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Articles 1 - 30 of 156
Full-Text Articles in Life Sciences
Dietary Chromium Propionate Combined With Yeast Minimally Affects Growth Performance And Carcass Traits Of Finishing Steers, C. L. Van Bibber, J. E. Axman, J. M. Gonzalez, J. S. Drouillard
Dietary Chromium Propionate Combined With Yeast Minimally Affects Growth Performance And Carcass Traits Of Finishing Steers, C. L. Van Bibber, J. E. Axman, J. M. Gonzalez, J. S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Chromium (Cr) is an essential micromineral that serves to increase absorption of glucose from blood by potentiating the action of insulin. The ability to increase glucose tolerance could lead to more efficient use of glucose and ultimately to improved growth and efficiency. In addition, Cr may be beneficial in improving the immune response of cattle that are subjected to periods of stress. Organic forms of Cr (i.e., Cr propionate) increase absorption and are more physiologically active than their inorganic counterparts. Chromium propionate is currently the only approved form of organic Cr allowed for supplementation in cattle diets in the United …
Effects Of Growth-Promoting Technologies On Muscle Structural Characteristics And Meat Tenderness, S. M. Ebarb, J. S. Drouillard, K. J. Phelps, J. A. Noel, M. A. Vaughn, D. D. Burnett, J. M. Gonzalez
Effects Of Growth-Promoting Technologies On Muscle Structural Characteristics And Meat Tenderness, S. M. Ebarb, J. S. Drouillard, K. J. Phelps, J. A. Noel, M. A. Vaughn, D. D. Burnett, J. M. Gonzalez
Kansas Agricultural Experiment Station Research Reports
Skeletal muscle tissue consists of two main structures that elicit strong influences on cooked meat tenderness: myofibrillar and connective tissues. The myofibrillar component consists of contractile and cytoskeletal proteins that aid in muscle contraction and support. A large portion of meat science literature documents the effects that postmortem aging elicits in terms of weakening the myofibrillar component to improve tenderness. Connective tissue is primarily comprised of collagen, the most abundant protein within the body. The function of this tissue is to support the myofibrillar component and transfer the force of contraction. Collagen, characterized by its solubility, is most commonly identified …
Effects Of Postmortem Aging Time And Muscle Location On Objective Measures Of Semitendinosus Steak Tenderness, M. B. Da Silva, L. D. F. Miranda, K. J. Phelps, S. M. Ebarb, C. L. Van Bibber, T. G. O'Quinn, J. S. Drouillard, J. M. Gonzalez
Effects Of Postmortem Aging Time And Muscle Location On Objective Measures Of Semitendinosus Steak Tenderness, M. B. Da Silva, L. D. F. Miranda, K. J. Phelps, S. M. Ebarb, C. L. Van Bibber, T. G. O'Quinn, J. S. Drouillard, J. M. Gonzalez
Kansas Agricultural Experiment Station Research Reports
Beef tenderness is the most important trait affecting consumer beef eating satisfaction. Cuts from muscles with superior tenderness (tenderloin, ribeye, striploin) are consequently most highly valued, but because of recent record-high beef prices, the need to identify more economical cuts that will meet consumer expectations for tenderness is greater than ever. The eye of round (Semitendinosus) has traditionally been marketed as a lower-value cut, primarily owing to its inherent toughness. Tenderness improves throughout postmortem aging and continues to improve in muscles aged for greater than 35 days. Retail steaks from the Semitendinosus receive, on average, 17 days of …
Evaluation Of The Productivity Of A Single Subcutaneous Injection Of Longrange In Stocker Calves Compared With A Positive (Dectomax) And A Negative (Saline) Control, A. C. Vesco, A. K. Sexten, C. S. Weibert, B. E. Oleen, W. R. Hollenbeck, L C. Grimes, Dale Blasi
Evaluation Of The Productivity Of A Single Subcutaneous Injection Of Longrange In Stocker Calves Compared With A Positive (Dectomax) And A Negative (Saline) Control, A. C. Vesco, A. K. Sexten, C. S. Weibert, B. E. Oleen, W. R. Hollenbeck, L C. Grimes, Dale Blasi
Kansas Agricultural Experiment Station Research Reports
Subclinical parasitism is commonly observed in stocker cattle. Treatment of internal parasites helps to improve weight gains, feed conversion, and immune status and decreases morbidity and mortality of beef cattle (Hawkins, 1993). Some of the most concerning classes of internal parasites include Cooperia, Haemonchus, and Ostertagia. Commonly used anthelmintics come in the form of pour-ons, oral drenches, and subcutaneous injections. A majority of these drugs are designed to be administered in a single dose and provide defense against stomach worms for approximately 14 to 42 days, but the typical grazing season lasts for approximately 120 days. For …
Value And Use Of Artificial Insemination By Beef Producers, S. K. Johnson, Garland R. Dahlke
Value And Use Of Artificial Insemination By Beef Producers, S. K. Johnson, Garland R. Dahlke
Kansas Agricultural Experiment Station Research Reports
Artificial insemination and estrous synchronization remain underutilized by U.S. beef producers. The most recent National Animal Health Monitoring Survey (NAHMS 2007–08) reported that 7.6% of producers used artificial insemination and 7.9% used estrous synchronization. The most common reason cited for not using these reproductive technologies was time and labor, followed by cost and difficulty. Little information is available on actual management practices used by producers who do use these technologies and their value to such operations.
