preliminary Classification Of Soil, Plant, And Residue Cover Using Convolutional Neural Networks, D. Nahitiya, M. N. Bisheh, R. P. Lollato, A. Patrignani Jan 2021

Preliminary Classification Of Soil, Plant, And Residue Cover Using Convolutional Neural Networks, D. Nahitiya, M. N. Bisheh, R. P. Lollato, A. Patrignani

Kansas Agricultural Experiment Station Research Reports

In agricultural fields, knowledge about the proportion of the soil surface covered with crop residue and vegetation canopy is key for improving soil and water conservation practices. In this study we trained a deep convolutional neural network to automate the classification of bare soil, crop stubble, and live vegetation from downward-facing images of agricultural fields. A comprehensive generic dataset, consisting of 3300 training and 645 test images, was collected from agricultural fields across Kansas State University Agricultural Experiment Stations and the Natural Resources Conservation Service Plant Material Center located near Manhattan, KS. Despite the intricate patterns and color textures resulting ...


Yield Response To Nitrogen Management In A Corn-Soybean Sequence In North Central Kansas, A. A. Correndo, I. A. Ciampitti Jan 2021

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 ...


Field Station Weather Reports, M. Knapp, E. A. Adee Jan 2021

Field Station Weather Reports, M. Knapp, E. A. Adee

Kansas Agricultural Experiment Station Research Reports

This report includes the annual summary of precipitation from 2020 at the research locations represented in the 2021 field report and further details about the Kansas River Valley locations and the east central Kansas locations.


On-Farm Assessment Of Aquaspy Soil Moisture Sensors For Irrigation Scheduling, P. Rossini, A. Patrignani Jan 2021

On-Farm Assessment Of Aquaspy Soil Moisture Sensors For Irrigation Scheduling, P. Rossini, A. Patrignani

Kansas Agricultural Experiment Station Research Reports

The aim of this study was to compare a commercially-available radio-frequency (RF) spectroscopy soil moisture sensor with an array of calibrated research-grade soil water reflectometers in a no-till irrigated corn field from June to September 2020. The RF probe consisted of 12 sensors spaced at 4-inch intervals across 48 inches in length, while the array of soil water reflectometers consisted of four sensors deployed along the soil profile at 4, 12, 20, and 28 in. depth. Soil moisture sensors were installed at approximately 30-ft apart in two different regions within the same field characterized by contrasting soil textural classes. Hourly ...


Co-Inoculation And Sulfur Fertilization In Soybeans, L. H. Moro Rosso, A. F. De Borja Reis, S. L. Naeve, I. A. Ciampitti Jan 2021

Co-Inoculation And Sulfur Fertilization In Soybeans, L. H. Moro Rosso, A. F. De Borja Reis, S. L. Naeve, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Soybeans [Glycine max (L.) Merr.] rely on large nutrient uptake, especially nitrogen (N), to produce seeds with high nutritional value. Biological N fixation (BNF) supplies most of the plant N demand and enhancement of this process might improve cropping systems’ sustainability. Although seed inoculation with Bradyrhizobium spp. for soybean crop is a well-known management practice, co-inoculation with the freeliving N-fixer Azospirillum brasilense has not been deeply investigated in the US, to our knowledge. Thus, this research explores the effect of co-inoculation with A. brasilense on soybean yield and seed nutritional quality (protein, oil, essential and sulfur (S) amino acids concentration ...


Control Of Volunteer Enlist Corn In Enlist E3 Soybean, R. Liu, I. Effertz, T. Lambert, V. Kumar Jan 2021

Control Of Volunteer Enlist Corn In Enlist E3 Soybean, R. Liu, I. Effertz, T. Lambert, V. Kumar

Kansas Agricultural Experiment Station Research Reports

Recent development of Enlist corn allows the use of 2,4-D choline (Enlist One), glyphosate (Roundup PowerMax), glufosinate (Liberty), and aryloxyphenoxypropionate (FOPs) herbicides for controlling grass and broadleaf weeds. However, volunteer Enlist corn plants can cause infestation in subsequent Enlist E3 soybean (resistant to 2,4-D, glyphosate, and glufosinate) in areas where a corn-soybean rotation is commonly practiced. The main objective of this research was to determine the effectiveness of cyclohexanedione (DIMs) herbicides alone or in tank-mixtures with Enlist One for Enlist corn control in Enlist E3 soybean. A field study was conducted in the 2020 growing season at the ...


