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Articles 1 - 24 of 24
Full-Text Articles in Life Sciences
Methods For Improving Potassium Fertilizer Recommendations For Corn In South Dakota, Andrew J. Ahlersmeyer
Methods For Improving Potassium Fertilizer Recommendations For Corn In South Dakota, Andrew J. Ahlersmeyer
Electronic Theses and Dissertations
Corn (Zea mays L.) is a vital commodity in South Dakota’s agricultural sector. Optimal corn production occurs when there are sufficient mineral nutrients in the soil, especially potassium (K). Applications of K fertilizer are used when soil test K (STK) levels are deficient. Therefore, producers need reliable, thoroughly tested fertilizer recommendations to make profitable decisions and maintain environmental stewardship. South Dakota K fertilizer recommendations have not been updated in nearly 20 years. Simultaneously, changes in corn genetics, management practices, and climate patterns suggest that the critical soil test value (CSTV) for STK may have shifted in that same time frame. …
Determining The Impact Of Corn Source On Nutrient Availability And Pig Performance, And Improving Boar Performance During Heat Stress, Jordan Jansen
Determining The Impact Of Corn Source On Nutrient Availability And Pig Performance, And Improving Boar Performance During Heat Stress, Jordan Jansen
Electronic Theses and Dissertations
The quality and effectiveness of the feedstuffs included in diets of production livestock directly impact yield efficiency and performance characteristics desired by producers. This thesis focuses on the performance and digestibility of corn from different countries in pig diets and how different feed additives can be supplemented to improve boar reproductive performance during heat stress. Corn is the largest energy source in common pig diets. The physical characteristics of corn such as broken kernels, foreign material, and excessive dust are said to negatively impact the quality of the grain for pig diets by being less digestible and a worsened nutrient …
Characterization Of Bacterial Endophytes Isolated From Brassica Carinata And Their Potential Use To Decrease Nutrient Requirements In Crops, Alex Soupir
Electronic Theses and Dissertations
Bacterial endophytes have the capability to enhance plant growth by producing plant growth hormones, solubilizing phosphates, suppressing pathogenic fungi, and reducing plant stress hormones. These capabilities make them desirable limiting the amount of nutrients and pesticides that are applied to crops. Through these assays and isolations, it is possible to identify novel bacterial species. In-vitro testing had shown 9 of the 20 isolates possess the ability to produce indole-3-acetic acid (IAA) with Pantoea agglomerans BC09 producing a concentration of 30.2 ng/μl over 4 days. BC09, Bacillus subilis BC10, and Pantoea sp. BC12 were able to solubilize calcium phosphate, 7 endophytes …
Impacts Of Small Intestinal Enzyme Activity And Varying Corn Grain Processing Types On Feeding Behavior, And Growth Performance Of Finishing Beef Steers, Wyatt Smith
Electronic Theses and Dissertations
The objective of this study was to quantify the differences in activity of jejunal maltase and isomaltase between 2 groups of steers with average dry matter intake (DMI) and differing average daily gain (ADG). Dry matter intake and ADG were measured in crossbred steers (n = 69). Jejunal mucosal samples were collected from 8 steers with the greatest (high) or least (low) ADG and average DMI (± 0.55 standard deviation). Homogenates of jejunal mucosa were incubated with increasing amounts of maltose and isomaltose to determine the disaccharidase kinetics. Neither the Km of isomaltase (P = 0.15) or maltase (P = …
Performance Of The Producer Accumulator In Corn And Soybean Commodity Markets, Chad Te Slaa
Performance Of The Producer Accumulator In Corn And Soybean Commodity Markets, Chad Te Slaa
Electronic Theses and Dissertations
This research quantifies risk reduction and performance of the producer accumulator contract in corn and soybean markets. To quantify performance, we use three alternative theoretical pricing models to estimate historical producer accumulator contract specifications in corn and soybean markets. We then compare the performance of the producer accumulator to eight alternative agricultural marketing strategy portfolios that are also used in new generation grain contracts. The performance measures we compare are: average bushel price that would be received by the producer, daily portfolio risk, and the Sharpe ratio. The period we examine performance was between 2008 and 2017. We investigate performance …
