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2015

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Full-Text Articles in Agriculture

Human Issues In Horticulture: A Bibliography, Diana M. Farmer Apr 2015

Human Issues In Horticulture: A Bibliography, Diana M. Farmer

NPP eBooks

This is a comprehensive bibliography of a rather broad subject area—horticultural therapy. The subject reflects a change in the definition of horticulture as the art and science of growing fruits, vegetables and flowers to include horticulture’s effects on human well-being. The number of citations also reflects the growth and continuing evolvement of this discipline. This bibliography does not include journal articles. It does include monographs, treatises, books, pamphlets, theses, dissertations and media published prior to 2000. The gardening references include a human focus and there are references as well to associated topics such as universal design, accessibility, human perception, environment …

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Using A Generalized Linear Mixed Model Framework To Account For Spatial Variability In A Comparison Of Orchard Sprayer Efficacy, William J. Price, Bahman Shafii, Don Morishita Apr 2015

Using A Generalized Linear Mixed Model Framework To Account For Spatial Variability In A Comparison Of Orchard Sprayer Efficacy, William J. Price, Bahman Shafii, Don Morishita

Conference on Applied Statistics in Agriculture

Uniform application of pesticides in vineyard and orchard systems can be difficult to achieve due to variability in the density and structure of the crop canopy. Depending on the equipment used and environmental conditions, applications can result in poor spray coverage, spray drift, and wasted spray which, in turn, are manifested as a combination of poor pesticide efficacy, economic losses and potential environmental problems for the grower. A study was therefore designed and carried out to test new sprayer equipment aimed at addressing these issues. Statistically, the study presented a unique replicated three dimensional spatial design which captured response variability …

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Statistical Methods In Topological Data Analysis For Complex, High-Dimensional Data, Patrick S. Medina, R W. Doerge Jan 2015

Statistical Methods In Topological Data Analysis For Complex, High-Dimensional Data, Patrick S. Medina, R W. Doerge

Conference on Applied Statistics in Agriculture

The utilization of statistical methods an their applications within the new field of study known as Topological Data Analysis has has tremendous potential for broadening our exploration and understanding of complex, high-dimensional data spaces. This paper provides an introductory overview of the mathematical underpinnings of Topological Data Analysis, the workflow to convert samples of data to topological summary statistics, and some of the statistical methods developed for performing inference on these topological summary statistics. The intention of this non-technical overview is to motivate statisticians who are interested in learning more about the subject.

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Best Linear Unbiased Prediction: An Illustration Based On, But Not Limited To, Shelf Life Estimation, Maryna Ptukhina, Walter Stroup Jan 2015

Best Linear Unbiased Prediction: An Illustration Based On, But Not Limited To, Shelf Life Estimation, Maryna Ptukhina, Walter Stroup

Conference on Applied Statistics in Agriculture

Shelf life estimation procedures, following ICH guidelines, use multiple batch regression with fixed batch effects. This guidance specifically mandates estimates based on at least 3 batches. Technically, the fixed-batch model limits inference to the batches actually observed, whereas ICH requires resulting estimates to apply to all future batches stored under similar conditions. This creates a conflict between the model used and the inference space the model is intended to address. Quinlan, et al. (2013) and Schwenke (2010) studied the small sample behavior of this procedure. Both studies revealed large sampling variation associated with the ICH procedure, producing a substantial proportion …

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Shiga Toxin-Producing Escherichia Coli In Meat: A Preliminary Simulation Study On Detection Capabilities For Three Sampling Methods, Julie Couton, David Marx, John Luchaansky, Randall Phebus, Anna Porto-Fett, Nicholas Sevart, Manpreet Singh, Harshavardhan Thippareddi Jan 2015

Shiga Toxin-Producing Escherichia Coli In Meat: A Preliminary Simulation Study On Detection Capabilities For Three Sampling Methods, Julie Couton, David Marx, John Luchaansky, Randall Phebus, Anna Porto-Fett, Nicholas Sevart, Manpreet Singh, Harshavardhan Thippareddi

Conference on Applied Statistics in Agriculture

Contamination by Shiga Toxin-producing Escherichia coli (STEC) is a continuing concern for meat production facility management throughout the United States. Several methods have been used to detect STEC during meat processing, however the excessive experimental cost of determining the optimal method is rarely feasible. The objective of this preliminary simulation study is to determine which sampling method (Cozzini core sampler, core drill shaving, and N-60 surface excision) will better detect STEC at varying levels of contamination present in the meat. 1000 simulated experiments were studied using a binary model for rare occurrences to find the optimal method. We found that …