Effect Of Tank-Mixing Glyphosate, Dicamba, And Graminicides On Grass Weed Control In Roundup Ready 2 Xtend Soybeans, R. Liu, I. Effertz, T. Lambert, A. Jhala, V. Kumar Jan 2021

Effect Of Tank-Mixing Glyphosate, Dicamba, And Graminicides On Grass Weed Control In Roundup Ready 2 Xtend Soybeans, R. Liu, I. Effertz, T. Lambert, A. Jhala, V. Kumar

Kansas Agricultural Experiment Station Research Reports

The adoption of Roundup Ready 2 Xtendsoybean allows growers to use dicamba (Xtendimax or Engenia) in mixtures with glyphosate (Roundup PowerMax) or graminicides (Select Max or Assure II) for broad spectrum weed control. However, anecdotal evidence suggests that Xtendimax may cause antagonism when applied with Select Max and/or Assure II herbicides. The main objective of this study was to determine the effectiveness of Roundup PowerMax, Select Max, and/or Assure II alone or in tank-mixtures with Xtendimax for grass weed control in Xtendsoybean. Field studies were conducted in 2020 at the Kansas State University Agricultural Research Center (KSU-ARC) near ...


Efficacy Of Imiflex, Zest, And Assure Ii On Green Foxtail Control, V. Kumar, I. Effertz, T. Lambert, R. Liu, B. Bean Jan 2021

Efficacy Of Imiflex, Zest, And Assure Ii On Green Foxtail Control, V. Kumar, I. Effertz, T. Lambert, R. Liu, B. Bean

Kansas Agricultural Experiment Station Research Reports

Grass weeds pose a serious management challenge in grain sorghum. Recent development of three herbicide-tolerant grain sorghum technologies such as Inzen, Igrowth, and DoubleTeam will provide the opportunity for producers to use nicosulfuron (Zest), imazamox (Imiflex), and quizalofop-p-ethyl (FirstAct) for grass weed control, respectively. The main objectives of this research were to (1) determine the effectiveness of Imiflex applied preemergence (PRE) on green foxtail control in comparison to commonly used group 15 herbicides; (2) compare the efficacy of Zest, Imiflex, and Assure II applied early- or late-POST at two different rates; and (3) determine the tank-mix compatibility of Zest, Imiflex ...


Wheat Variety-Specific Response To Seeding Rate Under Intensive Management Conditions In Western Kansas In 2019–2020, R. P. Lollato, B. R. Jaenisch Jan 2021

Wheat Variety-Specific Response To Seeding Rate Under Intensive Management Conditions In Western Kansas In 2019–2020, R. P. Lollato, B. R. Jaenisch

Kansas Agricultural Experiment Station Research Reports

Wheat response to seeding rate is variable and depends on resource availability during the growing season (e.g., fertility, moisture, and temperature). Our objective was to evaluate winter wheat population and grain yield responses to seeding rate and its interaction with variety in a highly-managed production system where manageable stresses were limited. One experiment evaluating the response of the wheat varieties Joe, WB-Grainfield, Langin, and LCS Revere to seeding rates ranging from 200,000 to 1,000,000 seeds per acre was established in a field managed by growers that consistently win state and national wheat yield contests near Leoti ...


Forage Accumulation Of Spring And Summer Cover Crops In Western Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom Jan 2021

Forage Accumulation Of Spring And Summer Cover Crops In Western Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom

Kansas Agricultural Experiment Station Research Reports

Intensification of no-till dryland cropping systems in western Kansas with cover crops (CCs) may provide important ecosystem services while also supplying annual forage for livestock. Two experiments were initiated in 2015 and 2016 near Brownell, KS, to determine the forage production potential of spring and summer CCs in a winter wheat-grain sorghum-fallow crop rotation. Cover crops were mechanically harvested as hayed forage to a height of 6 inches or mob-grazed with yearling heifers (weighing approximately 1000 lb each) stocked at 3 head/acre/day. Forage accumulation was determined for the hayed treatment using a small plot forage harvester, and samples ...


Foxtail Management In Smooth Brome Hay Meadows, S. R. Lancaster, S. R. Duncan Jan 2021

Foxtail Management In Smooth Brome Hay Meadows, S. R. Lancaster, S. R. Duncan

Kansas Agricultural Experiment Station Research Reports

Three different herbicides were applied at early bromegrass greenup and at post hay harvest to assess their effectiveness in controlling foxtail at two producer hay meadow sites in Pottawatomie (PT) and Dickinson (DK) counties. Pendimethalin applied early resulted in the greatest foxtail control, but control did not extend through the season to reduce late-summer infestations. Metsulfuron applied early resulted in approximately 30% visible brome injury. The injury was associated with 77 and 48% brome hay losses when compared to the untreated check, at the PT and DK sites, respectively. Injury from the early spring treatments was exacerbated by six freeze ...