Evaluation Of Tillage, Crop Rotation, And Cover Crop Impacts On Corn Nitrogen Requirements In Southeastern South Dakota, Sara Louise Berg
Evaluation Of Tillage, Crop Rotation, And Cover Crop Impacts On Corn Nitrogen Requirements In Southeastern South Dakota, Sara Louise Berg
Electronic Theses and Dissertations
Nitrogen (N) is a vital factor of corn (Zea mays) production. Previous work in South Dakota has shown that there is uncertainty as to whether nitrogen requirements are the same for corn raised under no-till (NT) versus conventional till (CT) production systems. The objective of this study was to evaluate whether N requirements continue to be greater under long-term NT versus CT production systems in southeastern South Dakota, while also considering effects from cover crops and crop rotation. This was a two year study conducted at the SDSU Southeast Research Farm near Beresford, SD; it was superimposed on a long-term …
Evaluation Of Flame Weeding In Southeastern South Dakota, Benjamin William Arlt
Evaluation Of Flame Weeding In Southeastern South Dakota, Benjamin William Arlt
Electronic Theses and Dissertations
Weed management is the main yield-limiting factor in production of organic crops. Currently, organic producers have limited resources available for in-row weed management. Flame weeding has been recognized for its potential as one part of an integrated approach at weed management in organic systems. Flame weeding uses propane fueled torches to heat plant tissue and denature proteins, thus injuring or destroying the affected tissue. When properly timed, flame weeding can effectively be used for weed control in corn and soybean fields. Corn and soybean have both shown tolerances to flame weeding and minimal yield loss with well-managed and timed flame …
Study Of The Effect Of Feeding Highly Digestible Corn Based Calf Starter On The Growth Performance Of Calves, Shruti Srivastava
Study Of The Effect Of Feeding Highly Digestible Corn Based Calf Starter On The Growth Performance Of Calves, Shruti Srivastava
Electronic Theses and Dissertations
New corn hybrids have been developed by Masters Choice (MC) that vary in energy density and starch digestibility. These MC hybrids have lower starch densities due to an altered starch structure, which allows for greater ruminal and intestinal starch digestion. The altered starch structure of these new hybrids results in reduced feed manufacturing costs (i.e., grinding). Thirty (30) 1 to 3 d old (40.6 ± 1.72 kg) Holstein heifer calves were randomly assigned to 1 of 2 calf starters to measure growth performance of Holstein heifer calves through 8 weeks of age. Treatments were: 1) Hard starch (HS) corn calf …
Preference Of White-Tailed Deer For Corn Hybrids And Agricultural Husbandry Practices During The Growing Season, Joshua A. Delger, Kevin L. Monteith, Lowell E. Schmitz, Jonathan A. Jenks
Preference Of White-Tailed Deer For Corn Hybrids And Agricultural Husbandry Practices During The Growing Season, Joshua A. Delger, Kevin L. Monteith, Lowell E. Schmitz, Jonathan A. Jenks
Natural Resource Management Faculty Publications
Damage to field corn (Zea mays) by white-tailed deer (Odocoileus virginianus) can be substantial, resulting in millions of dollars lost annually. Numerous methods exist to minimize deer depredation, but all have met with varying degrees of success. Currently, little information is available on preference of white-tailed deer for corn hybrids during the growing season and how that preference might affect depredation patterns. We used adult female white-tailed deer in captivity to study the effect of herbicide treatments on deer-use (treatment versus no treatment) of corn in 2005 and to document preference among specific corn hybrids in …
Effect Of Supplementing Distillers Grain Or Corn On Performance Of Cows Grazing Spring Pasture During The Breeding Season, Tyler A. Melroe, Richard J. Pruitt, George A. Perry, Jeffrey A. Clapper, Heather A. Werner
Effect Of Supplementing Distillers Grain Or Corn On Performance Of Cows Grazing Spring Pasture During The Breeding Season, Tyler A. Melroe, Richard J. Pruitt, George A. Perry, Jeffrey A. Clapper, Heather A. Werner
South Dakota Beef Report, 2006