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Differential Methylation Methods In Multi-Context Organisms, Douglas Baumann, Yuqing Su, Iranga Mendis, Gayla R. Olbricht Jan 2015

Differential Methylation Methods In Multi-Context Organisms, Douglas Baumann, Yuqing Su, Iranga Mendis, Gayla R. Olbricht

Conference on Applied Statistics in Agriculture

DNA methylation is an epigenetic modification that has the ability to alter gene expression without any change in the DNA sequence. DNA methylation occurs when a methyl chemical group attaches to cytosine bases on the DNA sequence. In mammals, DNA methylation primarily occurs at CG sites, when a cytosine is followed by a guanine in the DNA sequence. In plants, DNA methylation can also occur in other cytosine sequences, such as when a cytosine is not followed directly by a guanine. Many of the statistical methods that have been developed to estimate methylation levels and test differential methylation in whole-genome …

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On Fixed Effects Estimation In Spline-Based Semiparametric Regression For Spatial Data, Guilherme Ludwig, Jun Zhu, Chun-Shu Chen Jan 2015

On Fixed Effects Estimation In Spline-Based Semiparametric Regression For Spatial Data, Guilherme Ludwig, Jun Zhu, Chun-Shu Chen

Conference on Applied Statistics in Agriculture

Spline surfaces are often used to capture spatial variability sources in linear mixed-effects models, without imposing a parametric covariance structure on the random effects. However, including a spline component in a semiparametric model may change the estimated regression coefficients, a problem analogous to spatial confounding in spatially correlated random effects. Our research aims to investigate such effects in spline-based semiparametric regression for spatial data. We discuss estimators' behavior under the traditional spatial linear regression, how the estimates change in spatial confounding-like situations, and how selecting a proper tuning parameter for the spline can help reduce bias.

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Small Sample Properties Of The Two Independent Sample Test For Means From Beta Distributions, Edward E. Gbur, Kevin Thompson Jan 2015

Small Sample Properties Of The Two Independent Sample Test For Means From Beta Distributions, Edward E. Gbur, Kevin Thompson

Conference on Applied Statistics in Agriculture

Researchers often collect proportion data that cannot be interpreted as arising from a set of Bernoulli trials. Analyses based on the beta distribution may be appropriate for such data. The SAS® GLIMMIX procedure provides a tool for these analyses using a likelihood based approach within the larger context of generalized linear mixed models (GLMM). The small sample behavior of likelihood based tests to compare the means from two independently sampled beta distributions were studied via simulation when the null hypothesis of equal means holds. Two simulation scenarios were defined by equal and unequal sample sizes and equal scale parameters. A …

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Modeling The Occurrence Of Four Cereal Crop Aphid Species In Idaho, John W. Merickel, Bahman Shafii, Sanford D. Eigenbrode, Christopher J. Williams, William J. Price Jan 2015

Modeling The Occurrence Of Four Cereal Crop Aphid Species In Idaho, John W. Merickel, Bahman Shafii, Sanford D. Eigenbrode, Christopher J. Williams, William J. Price

Conference on Applied Statistics in Agriculture

Idaho is ranked 5th in the United States in overall wheat production and makes over $500 million in profit annually from wheat. Many pests have detrimental effects on wheat; some of the most predominant ones are aphids. Four species of aphids having economic effects on wheat crops in Idaho are: Diuraphis noxia, Metopolophium dirhodum, Rhopalosiphum padi, Sitobion avenae. Predictive regression models could be useful for better understanding of the occurrence of these aphid species. Count data for the four species were collected over 17 years via suction traps at 12 locations in wheat fields throughout …

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Editor's Preface And Table Of Contents, Perla E. Reyes Jan 2015

Editor's Preface And Table Of Contents, Perla E. Reyes

Conference on Applied Statistics in Agriculture

These proceedings contain papers presented at the twenty-seventh annual Kansas State University Conference on Applied Statistics in Agriculture, held in Manhattan, Kansas, April 26 - April 28, 2015

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Effects Of Growth-Promoting Technologies On Feedlot Performance And Carcass Characteristics Of Crossbred Heifers, S. M. Ebarb, K. J. Phelps, J. E. Axman, C. L. Van Bibber, J. S. Drouillard, J. M. Gonzalez Jan 2015

Effects Of Growth-Promoting Technologies On Feedlot Performance And Carcass Characteristics Of Crossbred Heifers, S. M. Ebarb, K. J. Phelps, J. E. Axman, C. L. Van Bibber, J. S. Drouillard, J. M. Gonzalez