Occasional Tillage In A Wheat-Sorghum-Fallow Rotation, A. Schlegel, J. Holman Jan 2021

Occasional Tillage In A Wheat-Sorghum-Fallow Rotation, A. Schlegel, J. Holman

Kansas Agricultural Experiment Station Research Reports

Beginning in 2012, research was conducted in Garden City and Tribune, KS, to determine the effect of a single tillage operation every 3 years on grain yields in a wheat-sorghum- fallow (WSF) rotation. Grain yields of wheat and grain sorghum were generally not affected by a single tillage operation every 3 years in a WSF rotation. Grain yield varied greatly by year from 2014 to 2020. Wheat yields ranged across years from mid-20s to 90 bu/a at Tribune and less than 10 to 100 bu/a at Garden City. Grain sorghum yields ranged from 40 to greater than 140 ...


Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett Jan 2021

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 with ...


Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett Jan 2021

Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett

Kansas Agricultural Experiment Station Research Reports

This study was conducted from 2008–2020 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 (NT) practices except for WF, which was grown using reduced-tillage. The efficiency of ...


Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel, A. Burnett Jan 2021

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 2020, 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 ...


2020 Kansas Summer Annual Forage Hay And Silage Variety Trial, J. D. Holman, A. Obour, S. J. Dooley, T. Roberts, S. Maxwell Jan 2021

2020 Kansas Summer Annual Forage Hay And Silage Variety Trial, J. D. Holman, A. Obour, S. J. Dooley, T. Roberts, S. Maxwell

Kansas Agricultural Experiment Station Research Reports

In 2020, 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 98 hay varieties, 78 sorghum silage varieties, and 11 dual-purpose sorghum silage varieties were evaluated.


Working With Less Water For Corn Production, A. Schlegel, F. Lamm, D. O'Brien Jan 2021

Working With Less Water For Corn Production, A. Schlegel, F. Lamm, D. O'Brien

Kansas Agricultural Experiment Station Research Reports

Research was conducted at Colby and Tribune, KS, from 2018–2020 to evaluate irrigation strategies, hybrid maturity, and seeding rate on corn production. Irrigation strategies were a combination of irrigation frequency/timing (weekly or bi-weekly) applied pre- and post-silking, and irrigation amounts (1 and 1.5 inch/week). Hybrid maturities were 108- and 111-day hybrids planted at 25,000 and 30,000 seeds/a. Average irrigation amounts ranged from 7.33 to 12.50 in. at Colby and 8.41 to 13.44 in. at Tribune. At Colby, average corn yields were not affected by irrigation strategies or seeding rate ...


Irrigated Grain Sorghum Response To Long-Term Nitrogen, Phosphorus, And Potassium Fertilization, A. Schlegel, D. Bond Jan 2021

Irrigated Grain Sorghum Response To Long-Term Nitrogen, Phosphorus, And Potassium Fertilization, A. Schlegel, D. Bond

Kansas Agricultural Experiment Station Research Reports

Long-term research shows that phosphorus (P) and nitrogen (N) fertilizer must be applied to optimize production of irrigated grain sorghum in western Kansas. In 2020, N applied alone increased yields 60 bu/a, whereas N and P applied together increased yields up to 83 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 82 bu/a. The application of 160 lb/a N (with P) produced the maximum yield in 2020, which is slightly less than the 10-year average (2011–2020). The application of potassium (K) has had no effect on sorghum ...


Testing Efficacy Of Plant Growth Regulator Products For Enhanced Winter Wheat Grain Yield And Quality, R. M. Aiken Jan 2021

Testing Efficacy Of Plant Growth Regulator Products For Enhanced Winter Wheat Grain Yield And Quality, R. M. Aiken

Kansas Agricultural Experiment Station Research Reports

Experimental plant growth regulator compounds are expected to improve wheat grain yield by extending the duration of green leaf area and altering remobilization of stored carbohydrates. In order to evaluate this, plant growth regulator materials supplied by a commercial third party were applied to Tatonka hard red winter wheat during the mid-grain fill development stage. Overall, crop productivity increased. Compared to the control treatment, two of the treatment combinations had increased grain yield (13%, machine harvest; 31%, hand harvest); increased above-ground biomass (AGB, 8%); and increased harvest index (HI, 22%). Yield components also increased, including seeds/a (21%) and seed ...


Dual-Purpose Cover Crop Effects On Soil Health In Western Kansas No-Till Dryland Cropping, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom Jan 2021

Dual-Purpose Cover Crop Effects On Soil Health In Western Kansas No-Till Dryland Cropping, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom

Kansas Agricultural Experiment Station Research Reports

Increasing interest in soil health has led producers in western Kansas to consider cover crops (CCs) for increased soil cover and improved soil properties. However, grain yield reductions following CCs in dryland cropping systems necessitate dual-purpose forage harvest to balance goals of environmental and economic sustainability. This study was initiated in 2015 near Brownell, KS, to investigate the effects of dual-purpose CC management in place of fallow on selected soil chemical and physical properties in a no-till winter wheat-grain sorghum-fallow cropping system. Mixed oat and triticale cover crops were either mechanically harvested as hayed forage to a height of 6 ...


