Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 35

Full-Text Articles in Life Sciences

Assessing Corn Response To Cover Crops And Nitrogen Fertilization In A No-Till, Three-Year Rotation In Northeast Kansas, Jessica GrüNberg, Alexis Correira, Kraig L. Roozeboom, Deann R. Presley, Peter J. Tomlinson Jan 2023

Assessing Corn Response To Cover Crops And Nitrogen Fertilization In A No-Till, Three-Year Rotation In Northeast Kansas, Jessica GrüNberg, Alexis Correira, Kraig L. Roozeboom, Deann R. Presley, Peter J. Tomlinson

Kansas Agricultural Experiment Station Research Reports

A long-term cover crop experiment was established in 2007 at Ashland Bottoms near Manhattan, KS, to determine the effect of cover crops and nitrogen (N) rates on subse­quent corn growth and yield in a wheat-corn-soybean rotation. Treatments included chemical fallow, double crop soybean, different cover crops (cereal rye,crimson clover, a mix of cereal rye and crimson clover, and a diverse mix of seven species) planted in late summer after wheat harvest, and five N rates (0, 40, 80, 160, and 240 lb/acre) applied to the subsequent corn crop. Yield responded differently to N rate depending on cover crop …


Occasional Tillage In A Wheat-Sorghum-Fallow Rotation: 2022 Growing Season, John D. Holman, Augustine K. Obour, Lucas A. Haag, Mikaela A. Lawrence Jan 2023

Occasional Tillage In A Wheat-Sorghum-Fallow Rotation: 2022 Growing Season, John D. Holman, Augustine K. Obour, Lucas A. Haag, Mikaela A. Lawrence

Kansas Agricultural Experiment Station Research Reports

Beginning in 2012, research was conducted near 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. Treatments included no-till, single tillage post wheat harvest in mid-August, and single tillage mid-June during the fallow phase. This study was revised with two additional more intensive tillage treatments since 2019. The two additional treatments were 1) two tillage operations during the fallow phase and 2) one tillage during fallow phase and one tillage post wheat harvest. Grain yield varied greatly by year and location. Wheat yields ranged …


Wheat And Grain Sorghum Sequencing For Three Crops In Four-Year Rotations, Lucas A. Haag, Dewayne Bond, Amanda Burnett, Jeffrey Slattery, Alan Schlegel Jan 2023

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 …


Planting Green: Potential Benefits And Disadvantages Of Planting Corn Into Live Cereal Rye Cover Crop, A. Correira, P. Tomlinson, D. Presley Jan 2023

Planting Green: Potential Benefits And Disadvantages Of Planting Corn Into Live Cereal Rye Cover Crop, A. Correira, P. Tomlinson, D. Presley

Kansas Agricultural Experiment Station Research Reports

Although cover crops are typically terminated 2–4 weeks prior to cash crop planting, there may be situations where late-burndown or planting into a living cover crop (planting green) may be necessary or even beneficial. This experiment investigated the effect of cover crop termination date on corn (Zea mays) yield and the presence of beneficial insects. Three different termination dates were tested: 4 weeks prior to planting (brown), 7 to 14 days prior to planting (green-brown), and at planting (green), as well as a check treatment with no cover crop planted. The site year by termination date interaction was …


Kansas Field Research 2022 Jan 2022

Kansas Field Research 2022

Kansas Agricultural Experiment Station Research Reports

A summary of research conducted in 2020-2022 on field production 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/


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 sorghum …


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 precipitation …


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 …


Kansas Field Research 2021 Jan 2021

Kansas Field Research 2021

Kansas Agricultural Experiment Station Research Reports

A summary of research conducted in 2019-2020 on field production and management practices for crops in Kansas. Published in 2021 from the Kansas State University Agricultural Experiment Station and Cooperative Extension Service https://www.ag.k-state.edu/