Kansas Agricultural Experiment Station Research Reports

The use of growth-promoting technologies has become a common practice in the beef cattle industry as producers strive for efficient growth and greater lean deposition. Two common technologies include exogenous hormonal implants and beta-adrenergic agonists (β-AA). Combination implants containing estrogen and testosterone increase muscle mass by elevating protein synthesis and/or reducing protein degradation. The increase in protein synthesis allows the animal to produce more lean muscle tissue. Optaflexx (Elanco Animal Health, Greenfield, IN) is a popular β-AA that works as a repartitioning agent to redirect nutrients toward muscle deposition and away from adipose tissue production. The two technologies utilize separate …

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Nitrogen, Phosphorus, And Potassium Fertilization For Newly Established Tall Fescue, D. W. Sweeney, J. L. Moyer Jan 2015

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.

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Identification Of Yield-Limiting Factors In Southeast Kansas Cropping Systems, G. F. Sassenrath, X. Lin, D. E. Shoup Jan 2015

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.

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Improving Yield Stability And Resiliency Of Agronomic Production Systems In Southeast Kansas, G. F. Sassenrath, J. K. Farney, Deann Presley, C. Davis Jan 2015

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.

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Response Of Soybean Grown On A Claypan Soil In Southeastern Kansas To The Residual Of Different Plant Nutrient Sources And Tillage, D. W. Sweeney, P. Barnes, G. Pierzynski Jan 2015

Response Of Soybean Grown On A Claypan Soil In Southeastern Kansas To The Residual Of Different Plant Nutrient Sources And Tillage, D. W. Sweeney, P. Barnes, G. Pierzynski

Kansas Agricultural Experiment Station Research Reports

The residual effects of turkey litter and fertilizer amendments applied in previous years had little effect on the yield, yield components, and dry matter production of the following soybean crop grown in 2014.

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2014 Crop Performance In Southeast Kansas, G. F. Sassenrath, J. Lingenfelser, J. Mengarelli, K. Kusel Jan 2015

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.

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Effects Of Various Forage Systems On Grazing And Subsequent Finishing Performance, L. W. Lomas, J. L. Moyer Jan 2015

Effects Of Various Forage Systems On Grazing And Subsequent Finishing Performance, L. W. Lomas, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

A total of 200 mixed black yearling steers were used to compare grazing and subsequent finishing performance from pastures with ‘MaxQ’ tall fescue, a wheat-bermudagrass double-crop system, or a wheat-crabgrass double-crop system in 2010, 2011, 2012, 2013, and 2014. Daily gains of steers that grazed ‘MaxQ’ tall fescue, wheat-bermudagrass, or wheat-crabgrass were similar (P>0.05) in 2010, daily gains of steers that grazed wheat-bermudagrass or wheat-crabgrass were greater (P>0.05) than those that grazed ‘MaxQ’ tall fescue in 2011 and 2012, daily gains of steers that grazed wheat-crabgrass were greater (P>0.05) than those that grazed wheat-bermudagrass …

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Soybean Production: Planting Date × Variety, Southeast Kansas, G. F. Sassenrath, I. A. Ciampitti, D. E. Shoup Jan 2015

Soybean Production: Planting Date × Variety, Southeast Kansas, G. F. Sassenrath, I. A. Ciampitti, D. E. Shoup

Kansas Agricultural Experiment Station Research Reports

Optimal soybean planting in southeast Kansas usually occurs from mid-May to mid- June for full-season or late June to early July for double-cropped soybean. Planting is timed to capture fall rains and cooler temperatures during critical periods of bean development and yield formation to avoid midsummer heat and drought.

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Evaluating Multispecies Cover Crops For Forage Production, C. Davis, D. Presley, J. K. Farney, G. F. Sassenrath Jan 2015

Evaluating Multispecies Cover Crops For Forage Production, C. Davis, D. Presley, J. K. Farney, G. F. Sassenrath

Kansas Agricultural Experiment Station Research Reports

Cover crops offer potential benefits for improving soil health, but establishment and management costs can be expensive. One way for farmers to recover these costs is to graze the forage, which benefits producers by integrating crop and animal production. More information is needed on the potential forage quantity and quality for grazing livestock of cover crops and mixed species of cover crops. Researchers have suggested that different plant species complement each other, but additional work is needed to determine how best to balance forage production and how competitive the various species are when added to a mix. Sixteen treatments were …

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Adaptability Of Miscanthus Cultivars For Biomass Production, J. L. Moyer Jan 2015

Adaptability Of Miscanthus Cultivars For Biomass Production, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

In 2014, miscanthus dry matter (DM) did not differ between cultivars, averaging 10,970 lb/a. Total two-year production totaled 15,920 lb DM/a.

