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Effect Of Defoliation At Different Stages On Grain Sorghum, K. L. Roozeboom, B. Owuoche
Effect Of Defoliation At Different Stages On Grain Sorghum, K. L. Roozeboom, B. Owuoche
Kansas Agricultural Experiment Station Research Reports
Loss of leaf area usually results in yield loss in grain crops, but the amount of yield loss varies with extent and timing of defoliation. Grass crops, such as corn and grain sorghum, are particularly sensitive to leaf area loss near the time of seed set because there is little opportunity for the plant to compensate. An experiment to quantify yield reductions associated with various levels of defoliation imposed at different stages of grain sorghum development was conducted at Manhattan, KS, in 2022. Target defoliations of 0, 33, 66, and 100% were imposed at 5-leaf, flag-leaf-appearance, half-bloom, and hard-dough stages. …
Depth Of Moist Soil At Planting Affected Grain Sorghum Response To Nitrogen Fertilizer, Augustine K. Obour, John D. Holman, Yared Assefa Mulisa
Depth Of Moist Soil At Planting Affected Grain Sorghum Response To Nitrogen Fertilizer, Augustine K. Obour, John D. Holman, Yared Assefa Mulisa
Kansas Agricultural Experiment Station Research Reports
The depth of moist soil before planting is a critical factor for grain crop production in dryland cropping systems. We investigated depth of moist soil at planting and nitrogen (N) fertilizer application effects on continuous grain sorghum yields on a Crete silt loam soil over 32 years in western Kansas. Treatments were four N rates (0, 20, 40, and 60 lb/a) in a randomized complete block design with four replications and depth of moist soil at planting determined with a Paul Brown moisture probe. Grain sorghum yield response to N fertilizer application was -0.10, 14.4, 29.3, and 36.5 lb of …
Imiflex Evaluation At Two Kansas Locations In Igrowth Grain Sorghum, P. W. Geier, R. S. Currie, S. H. Lancaster, C. M. Weber
Imiflex Evaluation At Two Kansas Locations In Igrowth Grain Sorghum, P. W. Geier, R. S. Currie, S. H. Lancaster, C. M. Weber
Kansas Agricultural Experiment Station Research Reports
Herbicide-tolerant grain sorghums, such as Igrowth (imidazolinone-resistant) hybrids were recently commercialized in Kansas. Even though the active ingredient of the herbicide associated with these systems, imazamox, is used in other crops, data are needed to define best practices for use in grain sorghum. The objective of these studies was to evaluate ImiFlex (imazamox) herbicide in Igrowth grain sorghum at two Kansas locations in 2022. ImiFlex applied postemergence provided 93% volunteer corn control, and 90 to 95% johnsongrass control regardless of application timing at Garden City. At Manhattan, ImiFlex controlled Palmer amaranth 90 to 99%. Early season grain sorghum injury was …
Wheat And Grain Sorghum Sequencing For Three Crops In Four-Year Rotations, Lucas A. Haag, Dewayne Bond, Amanda Burnett, Jeffrey Slattery, Alan Schlegel
Wheat And Grain Sorghum Sequencing For Three Crops In Four-Year Rotations, Lucas A. Haag, Dewayne Bond, Amanda Burnett, Jeffrey Slattery, Alan Schlegel
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 wheatwheat- sorghum-fallow (WWSF), wheat-sorghum-sorghum-fallow (WSSF), and continuous wheat (WW). Soil water at wheat planting averaged about 9.1 in. following sorghum, which is about 3.8 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 …
Efficacy And Crop Response With Firstact In Accase-Tolerant Grain Sorghum, Randall S. Currie, Patrick W. Geier
Efficacy And Crop Response With Firstact In Accase-Tolerant Grain Sorghum, Randall S. Currie, Patrick W. Geier
Kansas Agricultural Experiment Station Research Reports
This research was conducted to determine the efficacy of quizalofop (FirstAct) herbicide in herbicide-tolerant grain sorghum. FirstAct herbicide was evaluated for efficacy and crop response in Double Team (ACCase-tolerant) sorghum. All herbicides controlled Palmer amaranth 90% or more and volunteer corn 95% or more late in the season. Johnsongrass control was 86 to 91%. Minor sorghum injury early in the season did not persist. Sorghum receiving FirstAct late postemergence yielded more grain than the nontreated control or sorghum receiving Parallel Plus preemergence.
