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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 Jan 2020

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 Jan 2020

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 ...


Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag, A. Burnett Jan 2020

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 ...


Alternative Cropping Systems With Limited Irrigation, A. Schlegel, H. D. Bond Jan 2020

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 ...


Dryland Sorghum Nitrogen Management: Implications For Utilization As Ethanol Feedstock, K. A. Gehl, L. Haag, J. Warren, S. Sharma, P. J. Tomlinson Jan 2020

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 ...


Water Use And Productivity Of Corn And Grain Sorghum In Long-Term Crop Sequences, R. M. Aiken Jan 2020

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 ...


Alternative Cropping Systems With Limited Irrigation, A. Schlegel, D. Bond Jan 2019

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 Jan 2019

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 ...


Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. Holman, A. Burnett Jan 2019

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 ...


Nitrogen Application Effects On Forage Sorghum Biomass Production And Nitrates, A. Obour, J. D. Holman, D. B. Mengel Jan 2018

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 and ...


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 Jan 2018

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 ...


Agricultural Bio-Stimulant Application To Enhance Phosphorus Availability In Grain Sorghum, A. Obour Jun 2017

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 ...


Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel Jan 2017

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 ...


Large-Scale Dryland Cropping Systems, A. Schlegel, L. Haag Jan 2017

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 ...


Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel, L. Haag Jan 2017

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 ...


Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. D. Holman, C. Thompson Jan 2017

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 ...


Fallow Replacement Crop (Cover Crops, Annual Forages, And Short-Season Grain Crops) Effects On Wheat And Grain Sorghum Yields, J. D. Holman, T. Roberts, S. Maxwell Jan 2016

Fallow Replacement Crop (Cover Crops, Annual Forages, And Short-Season Grain Crops) Effects On Wheat And Grain Sorghum Yields, J. D. Holman, T. Roberts, S. Maxwell

Kansas Agricultural Experiment Station Research Reports

Producers are interested in growing cover crops and reducing fallow. Growing a crop during the fallow period would increase profitability if crop benefits exceeded expenses. Benefits of growing a cover crop were shown in high rainfall areas, but limited informa­tion is available on growing cover crops in place of fallow in the semiarid Great Plains. A study was done from 2007–2016 that evaluated cover crops, annual forages, and short season grain crops grown in place of fallow. In the first experiment (2007-2012) the rotation was no-till wheat-fallow, and in the second experiment (2012-2016) the rotation was no-till wheat-grain ...


Weed Control And Crop Injury With Single Or Sequential Herbicide Applications In Grain Sorghum, R. Currie, P. Geier Jan 2016

Weed Control And Crop Injury With Single Or Sequential Herbicide Applications In Grain Sorghum, R. Currie, P. Geier

Kansas Agricultural Experiment Station Research Reports

The preemergence application of Dual II Magnum (S-metolachlor) improved the over­all weed control compared to single postemergence treatments. Excessive rainfall after preemergence application compromised all treatments, producing abnormally low weed control.


Grain Sorghum Response To Water Supply And Environment, J. Broeckelman, G. J. Kluitenberg, K. Roozeboom, G. Cramer, Eric Adee, A. Schlegel, J. D. Holman, I. A. Ciampitti Jan 2016

Grain Sorghum Response To Water Supply And Environment, J. Broeckelman, G. J. Kluitenberg, K. Roozeboom, G. Cramer, Eric Adee, A. Schlegel, J. D. Holman, I. A. Ciampitti

Kansas Agricultural Experiment Station Research Reports

Three grain sorghum hybrids were selected to compare under different water supply scenarios across Kansas. The environments ranged from dryland in western Kansas to dryland and irrigated in central and eastern Kansas. The three hybrids that were selected represent different sorghum genotypes used commercially. Looking at two situations from higher and lower yielding environments, hybrids 1 and 3 had different strategies to attain final yields. In the higher yielding environment, both grain harvest index (HI, expressed as the dry weight ratio of grain yield to plant biomass at maturity) and biomass were maximized for hybrid 1 and hybrid 2. In ...