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Nitrogen Management For Teff Hay Production, D. H. Min, J. L. Moyer Jan 2015

Nitrogen Management For Teff Hay Production, D. H. Min, J. L. Moyer

Kansas Agricultural Experiment Station Research Reports

Fertilization of teff with nitrogen (N) resulted in increased forage production, but amounts above 25 lb/a did not often increase yields in this study. Urea as the N source produced at least as much yield response as the alternate, an extended source of nitrogen (ESN).

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Effects Of Supplementation With Corn Or Dried Distillers Grains On Gains Of Heifer Calves Grazing Smooth Bromegrass Pastures, L. W. Lomas, J. L. Moyer Jan 2015

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).

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Evaluation Of Tall Fescue Cultivars, J. L. Moyer Jan 2015

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.

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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 Jan 2015

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 …

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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 Jan 2015

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 includeCooperia,Haemonchus, andOstertagia. 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 …

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Evaluation Of Calcium Hydroxide-Treated Stover (Second Crop) In Receiving And Growing Diets And Effects On Cattle Performance, T. Spore, S. Montgomery, C. Vahl, B. E. Oleen, W. R. Hollenbeck, J. W. Waggoner, J. Hill, D. A. Blasi Jan 2015

Evaluation Of Calcium Hydroxide-Treated Stover (Second Crop) In Receiving And Growing Diets And Effects On Cattle Performance, T. Spore, S. Montgomery, C. Vahl, B. E. Oleen, W. R. Hollenbeck, J. W. Waggoner, J. Hill, D. A. Blasi

Kansas Agricultural Experiment Station Research Reports

Production of ethanol from corn as an alternative fuel source has significantly affected the pricing landscape for corn as an energy source for livestock. As ethanol usage has become more prevalent, corn prices have become more volatile, especially in critical corn-growing areas that have been affected by drought. Consequently, many beef cattle feeders have become interested in alternative energy sources in an effort to control cost of gain. Second Crop (ADM Corp., Decatur, IL) is a process in which calcium hydroxide is added to fibrous crop residues, such as wheat straw and corn stover. When applied to low-quality roughages, calcium …

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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 Jan 2015

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 …

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An Injectable Trace Mineral Supplement In Yearling Bulls Causes A Short-Term Increase In Circulating Trace Mineral Levels But Does Not Improve Sperm Quality, A. A. Kirchhoff, K. E. Fike, R. Breiner Jan 2015

An Injectable Trace Mineral Supplement In Yearling Bulls Causes A Short-Term Increase In Circulating Trace Mineral Levels But Does Not Improve Sperm Quality, A. A. Kirchhoff, K. E. Fike, R. Breiner

Kansas Agricultural Experiment Station Research Reports

Proper trace mineral supplementation is necessary for reproductive development and function. Supplementation with various trace minerals has been shown to improve overall sperm quality and morphology and increase the percentage of live sperm. When developing beef bulls, it is necessary to meet trace mineral requirements to ensure proper reproductive success. An injectable trace mineral product has been made commercially available for use in cattle as a supplemental form of chelated selenium, copper, zinc, and manganese. Considering the role of trace minerals in bull reproductive function, we posed the question of whether using an injectable trace mineral product beyond dietary supplementation …

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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 Jan 2015

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 …

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Lactipro (Megasphaera Elsdenii) Increases Ruminal Ph And Alters Volatile Fatty Acids And Lactate During Transition To An 80% Concentrate Diet, J. Thieszen, C. L. Van Bibber, J. E. Axman, J. S. Drouillard Jan 2015

Lactipro (Megasphaera Elsdenii) Increases Ruminal Ph And Alters Volatile Fatty Acids And Lactate During Transition To An 80% Concentrate Diet, J. Thieszen, C. L. Van Bibber, J. E. Axman, J. S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Direct-fed microbials commonly have been used to enhance performance or to decrease shedding of foodborne pathogens in beef cattle.Megasphaera elsdeniiis a recently introduced probiotic bacteria marketed under the trade name Lactipro (MS-Biotec Inc., Wamego, KS) and is a key lactate-fermenting bacterium in the rumens of cattle fed high-concentrate diets.Megasphaera elsdeniiis responsible for metabolizing up to 95% lactic acid within the rumen, and thus is an important species for controlling occurrence of ruminal acidosis. The objective of this study was to evaluate changes in ruminal pH and volatile fatty acid concentration during the transition from a diet …

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