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, Lucas A. Haag, Amanda Burnett, Dewayne Bond, Jeffrey Slattery, Alan Schlegel
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, Lucas A. Haag, Amanda Burnett, Dewayne Bond, Jeffrey Slattery, Alan Schlegel
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-sorghumfallow (WSF) rotation. In 2022, 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 planting …
Field Evaluations Of Nitrogen-Fixing Products In Grain Sorghum, Kraig L. Roozeboom, Lucas A. Haag, Will Davis, Dorivar A. Ruiz Diaz, Charles W. Rice
Field Evaluations Of Nitrogen-Fixing Products In Grain Sorghum, Kraig L. Roozeboom, Lucas A. Haag, Will Davis, Dorivar A. Ruiz Diaz, Charles W. Rice
Kansas Agricultural Experiment Station Research Reports
Nitrogen fertilizer is one of the largest input expenses for grain crops. Biological products are currently available that contain nitrogen-fixing bacteria to supply nitrogen to a crop throughout the growing season. Pivot Bio PROVEN (developed for corn), RETURN (developed for sorghum) and experimental product versions were evaluated in grain sorghum at Manhattan, KS, in 2020, 2021, and 2022. Products were compared with an untreated check at five rates of nitrogen fertilizer. Products were applied at planting in-furrow in a volume of five gallons of water solution per acre. Crop response was characterized by several in-season parameters plus grain parameters and …
Crop Assurance Strategies For Irrigated Grain Sorghum Production, F. R. Lamm
Crop Assurance Strategies For Irrigated Grain Sorghum Production, F. R. Lamm
Kansas Agricultural Experiment Station Research Reports
This sprinkler-irrigated study was conducted from 2018 to 2021 at the Kansas State University Northwest Research-Extension Center near Colby, KS, to evaluate four different water management strategies that could provide assurance of adequateyielding grain sorghum. The grain sorghum was grown on sites with good initial soil water at planting (>70% of field capacity within the 8-ft deep silt loam profile). Strategies were 1) No seasonal irrigation; 2) Irrigation of 100% of ET minus Rain after the boot stage through remainder of season; 3) Irrigation of 100% of ET minus Rain up to a limit of 6 inches; and 4) …
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.
Spring And Summer Cover Crop Effects On Dryland Wheat And Grain Sorghum Yields In Western Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom
Spring And Summer Cover Crop Effects On Dryland Wheat And Grain Sorghum Yields In Western Kansas, L. M. Simon, A. K. Obour, J. D. Holman, S. K. Johnson, K. L. Roozeboom
Kansas Agricultural Experiment Station Research Reports
Incorporating cover crops (CC) to replace fallow in traditional dryland cropping systems in the semi-arid conditions of western Kansas has the potential to enhance soil health, suppress weeds, and increase precipitation use efficiency. The returns from haying or grazing can help cover costs of CC establishment and any reduction in yield from the subsequent grain crop. Two studies were initiated in 2015 and 2016 near Brownell, KS, to investigate dual-purpose spring and summer CC management effects on subsequent grain yields in a three-year no-till (NT) dryland winter wheat-grain sorghum-fallow cropping system. Cover crops were planted in early spring between grain …
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett
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 sorghum …
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond
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.
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
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 precipitation …
Water Use And Productivity Of Corn And Grain Sorghum In Long-Term Crop Sequences, R. M. Aiken
Water Use And Productivity Of Corn And Grain Sorghum In Long-Term Crop Sequences, R. M. Aiken
Kansas Agricultural Experiment Station Research Reports
Dryland corn and grain sorghum showed similar water productivity of grain and above-ground biomass, relative to respective growing periods, at the apparent yield frontier. The yield frontier indicates the maximum productivity for a given amount of water use. This similarity in productive response to water supply provides a foundation for improved precipitation use. Yield gaps relative to the yield frontier appear substantial. Water supply during the grain filling period was the primary driver of feed grain crop productivity, and was affected more by available soil water at pollen shed than by precipitation during grain-fill or available water at maturity. Grain …
Dryland Sorghum Nitrogen Management: Implications For Utilization As Ethanol Feedstock, K. A. Gehl, L. Haag, J. Warren, S. Sharma, P. J. Tomlinson
Dryland Sorghum Nitrogen Management: Implications For Utilization As Ethanol Feedstock, K. A. Gehl, L. Haag, J. Warren, S. Sharma, P. J. Tomlinson
Kansas Agricultural Experiment Station Research Reports
A study was initiated in 2018 to collect preliminary data to quantify nitrous oxide (N2O) emissions from dryland grain sorghum in western Kansas. Results indicate that the greatest flux of N2O occurred within the first 14 days after fertilization when plant uptake was minimal and soil moisture was elevated. During this time period, the timing and amount of rainfall was critical with respect to N2O flux. Nitrous oxide flux during the fallow phase was negligible. The cumulative emissions factor for fertilizer-derived N2O estimated for Colby (~0.3%) is well below the Intergovernmental Panel …
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
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 …
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett
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, A. Schlegel, L. Haag, A. Burnett
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 …
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, H. D. Bond
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 …
Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond
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 [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 2018, corn yields were similar for all rotations, although averaged across the past 6 years, corn yields were greater following wheat than following corn. There were no significant differences in grain sorghum yields in 2018, which was similar to the multi-year average. Wheat yields were near the …
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008–2018 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 capture …
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett
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 in. less for the second sorghum crop compared with sorghum …
Effect Of Drilled Seeding And Nitrogen Rate On Grain Sorghum Yield In Southwest Kansas, A. J. Foster, A. Schlegel, I. B. Cuvaca, J. D. Holman, I. A. Ciampitti, C. Thompson, D. Ruiz Diaz, R. Currie
Effect Of Drilled Seeding And Nitrogen Rate On Grain Sorghum Yield In Southwest Kansas, A. J. Foster, A. Schlegel, I. B. Cuvaca, J. D. Holman, I. A. Ciampitti, C. Thompson, D. Ruiz Diaz, R. Currie
Kansas Agricultural Experiment Station Research Reports
Drilled sorghum is normally done at the super-high population at row spacing between 7.5 and 10 inches, compared to rows planted at the spacing between 15 and 30 inches. Thompson (1983) growing super-thick sorghum at the Hays Research Station from 1974-1977, found that sorghum planted in narrow rows (12-18 in.) often produced higher yields than when planted in wide rows (24-40 in.). Norwood (1982) in Garden City repeated Thompson’s work and also came to the conclusion that yield of high population narrow row sorghum could exceed that of the low population-wide row when subsoil moisture and precipitation were adequate. The …
Nitrogen Application Effects On Forage Sorghum Biomass Production And Nitrates, A. Obour, J. D. Holman, D. B. Mengel
Nitrogen Application Effects On Forage Sorghum Biomass Production And Nitrates, A. Obour, J. D. Holman, D. B. Mengel
Kansas Agricultural Experiment Station Research Reports
Forage sorghum (Sorghum bicolor(L.) Moench) is a highly productive annual summer forage that can be grazed, hayed or ensiled for winter feed, confined feeding, or grazed to supplement native pasture. Recently, there has been interest in growing forage sorghum for hay or grazing in place of fallow to increase residue cover as part of an integrated forage or cover crop system. The high water use efficiency and heat and drought tolerance of sorghum makes it an ideal forage crop choice for growers in the water-limited Great Plains environment. Furthermore, due to the declining saturated thickness of the Ogallala …
Agricultural Bio-Stimulant Application To Enhance Phosphorus Availability In Grain Sorghum, A. Obour
Agricultural Bio-Stimulant Application To Enhance Phosphorus Availability In Grain Sorghum, A. Obour
Kansas Agricultural Experiment Station Research Reports
This study was conducted to determine the effectiveness of AgZyme and SuperHume (both products of Ag Concepts Corp) application on phosphorus (P) uptake and utilization efficiency in grain sorghum. Treatments were a control, 30 lb P2O5/a, 20 oz/a AgZyme, 20 oz/a AgZyme + 30 lb P2O5/a, 20 oz/a AgZyme + 30 lb P2O5/a + 6 qt/a SuperHume, which were arranged in a randomized complete block design with four replications. Preliminary results in 2016 showed grain sorghum aboveground biomass, grain moisture content, and test weight were not affected by …
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag
Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag
Kansas Agricultural Experiment Station Research Reports
This study was conducted from 2008 to 2016 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 …
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel
Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel
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 2016, available soil water at wheat and sorghum planting was greater for reduced tillage (RT) than no-tillage (NT) and least for conventional tillage (CT). Averaged across the 16-yr study, available soil water at wheat and sorghum planting was …
Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel, L. Haag
Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel, L. Haag
Kansas Agricultural Experiment Station Research Reports
A field study initiated in 2006 at the Southwest Research-Extension Center near Tribune, KS, was designed to evaluate the effects of three wheat stubble heights on subsequent grain yields of corn and grain sorghum. Corn and sorghum yields in 2016 were greater than the long-term average. When averaged from 2007 through 2016, corn grain yields were 10 bu/a greater when planted into either high or strip-cut stubble than into low-cut stubble. Average grain sorghum yields were 6 bu/a (but not significantly) greater in high-cut stubble than low-cut stubble. Similarly, water use efficiency was greater for high or strip-cut stubble for …
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. D. Holman, C. Thompson
Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. D. Holman, C. Thompson
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), wheatsorghum- 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 in. less for the second sorghum crop compared with …
Weed Control With Single Or Sequential Herbicide Applications In Acetolactase Synthase-Tolerant Grain Sorghum, R. Currie, P. Geier
Weed Control With Single Or Sequential Herbicide Applications In Acetolactase Synthase-Tolerant Grain Sorghum, R. Currie, P. Geier
Kansas Agricultural Experiment Station Research Reports
Palmer amaranth control was best when Resolve (rimsulfuron) plus Harmony GT (thifensulfuron) and Abundit Extra (glyphosate) were applied 15 days preplant followed by Zest (nicosulfuron) and atrazine postemergence, or by Zest plus atrazine alone postemergence. Palmer amaranth control was less than 80% with all other herbicide treatments. Preemergence herbicides alone provided less than 60% green foxtail control at 53 days after postemergence applications, and Zest plus atrazine alone postemergence controlled green foxtail 70%. Sequential applications of preemergence and postemergence herbicides were needed to provide the best green foxtail control. The relatively low weed control provided by these treatments may be …