Evaluating The Effectiveness Of Iron Chelates In Managing Iron Deficiency Chlorosis In Grain Sorghum, A. Obour, A. Schlegel, R. Perumal, D. Ruiz Diaz Jan 2016

Evaluating The Effectiveness Of Iron Chelates In Managing Iron Deficiency Chlorosis In Grain Sorghum, A. Obour, A. Schlegel, R. Perumal, D. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Grain sorghum production in alkaline or calcareous soils is frequently affected by iron (Fe) chlorosis. Soil conditions such as high pH, high free calcium carbonate (lime), and low organic matter favor development of Fe deficiency chlorosis (IDC), which can delay crop maturity and reduce yields. Field experiments were conducted in the summer of 2014 and 2015 to determine the effectiveness of Fe chelate application in alleviating IDC in grain sorghum. Treatments were four Fe chelate application rates (0, 3, 6, and 9 lb product/a) applied either in-furrow with the seed at the time of planting or 2 weeks after ...


Grain Sorghum Response To Band Applied Zinc Fertilizer, A. Tonon Rosa, N. O. Nelson, D. Ruiz Diaz Jan 2016

Grain Sorghum Response To Band Applied Zinc Fertilizer, A. Tonon Rosa, N. O. Nelson, D. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Zinc (Zn) is one of the micronutrients found to be deficient in Kansas. The objective of this study was to evaluate the response of grain sorghum to Zn fertilization using strip trials. The experiment was set up in Manhattan, KS, in 2015. The experimental design consisted of two strips, one with Zn fertilizer and the other without, with five replications. Zn fertilizer was applied as starter in combination with ammonium polyphosphate at the rate of 0.5 lb Zn/a. Plant tissue samples were collected to determine Zn content. Grain yield was recorded by combine equipped with yield monitor. No ...


Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel Jan 2016

Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel

Kansas Agricultural Experiment Station Research Reports

A field study initiated in 2006 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 2015 were greater than the long-term average. When averaged from 2007 through 2015, 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 greater in high-cut stubble than low-cut stubble. Similarly, water use efficiency was greater for high or strip-cut stubble for corn and high-cut stubble for grain sorghum. Harvesting wheat ...


Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. D. Holman, C. Thompson Jan 2016

Wheat And Grain Sorghum In Four-Year Rotations, A. Schlegel, J. D. Holman, C. Thompson

Kansas Agricultural Experiment Station Research Reports

Research on 4-year crop rotations with wheat and grain sorghum was initiated at the Southwest Research-Extension Center near Tribune, Kansas, in 1996. 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 following wheat. Grain yield of recrop wheat averaged about 80% of the yield of wheat following sorghum. Grain yield of ...


Alternative Cropping Systems With Limited Irrigation, A. Schlegel Jan 2016

Alternative Cropping Systems With Limited Irrigation, A. Schlegel

Kansas Agricultural Experiment Station Research Reports

A limited irrigation study involving six cropping systems 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 four 2-year systems (corn-sorghum [C-GS]), corn-sunflower [C-SF], corn-winter wheat [C-W], and corn-wheat/double sunflower [C-W/SF]). In 2015, corn yields were lower following corn than other crops while wheat and grain sorghum yields were similar for all rotations. This tended to agree with the 3-year average yields except for average sorghum yields being higher following corn than sorghum. Sunflowers were destroyed by rodents and ...


Weed Control With Single Or Sequential Herbicide Applications In Acetolactase Synthase-Tolerant Grain Sorghum, R. Currie, P. Geier Jan 2016

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 ...