Genetic Improvement Made Through Dna Testing And Artificial Insemination To High- Growth, High Carcass Value Angus Sires, L C. Grimes, L. R. Corah, T. Brink, M. R. Gardiner, A. K. Sexten
Genetic Improvement Made Through Dna Testing And Artificial Insemination To High- Growth, High Carcass Value Angus Sires, L C. Grimes, L. R. Corah, T. Brink, M. R. Gardiner, A. K. Sexten
Kansas Agricultural Experiment Station Research Reports
The beef industry has improved the recording of pedigrees and performance data through the use of breed associations and herd health databases. Constant evaluation of genetics and performance has allowed producers to make more informed breeding decisions that help improve herd productivity. As a result of recent droughts and elevated feed and grain prices, however, the American beef cowherd is at a record-low 29 million head. For the United States to continue to be the leading producer of beef in the world, the industry must adopt technologies that improve efficiency of the cowherd and the quality of beef being produced. …
Using Estrus-Detection Patches To Vary Time Of Insemination Improves Pregnancy Rates Compared With One Single Timed Insemination, S. L. Hill, D. M. Grieger, K C. Olson, J. R. Jaeger, J. S. Stevenson
Using Estrus-Detection Patches To Vary Time Of Insemination Improves Pregnancy Rates Compared With One Single Timed Insemination, S. L. Hill, D. M. Grieger, K C. Olson, J. R. Jaeger, J. S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Timed artificial insemination (TAI) of beef cows at a predetermined time is a management tool that reduces labor costs associated with conventional heat detection before insemination. Multiple research trials have examined timing of the individual components of the developed protocols associated with TAI. The 7-day CO-Synch + progesterone insert (controlled internal drug release; CIDR) protocol has been shown to initiate ovulation effectively in cycling and noncycling suckled beef cows, often producing pregnancy rates greater than 50% in beef cows. In the current research, we examined using two targeted insemination intervals depending on the occurrence of estrus. We hypothesized that by …
Supplemental Zinc Oxide Does Not Interact With Zilmax In Feedlot Steers, C. L. Van Bibber, K. A. Miller, J. M. Gonzalez, J. S. Drouillard
Supplemental Zinc Oxide Does Not Interact With Zilmax In Feedlot Steers, C. L. Van Bibber, K. A. Miller, J. M. Gonzalez, J. S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Zilmax (Merck Animal Health; Summit, NJ) is in a class of feed additives known as beta agonists and is designed to improve production efficiency in cattle when fed 20 days prior to harvest. Zilmax works by altering deposition of body tissue to more lean muscle than fat. Zinc is an essential mineral necessary for normal growth and development of all mammals. Zinc functions largely in enzymes involved in protein synthesis and carbohydrate metabolism along with many other biological reactions. The purpose of this study was to assess changes in blood components and to evaluate the interactive effects of zinc and …
Menthol Supplementation Has Minimal Effects On Blood Components From Holstein Steers, C. L. Van Bibber, K. A. Miller, C. C. Aperce, C. Alvarado, J. J. Higgins, J. S. Drouillard
Menthol Supplementation Has Minimal Effects On Blood Components From Holstein Steers, C. L. Van Bibber, K. A. Miller, C. C. Aperce, C. Alvarado, J. J. Higgins, J. S. Drouillard
Kansas Agricultural Experiment Station Research Reports
Menthol is a naturally occurring compound classified as an essential oil that gives plants of the Mentha species their characteristic minty aroma and flavor. Menthol is used as a cooling compound in products ranging from common cold medications to pesticides and has been found to have a wide range of biological activities in different systems within the body. More recently, menthol and other essential oils have been identified as potential alternatives to feed antibiotics and growth promotants. Menthol has been observed to directly affect κ-opioid receptors. Kappa opioid receptors are located in the central nervous system, with a high density …
East Central Kansas Experiment Field Introduction, E. A. Adee
East Central Kansas Experiment Field Introduction, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
The research program at the East Central Kansas Experiment Field is designed to keep area crop producers abreast of technological advances in agronomic agriculture. Specific objectives are to (1) identify top-performing varieties and hybrids of wheat, corn, soybean, and grain sorghum; (2) establish the amount of tillage and crop residue cover needed for optimum crop production; (3) evaluate weed and disease control practices using chemical, no chemical, and combination methods; and (4) test fertilizer rates, timing, and application methods for agronomic proficiency and environmental stewardship.