In a 2 yr study 180 lactating cows (2 to 10 yr old) grazing pastures dominated by smooth bromegrass and Kentucky bluegrass near Brookings, SD received 3 supplemental treatments for 48 d beginning in mid May. Cows received 4.6 lb DM of dried distillers grains with solubles (DDGS), 4.3 lb corn DM, or no supplement daily, starting approximately 14 d prior to the start of the breeding season. Cows were bled weekly for 5 wk beginning 1 wk prior to the beginning of the treatment period. Serum was analyzed for progesterone concentration to determine the onset of cyclicity. While supplemented …
Effects Of Wheat Middlings On Utilization Of Mature Prairie Hay By Steers, J. S. Heldt, R. J. Pruitt
Effects Of Wheat Middlings On Utilization Of Mature Prairie Hay By Steers, J. S. Heldt, R. J. Pruitt
South Dakota Beef Report, 1995
A digestibility trial measuring intake, digestibility, ruminal nutrient disappearance, and ruminal pH was conducted to determine the effects of wheat middlings on utilization of mature prairie hay. Treatments included supplements used in a previous winter grazing trial at the SDSU Cottonwood Research Station that were balanced to provide the following amounts of crude protein (Ib) and metabolizable energy (Mcal) per cow daily: 1) soybean meal .75 and 2.40, 2) low wheat middlings .75 and 4.76, 3) corn-soybean meal 1.50 and 9.40, and 4) high wheat middlings 1.50 and 9.40. These supplements were fed to the steers in proportional amounts based …
Net Energy Of Finishing Diets Containing Light Or Normal Test Weight Corn, C. P. Birkelo, R. H. Pritchard, M. Buhman, S. Grosch, C. Willms
Net Energy Of Finishing Diets Containing Light Or Normal Test Weight Corn, C. P. Birkelo, R. H. Pritchard, M. Buhman, S. Grosch, C. Willms
South Dakota Beef Report, 1994
Net energy (NE) of diets containing 77.7% whole corn of either normal (53.8 Ib/bushel, NC) or light (40.8 Ib/bushel, LC) test weight was determined by total collection and indirect respiration calorimetry using six crossbred steers (avg wt 327 kg). Diet treatments were applied in a switchback design. The steers were initially adapted to ad libitum intake of either NC or LC diets for 32 days followed by 7 days total feces and urine collection. Gaseous exchange was subsequently measured for at least 48 hours. Intake was then reduced to an estimated 1.1 times maintenance for 6 days and collections were …
Effect Of Inoculants On High Moisture Corn Fermentation Characteristics And Cattle Performance, C. P. Birkelo, D. Sorenson
Effect Of Inoculants On High Moisture Corn Fermentation Characteristics And Cattle Performance, C. P. Birkelo, D. Sorenson
South Dakota Beef Report, 1991
High moisture corn was ensiled untreated (treatment 1) or treated with one of three different inoculants (treatment 2 = lactobacillus; treatment 3 = lactobacillus + streptococcus; treatment4 = lactobacillus + serratia), each at two moisture levels (27.2% and 22.4%). lnoculant effects on fermentation were moisture dependent. The pH, acetate concentrations and dry matter losses were generally lower and lactate concentrations higher due to inoculation at 27.2% moisture. Overall, treatment 3 was somewhat more effective than treatments 2 or 4. Inoculation effects were generally less at 22.4% moisture. lnoculant effects on soluble N were small and probably of little nutritional importance. …
Substitution Of Rolled Barley For Whole Shelled Corn In Finishing Diets For Steers, R. H. Pritchard, M. A. Robbins
Substitution Of Rolled Barley For Whole Shelled Corn In Finishing Diets For Steers, R. H. Pritchard, M. A. Robbins
South Dakota Beef Report, 1991
Rolled barley was substituted for 0, 25, 50, 75 or 100% of the whole shelled corn in finishing diets fed to steers for 84 days. Increasing barley substitution resulted in a linear (P=.12) decrease in ADG and a quadratic (P<.05) decrease in DM1 with no effect on feed conversion. At the termination of the study, barley substitution caused a linear reduction in carcass weight (P<.01) and dressing percent (P<.01). The 100% substitution of barley for corn reduced (Pc.05) the percentage of carcasses grading choice. Dietary net energy values calculated from steer weights, gain and feed intake increased linearly (P<.10) as barley content of the diets increased, possibly reflecting positive associative effects. Published energy values for barley may not be suitable for least cost pricing in all feeding situations.