Preemergence Weed Control With Fultime Nxt And Competitive Standards In Grain Sorghum, R. Currie, P. Geier Jan 2016

Preemergence Weed Control With Fultime Nxt And Competitive Standards In Grain Sorghum, R. Currie, P. Geier

Kansas Agricultural Experiment Station Research Reports

At 71 days after treatment, FulTime NXT (acetochlor + atrazine) at 2.5 or 3.0 qt/a and Lumax EZ (S-metolachlor + atrazine + mesotrione) at 2.0 qt/a were the only treatments to control Palmer amaranth at 90% or more. All treatments provided similar velvetleaf control. Green foxtail control was 75 to 83% with all rates of FulTime NXT or Lumax EZ. Sorghum receiving FulTime NXT at 2.5 or 3.0 qt/a or Lumax EZ yielded significantly more than the control treatments.


Evaluating The Effectiveness Of Iron Chelates In Managing Iron Deficiency Chlorosis In Grain Sorghum, A. Obour, R. Perumal Jan 2015

Evaluating The Effectiveness Of Iron Chelates In Managing Iron Deficiency Chlorosis In Grain Sorghum, A. Obour, R. Perumal

Kansas Agricultural Experiment Station Research Reports

Grain sorghum production in alkaline or calcareous soils is frequently affected by iron (Fe) chlorosis. Soil conditions such as high pH, high free calcium carbonate (lime), and low organic matter favor development of iron deficiency chlorosis (IDC), which can delay crop maturity and reduce yields. Two field experiments were conducted in the summer of 2014 to determine the effectiveness of Fe chelate application in alleviating IDC in grain sorghum. Treatments in the first study were four Fe chelate application rates (0, 3, 6, and 9 lb/a) applied either in-furrow with the seed at the time of planting or 2 ...


Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel Jan 2015

Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel

Kansas Agricultural Experiment Station Research Reports

A field study initiated in 2006 was designed to evaluate the effects of three wheat stubble heights on subsequent grain yields of corn and grain sorghum. Corn yields in 2014 were similar to the long-term average, while sorghum yields were greater than the long-term average. Taller cut stubble in 2014 increased biomass production of corn and yield for grain sorghum. When averaged across 2007 through 2014, corn grain yields were 9 bu/a greater when planted into either tall or strip-cut stubble than into low-cut stubble. Average grain sorghum yields were not significantly affected by wheat stubble height. Water use ...


Nitrogen And Phosphorus Fertilization Of Irrigated Grain Sorghum, A. Schlegel, H. D. Bond Jan 2015

Nitrogen And Phosphorus Fertilization Of Irrigated Grain Sorghum, A. Schlegel, H. D. Bond

Kansas Agricultural Experiment Station Research Reports

(Abstract only. Link to: http://newprairiepress.org/kaesrr/vol1/iss3/6/) Article is nearly identical to
Long-Term Nitrogen and Phosphorus Fertilization of Irrigated Grain Sorghum, previously published in Kansas Fertilizer Research 2015, included in this PDF.

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 2014, N applied alone increased yields 49 bu/a, whereas N and P applied together increased yields up to 81 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 73 bu/a ...


Weed Control And Crop Tolerance In Inzen Grain Sorghum With Zest Tank Mixtures, R. Currie, P. Geier Jan 2015

Weed Control And Crop Tolerance In Inzen Grain Sorghum With Zest Tank Mixtures, R. Currie, P. Geier

Kansas Agricultural Experiment Station Research Reports

Although preemergence applications of Cinch ATZ provided excellent green foxtail control, it did not provide commercially acceptable levels of Palmer amaranth or crabgrass control. All postemergence tank mixes of Zest raised the level of control achieved by the preemergence applications of Cinch ATZ to excellent levels for these species. With the exception of the Huskie tank mix, which provided excellent Palmer amaranth control, all other postemergence programs provided only adequate control of Palmer amaranth, crabgrass, or green foxtail. Weed pressure of these species was extreme. Under conditions of extreme weed pressure, a foundation treatment of Cinch ATZ followed by a ...