Novel Sorghum Herbicides For Grass Control In Fallow, R. S. Currie, P. W. Geier Jan 2021

Novel Sorghum Herbicides For Grass Control In Fallow, R. S. Currie, P. W. Geier

Kansas Agricultural Experiment Station Research Reports

This study was conducted to compare herbicides for use in herbicide-tolerant grain sorghum for grass control in fallow. Imazamox applied preemergence (PRE) was generally the most effective herbicide regardless of weed species or evaluation date. Postemergence (POST) treatments did not control green foxtail more than 78% late in the season. Imazamox, Assure II (quizalofop), and Accent (nicosulfuron) applied PRE or early POST controlled shattercane and crabgrass 90% or more late in the season. Assure II applied late POST also controlled shattercane 93 to 95% late in the year.


Irrigated Corn Response To Long-Term Nitrogen And Phosphorus Fertilization, A. Schlegel, D. Bond Jan 2021

Irrigated Corn Response To Long-Term Nitrogen And Phosphorus Fertilization, A. Schlegel, D. Bond

Kansas Agricultural Experiment Station Research Reports

Long-term research shows that phosphorus (P) and nitrogen (N) fertilizer must be applied to optimize production of irrigated corn in western Kansas. In 2020, N applied alone increased yields by 85 bu/a, whereas P applied alone increased yields 10 bu/a. Nitrogen and P applied together increased yields up to 136 bu/a which is 11 bu/a less than the 10-year average of 147 bu/a. The application of 120 lb N/a (with highest P rate) produced 98% of maximum yield in 2020, which is greater than the 10-year average (2011–2020). The application of 80 instead ...


Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond Jan 2021

Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond

Kansas Agricultural Experiment Station Research Reports

A limited irrigation study involving four cropping systems and evaluating four crop rotations was initiated at the Southwest Research-Extension Center near Tribune, KS, in 2012. The cropping systems were two annual systems (continuous corn and continuous grain sorghum) and two 2-year systems (corn-grain sorghum and corn-winter wheat). In 2020, corn yields were similar for all rotations, although averaged across the past 8 years, corn yields were greater following wheat than following corn. There were no significant differences in grain sorghum yields in 2020, which was similar to the multi-year average. Wheat yields were below the multi-year average.


Comparison Of Mehlich-3 And Ammonium Acetate Extractable Calcium And Magnesium In Kansas Soils, E. B. Rutter, D. A. Ruiz Diaz, L. Hargrave Jan 2021

Comparison Of Mehlich-3 And Ammonium Acetate Extractable Calcium And Magnesium In Kansas Soils, E. B. Rutter, D. A. Ruiz Diaz, L. Hargrave

Kansas Agricultural Experiment Station Research Reports

The use of the Mehlich-3 (M3) soil test procedure to assess the plant availability of numerous macro and micronutrients has become common at soil testing labs across the US. Mehlich-3 is used for soil tests for phosphorus (P) and potassium (K) in Kansas; however, data for other base cations for existing methods are scarce for Kansas soils. The objective of this study was to investigate the relationship between M3 and ammonium acetate (AA) extractable calcium (Ca) and magnesium (Mg). Regression analyses indicate a near 1:1 linear relationship between M3-Mg and AA-Mg across a wide range of soil pH and ...


Fallow Weed Control With Vida Tank Mixtures, R. S. Currie, P. W. Geier Jan 2021

Fallow Weed Control With Vida Tank Mixtures, R. S. Currie, P. W. Geier

Kansas Agricultural Experiment Station Research Reports

The objective of the study was to compare Vida (pyraflufen) with various tank mix partners for glyphosate-resistant kochia control. Flixweed control was complete in fallow with all herbicides by 28 days after treatment. Kochia control was best when Vida was applied with glyphosate and Spartan. However, due in part to the extremely dry conditions, no treatment controlled kochia by more than 83% at 28 days after treatment, and kochia control began to decline after this 28 DAT.


Impact And Liberty Rates And Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier Jan 2021

Impact And Liberty Rates And Mixtures For Efficacy In Corn, R. S. Currie, P. W. Geier

Kansas Agricultural Experiment Station Research Reports

The objective of the study was to compare Impact (topramezone), Liberty (glufosinate) and a premixture of the two herbicides (Sinate) for efficacy in corn. Rates for each herbicide were 0.75 and 1.0 oz/a for Impact, 22 and 30 oz/a for Liberty, and 21 and 28 oz/a for Sinate. Impact and Sinate, each at the high rates, and Status plus glyphosate provided the best kochia control for corn late in the season. These treatments, along with the low rate of Impact controlled crabgrass the best. Status was also the best treatment for Russian thistle, Palmer amaranth ...