Late Summer Care Of The Corn Crop, Ralph E. Johnston, George H. Valentine
Late Summer Care Of The Corn Crop, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on caring for corn crops during the late summer period. This information is provided through the guidance of the Agriculture Department.
Care Of The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
Care Of The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
The care of the corn breeding plot during the summer is a very important part and a very large part of corn breeding work. It is by properly caring for the crop that we learn ignore of the habits of the plant and learn more of giving the plants the best of care. The early cultivation of the breeding plot cannot be over emphasized. It is only by the very best of care that one can expect to be successful with a corn breeding plot, and of all care given during the year, the early cultivation is by far the …
Cultivating The Corn Crop, Ralph E. Johnston, George H. Valentine
Cultivating The Corn Crop, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on the aspect of the cultivation of the corn crop through the guidance of the Agricultural Department.
The Soil And Seed Bed For Corn, Ralph E. Johnston, George H. Valentine
The Soil And Seed Bed For Corn, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on finding sufficient soil and seed beds to plant corn in through the guidance of the Agricultural Department.
Selecting And Planting The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
Selecting And Planting The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on selecting and then planting a corn breeding plot through the guidance of the Agriculture Department.
Selecting And Preparing Seed For The Breeding Plot, Ralph E. Johnston, George H. Valentine
Selecting And Preparing Seed For The Breeding Plot, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
It is very important in the starting of corn breeding work to begin with the very best of seed. Naturally the selecting of seed and the preparation of it for planting must receive careful attention.
Corn Groups And Varieties, Ralph E. Johnston, George H. Valentine
Corn Groups And Varieties, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In the study of corn culture a very intimate knowledge of corn varieties is a necessity. The experienced corn grower known the advantages of different varieties and if he is a corn breeder he will endeavor to develop some of the more desirable characters of several varieties into one variety.
Description Of The Corn Plant, Ralph E. Johnston, George H. Valentine
Description Of The Corn Plant, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
Before discussing the methods of the culture of corn we must know something of the plant itself. We must, in fact, be intimately acquainted with the plant and all its parts, their structure and something of the functions they perform. The method of growth must also be known in order to develop the desirable characters and to gradually eliminate the more undesirable characters. This circular is divided into dive divisions. Each division takes up a part of the corn plant and describes it in detail.
Harvesting Storing And Marketing The Corn Crop, Ralph E. Johnston, George H. Valentine
Harvesting Storing And Marketing The Corn Crop, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on harvesting the corn crop through the guidance of the Agriculture Department.
Harvesting The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
Harvesting The Corn Breeding Plot, Ralph E. Johnston, George H. Valentine
SDSU Extension Circulars
In this circular, created by the Agricultural Extension Service at South Dakota State College, the information provided focuses on the harvesting of the corn breeding plot through the guidance of the Agricultural Department.