Forage Sorghum Performance Trial, J. L. Moyer, E. A. Adee
Forage Sorghum Performance Trial, J. L. Moyer, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
In our sorghum trials, production of forage was greater (P < 0.05) for ‘FS 4’ and ‘AF 7401’ than for ‘AF 7202,’ possibly related to differences in maturity. Estimated grain production was greater for ‘AF 7401’ than for all others, except for ‘AF 7102.’
Grain Sorghum Yield Response To Water Availability, J. P. Broeckelman, E. A. Adee, G. J. Kluitenberg, I. A. Ciampitti
Grain Sorghum Yield Response To Water Availability, J. P. Broeckelman, E. A. Adee, G. J. Kluitenberg, I. A. Ciampitti
Kansas Agricultural Experiment Station Research Reports
Yield effects of irrigation on sorghum and corn were compared, but this report is merely focused on the sorghum phase of the crop rotation. Mean yield for irrigated sorghum was 168 bu/a, whereas dryland yield was 145 bu/a. The latter represents a yield improvement of 24 bu/a, an increase of approximately 2 bu/a per unit (in.) of water applied (considering a total of 11 in. of water applied in the irrigation block).
The irrigated sorghum used a mean of 7.8 in. more water than the dryland, which suggests that the dryland sorghum consumed 3.4 in. more water from the soil …
Tillage Study For Corn And Soybean: Comparing Vertical, Deep, And No-Till, E. A. Adee
Tillage Study For Corn And Soybean: Comparing Vertical, Deep, And No-Till, E. A. Adee
Kansas Agricultural Experiment Station Research Reports
The need for tillage in corn and soybean production in the Kansas River Valley continues to be debated. The soils of the Kansas River Valley are highly variable, with much of the soil sandy to silty loam in texture. These soils tend to be relatively low in organic matter (<2%) and susceptible to wind erosion. Although typically well drained, these soils can develop compaction layers under certain conditions. A tillage study was initiated in the fall of 2011 at the Kansas River Valley Experiment Field near Topeka to compare deep vs. shallow vs. no-till vs. deep tillage in alternate years. Corn and soybean crops are rotated annually. This is intended to be a long-term study to determine if soil characteristics and yields change in response to a history of each tillage system.
Seeding Date Effects On Camelina Seed Yield And Quality Traits, E. Obeng, A. Obour
Seeding Date Effects On Camelina Seed Yield And Quality Traits, E. Obeng, A. Obour
Kansas Agricultural Experiment Station Research Reports
Identifying crops that are adapted to dryland environments of the central and northern Great Plains (GP) has been a major challenge. An alternative crop with potential for dryland crop production in the GP is camelina (Camelina sativa L. Crantz). Time of planting is an important management consideration that can affect camelina production. Early planting allows camelina to mature before the onset of hot summer temperatures in the central GP that can affect seed yield. A study was carried out in the spring of 2013 and 2014 to evaluate planting date effects on spring camelina varieties grown under dryland conditions …
Influence Of Different Seeding Dates On Fenugreek (Trigonella Foenum-Graecum L.) Forage Yield And Nutritive Value, A. Obour, E. Obeng, J. D. Holman
Influence Of Different Seeding Dates On Fenugreek (Trigonella Foenum-Graecum L.) Forage Yield And Nutritive Value, A. Obour, E. Obeng, J. D. Holman
Kansas Agricultural Experiment Station Research Reports
Fenugreek (Trigonella foenum-graecum L.) is used as medicinal plant in many Asian countries and has been reported to have forage quality similar to alfalfa. Fenugreek is an annual crop and may have the potential to diversify forage production systems in the central High Plains. This study evaluated forage dry matter (DM) production and the nutritive value of three fenugreek cultivars as influenced by planting date at Hays and Garden City, KS, in 2014. Results at Hays showed forage DM yield of fenugreek cultivars was not affected by planting date, but fenugreek cultivars differed significantly (P < 0.05) in forage DM yield. Averaged across planting date, forage DM production was 760 lb/a for ‘Amber,’ 910 lb/a for ‘F96,’ and 672 lb/a for ‘Tristar.’ Forage crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), total digestible nutrient (TDN) concentrations, and relative feed value (RFV) did not differ (P > 0.05) …
Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer
Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer
Kansas Agricultural Experiment Station Research Reports
First-year spring yields of tall fescue in 2013 responded to phosphorus (P) fertilization, but lodging at the R5 growth stage in the spring with higher P fertilization rates may have influenced subsequent fall harvest yields, which declined with increasing P rates. As N rates increased, R5 yields declined but fall harvest yields increased.
Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney
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 2013, late planting resulted in corn yields that were less than 100 bu/a. Nitrogen (N) placement did not affect yields in the higher-yielding conventional tillage system, but knifing tended to result in greater yield in reduced and no-till systems.
Corn Response To Foliar-Applied Zinc Fertilizers, A. Lamb, N. O. Nelson
Corn Response To Foliar-Applied Zinc Fertilizers, A. Lamb, N. O. Nelson
Kansas Agricultural Experiment Station Research Reports
This study was conducted to determine corn response to three foliar-applied zinc sources. The study was conducted on dryland corn in Manhattan, KS, during the 2014 growing season. Yields were low as a result of very low precipitation during pollination and grain fill. There was no yield response to foliar-applied Zn; however, grain analysis show significant increases in grain Zn concentration from foliar-applied Zn. Foliar-applied Zn products are effective for increasing Zn uptake in corn. Additional studies need to be conducted to determine the yield response.
Fertilizer Placement And Tillage Interaction In Corn And Soybean Production, A. T. Rosa, D. A. Ruiz Diaz
Fertilizer Placement And Tillage Interaction In Corn And Soybean Production, A. T. Rosa, D. A. Ruiz Diaz
Kansas Agricultural Experiment Station Research Reports
Different tillage systems can affect the availability of phosphorus (P) by changing the soil environment. The objective of this study was to evaluate the effects and interaction of fertilizer placement, tillage, and varieties for soybean and corn. The experiment was established at two locations in Kansas in 2014. The experimental design was a factorial in a randomized complete block with four replications. Three fertilizer treatments were combined with two tillage systems and two varieties of soybean and corn selected based on contrasting root systems. Plant tissue samples were collected during the vegetative and reproductive stages to evaluate P concentration, P …
Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer
Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer
Kansas Agricultural Experiment Station Research Reports
First-year production of tall fescue (Site 1 in 2013 and Site 2 in 2014) was affected by nitrogen (N) and phosphorus (P) but not potassium (K) fertilization. Environmental conditions likely influenced the growth of the fescue and the response to fertilizer N and P in the first year of production at the two sites.
Tillage And Nitrogen Placement Effects On Yields In A Short-Season Corn/Wheat/Double-Crop Soybean Rotation, D. W. Sweeney
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
Overall in 2014, adding nitrogen (N) improved average wheat yields, but different N placement methods resulted in similar yields. Double-crop soybean yields were unaffected by tillage or the residual from N treatments that were applied to the previous wheat crop.
Identification Of Yield-Limiting Factors In Southeast Kansas Cropping Systems, G. F. Sassenrath, X. Lin, D. E. Shoup
Identification Of Yield-Limiting Factors In Southeast Kansas Cropping Systems, G. F. Sassenrath, X. Lin, D. E. Shoup
Kansas Agricultural Experiment Station Research Reports
Crop performance and yield within production fields varies as a function of growing environment and soil properties within the field. Components contributing to yield in corn, wheat, and soybean production were examined through on-farm measurements of soil properties in southeast Kansas. Additional tests in research plots explored components contributing to yield in greater detail. Environmental variability between the 2013 and 2014 growing seasons contributed to differences in yield. Additional variability in soil parameters influenced crop performance, particularly for soils high in clay content.
2014 Crop Performance In Southeast Kansas, G. F. Sassenrath, J. Lingenfelser, J. Mengarelli, K. Kusel
2014 Crop Performance In Southeast Kansas, G. F. Sassenrath, J. Lingenfelser, J. Mengarelli, K. Kusel
Kansas Agricultural Experiment Station Research Reports
Crop variety testing determines the production potential of newly released crop cultivars in Southeast Kansas. The genetic potential is moderated by environmental conditions during the growing season as well as soil productive capacity.