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 bu/a, depending …


Long-Term Effect Of Tillage Practices And Nitrogen Fertilization On Corn Yield, Carlos A. Bonini Pires, Marcos M. Sarto, James S. Lin, William G. Davis, Charles Rice Jan 2020

Long-Term Effect Of Tillage Practices And Nitrogen Fertilization On Corn Yield, Carlos A. Bonini Pires, Marcos M. Sarto, James S. Lin, William G. Davis, Charles Rice

Kansas Agricultural Experiment Station Research Reports

The objective of this study was to investigate the effect of different tillage systems and nitrogen (N) fertilizers on corn yield. Higher corn yields (207 bu/a and 203 bu/a) were found under no-tillage + high (150 lb N/a) manure application, and tillage + super high manure (750 lb N/a), respectively. The trend observed for the different nitrogen fertilizers between tillage systems was the same. However, a greater corn yield was observed under no-till in comparison to tilled conditions for both high fertilizer and high manure. No-till improves soil water infiltration, aggregation, nutrient cycling, and may increase crop yield. On other …


Occasional Tillage In A Wheat-Sorghum-Fallow Rotation, A. Schlegel, J. Holman Jan 2020

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 2019. Wheat yields ranged across years from mid-20s to 90 bu/a at Tribune and less than 10 to near 100 bu/a at Garden City. Grain sorghum yields ranged from 40 to greater than 140 bu/a, depending …


Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On No-Till Corn Grown On A Claypan Soil, D. W. Sweeney, D. Ruiz Diaz Jan 2020

Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On No-Till Corn Grown On A Claypan Soil, D. W. Sweeney, D. Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Average corn yield in 2019 was increased by 14 bu/a with knife application of pre-plant nitrogen (N) fertilizer compared with broadcast application. Applying N more than doubled yield of corn grown without N. In general, applying side-dress N increased yields compared to yields obtained with only pre-plant applications.


Soil Microbial Seasonal Community Dynamics In Response To Cover Crop And Phosphorus Fertilizer Usage In A No-Till Corn-Soybean System In 2018, C. L. Stewart, L. M. Starr, N. O. Nelson, K. L. Roozeboom, G. J. Kluitenberg, D. R. Presley, P. J. Tomlinson Jan 2020

Soil Microbial Seasonal Community Dynamics In Response To Cover Crop And Phosphorus Fertilizer Usage In A No-Till Corn-Soybean System In 2018, C. L. Stewart, L. M. Starr, N. O. Nelson, K. L. Roozeboom, G. J. Kluitenberg, D. R. Presley, P. J. Tomlinson

Kansas Agricultural Experiment Station Research Reports

This study examined microorganism community composition in plots managed with and without cover crops and three contrasting phosphorous (P) fertilizer manage­ment techniques in a no-till corn-soybean system. This work was performed in the spring and fall of 2018 at the Kansas Agricultural Watershed Field Laboratory (KAW), Manhattan, KS. The study design was a 2 × 3 complete block factorial design with three replications, with cover crop presence or absence and three levels of P fertilizer management (control, fall broadcast, and spring injected). To examine microorganism community composition, phospholipid fatty acid (PLFA) analysis was used. Only the main effect of cover …


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 to sorghum …


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 precipitation …


Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel, A. Burnett Jan 2020

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

Kansas Agricultural Experiment Station Research Reports

This study was initiated in 1991 at the Kansas State University Southwest Research- Extension Center near Tribune, KS. The purpose of the study was to identify the effects of tillage intensity on precipitation capture, soil water storage, and grain yield in a wheat-sorghum-fallow rotation. Grain yields of wheat and grain sorghum increased with decreased tillage intensity in a wheat-sorghum-fallow (WSF) rotation. In 2019, available soil water at sorghum planting was greater for no-tillage (NT) than reduced tillage (RT) which was greater than conventional tillage (CT). For wheat there was a similar pattern as sorghum, with available soil water at wheat …


Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage, E. A. Adee Jan 2019

Tillage Study For Corn And Soybeans: Comparing Vertical, Deep, And No-Tillage, E. A. Adee

Kansas Agricultural Experiment Station Research Reports

Trends from a tillage study conducted since 2011 have shown no clear differences between tillage systems for either corn or soybeans in lighter soils under irrigation. One out of seven years has shown a yield advantage for either corn or soybeans for any tillage system, which appears to be related to environmental conditions experienced during the season.


Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney, D. Ruiz-Diaz Jan 2019

Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney, D. Ruiz-Diaz

Kansas Agricultural Experiment Station Research Reports

In 2018, adding nitrogen (N) greatly improved average wheat yields with about a 10% increase with knife compared to broadcast application methods. Even though tillage did not affect wheat yields, soybean yield was about 10% greater with no-till.


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 capture …


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 …


Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On Corn Grown No-Till On A Claypan Soil, D. W. Sweeney, D. Ruiz-Diaz Jan 2019

Pre-Plant Nitrogen Rate And Application Method And Side-Dress Nitrogen Rate Effects On Corn Grown No-Till On A Claypan Soil, D. W. Sweeney, D. Ruiz-Diaz

Kansas Agricultural Experiment Station Research Reports

Corn yield in 2018 was increased by about 5 bu/a with knife application of pre-plant nitrogen (N) fertilizer compared with broadcast application. Fertilizing with increasing rates of N applied pre-plant, at side-dress, or both had little effect on yield or yield components of corn in 2018.


Tillage Intensity In A Long-Term Wheat-Sorghum-Fallow Rotation, A. Schlegel, A. Burnett Jan 2019

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 2018, 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 …


Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney, Dorivar Ruiz Diaz Jan 2018

Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney, Dorivar Ruiz Diaz

Kansas Agricultural Experiment Station Research Reports

Many crop rotation systems are used in southeastern Kansas. This experiment was designed to determine the long-term effect of selected tillage and N fertilizer placement options on yields of short-season corn, wheat, and double-crop soybean in a rotation.


Corn Grain Yield Trends From 2012 To 2016: A 26-Year Long-Term Experiment, J. Rivera-Zayas, Charles Rice Jun 2017

Corn Grain Yield Trends From 2012 To 2016: A 26-Year Long-Term Experiment, J. Rivera-Zayas, Charles Rice

Kansas Agricultural Experiment Station Research Reports

Long-term research trials provide an understanding of long-term effects on crop production. This long-term research studied the effect of conventional tillage (CT) and no-tillage (NT) systems. Factors of this 22-year study of corn (Zea maysL.) production also included the application of nitrogen (N) in the forms of ammonium nitrate and manure at rates of 150 lb/N/a. Corn grain yield trends during 2012 to 2016 were affected by the interaction between N source and year (P<0.05). The interaction between tillage practices and N source and the overall interaction between the last 5 years did not yield performance (P>0.05). Under the studied conditions the 75 lb/N/a as N fertilizer or manure achieved high corn yields.


Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup Jan 2017

Timing Of Side-Dress Applications Of Nitrogen For Corn In Conventional And No-Till Systems, D. W. Sweeney, D. E. Shoup

Kansas Agricultural Experiment Station Research Reports

Corn yields were affected by tillage and nitrogen (N) side-dress options in 2016. Corn yields were 12% greater with conventional tillage than with no-till. Side-dress applications of N at V10 resulted in greater corn yield than side-dress N applications at V6.


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 …


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 …


Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/ Double-Crop Soybean Rotation, D. W. Sweeney Jan 2017

Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/ Double-Crop Soybean Rotation, D. W. Sweeney

Kansas Agricultural Experiment Station Research Reports

In 2016, adding nitrogen (N) greatly improved average wheat yields, but the response to tillage and different N placement methods was minimal. Double-crop soybean yields were unaffected by tillage or the residual from N treatments that were applied to the previous wheat crop.


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 …