Effects Of Supplementation With Corn Or Dried Distillers Grains On Gains Of Heifer Calves Grazing Smooth Bromegrass Pastures, L. W. Lomas, J. L. Moyer
Effects Of Supplementation With Corn Or Dried Distillers Grains On Gains Of Heifer Calves Grazing Smooth Bromegrass Pastures, L. W. Lomas, J. L. Moyer
Kansas Agricultural Experiment Station Research Reports
Thirty heifer calves grazing smooth bromegrass pastures were used to compare supplementation with 0.5% of body weight per head daily of corn or dried distillers grains (DDG). Daily gains of heifers supplemented with corn or DDG were similar (P > 0.05).
Evaluation Of Tall Fescue Cultivars, J. L. Moyer
Evaluation Of Tall Fescue Cultivars, J. L. Moyer
Kansas Agricultural Experiment Station Research Reports
Stand frequency in spring 2014 was higher for ‘AU Triumph’ than for ‘AGRFA-111’ and ‘BarOptima Plus E34.’ Spring 2014 yield was higher for ‘Jesup MaxQ’ and ‘Texoma MaxQ II’ than for 10 of the 17 other entries. Fall production was greater for ‘AGRFA- 111’ and ‘Bar FA80 DH’ than for 13 other entries. Total 2014 production was higher for ‘Texoma MaxQ II’ than for five other cultivars. Total 4-year forage production was greater for ‘Texoma MaxQ II’ and ‘Martin 2 647’ than for the seven below-average entries. ‘Bariane’ and ‘AGRFA-179’ were lower than for six of the highest-yielding entries.
Improving Yield Stability And Resiliency Of Agronomic Production Systems In Southeast Kansas, G. F. Sassenrath, J. K. Farney, Deann Presley, C. Davis
Improving Yield Stability And Resiliency Of Agronomic Production Systems In Southeast Kansas, G. F. Sassenrath, J. K. Farney, Deann Presley, C. Davis
Kansas Agricultural Experiment Station Research Reports
Soil health is a critical determinant of crop performance. Soil physical, chemical, and biological properties can be modified through production practices such as tillage. Use of cover crops has been shown to benefit soil health and may improve productive capacity of soils. High rainfall and intense crop production practices limit the ability to implement cover crops in current production systems in southeast Kansas. This study explores potential management of cover crops and their contribution to soil health, crop productivity, and animal grazing.
Weather Information For Tribune, H. D. Bond, R. Mai
Weather Information For Tribune, H. D. Bond, R. Mai
Kansas Agricultural Experiment Station Research Reports
Tribune, Kansas: In 2014, annual precipitation of 16.31 in. was recorded, which is 1.59 in. below normal. Seven months had below-normal precipitation. June (3.61 in.) was the wettest month. The largest single amount of precipitation was 1.54 in. on July 30.
Fallow Replacement Crop (Cover Crops, Annual Forages, And Short-Season Grain Crops) Effects On Available Soil Water, J. D. Holman, T. Roberts, S. Maxwell, I. Kisekka, A. Obour
Fallow Replacement Crop (Cover Crops, Annual Forages, And Short-Season Grain Crops) Effects On Available Soil Water, J. D. Holman, T. Roberts, S. Maxwell, I. Kisekka, A. Obour
Kansas Agricultural Experiment Station Research Reports
Producers are interested in growing cover crops and reducing fallow. Limited information is available on growing crops in place of fallow in the semiarid Great Plains. Between 2012 and 2015, spring cover, annual forage, and grain crops were grown in place of fallow in a no-till wheat-grain sorghum-fallow (WSF) rotation in southwest Kansas. Growing a cover, hay, or grain crop in place of fallow reduced the amount of stored soil moisture at wheat planting. On average, cover crops stored slightly more moisture than hay crops, but this soil moisture difference did not affect wheat yields. Soil moisture after grain crops …
Determining Profitable Annual Forage Rotations, J. D. Holman, T. Roberts, S. Maxwell
Determining Profitable Annual Forage Rotations, J. D. Holman, T. Roberts, S. Maxwell
Kansas Agricultural Experiment Station Research Reports
Producers are interested in growing forages, yet the southwest region of Kansas lacks proven recommended crop rotations such as those for grain crops. Forage production is important to the region’s livestock and dairy industries and is becoming increasingly important as irrigation well capacity declines. Forages require less water than grain crops and may allow for increased cropping intensity and opportunistic cropping. A study was initiated in 2013 comparing several 1-, 3-, and 4-year forage rotations with no-till and minimum-till (min-till). Data presented are from 2013 through 2014. Winter triticale yields were not affected by tillage in 2013 but were increased …
Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel
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 efficiency …