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Capital Investment Requirements For A 500, 1,000 And 10,000 Head Cattle Feedlot, Robert Allen, Myron Eighmy, David Jibben

Economics Research Reports

The purpose of this study is to figure the fixed costs of constructing and equipping a 500, 1,000 or 10,000 cattle feedlot given certain assumptions and restrictions, and to analyze those costs in terms of economic efficiency. The fixed costs are divided into six areas of analysis: the equipment of the feedlot, the pole buildings, the concrete flooring for the pole buildings, the feedlot building materials, the feedlot storage equipment and the waste disposal.

Southeast South Dakota Experiment Farm Annual Progress Report, 1976, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This sixteenth annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn breeding and performance, soybean research and planting, crop rotation, grain trials, and animal waste disposal.

Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1976, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1976 progress report for the Central Crops and Soils Research Station at Highmore, South Dakota State College. This document represents the research conducted at the Station during the 1976 crop season including: weather data, weed control for crop production, tillage and fertility experiments, winter wheat, and small grain variety trials.

West River Agricultural Research And Extension Center Progress Report, 1976, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1976 annual progress report of the West River Crops Soils Research and Extension Center, South Dakota Agricultural Experiment Station. This report includes: a weather summary, small grain variety trials, specialty crop variety trials, sorghum variety testing, irrigated alfalfa trials, water management trials, management, tillage and cultural practices, fertilizer studies on spring wheat, crop disease control, and plot information.

South Dakota Farm And Home Research, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

This issue includes the 89th Agricultural Experiment Station annual report.

South Dakota Farm And Home Research, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Alfalfa Haylage Gains from Addition of Dried Whey [p] 3
The Back Side Makes a Difference [p] 6
Spotting the Protein in Bread Wheats [p] 8
Out There Waiting for You [p] 11
Why Some Manpower Programs Fail [p] 13

Financial Analysis South Dakota Farm Panel Records Program 1975, Herbert R. Allen, David Jibben

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

The data in this report have been obtained from a selected number of farms located in Central South Dakota. It is a summary of data gained in a pilot program for the development of a computerized farm financial information system. For this reason the data in this report cannot be interpreted as representative of all farms or areas in South Dakota. However, it can serve as a guide to those persons with farm operations similar to the ones included in this report. Data is presented in this report on the average of all farms participating in the record keeping activities. …

Financial Analysis South Dakota Farm Panel Records Program 1974, Herbert R. Allen, David Jibben

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

The data in this report have been obtained from a selected number of farms located in Central South Dakota. It is a summary of data gained in a pilot program for the development of a computerized farm financial information system. For this reason the data in this report cannot be interpreted as representative of all farms or areas in South Dakota. However, it can serve as a guide to those persons with farm operations similar to the ones included in this report. Data is presented in this report on the average of all farms participating in the record keeping activities. …

Labor Requirements In Beef Cow Herds, Herbert R. Allen, David Jibben

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

The cattle producer attempts to allocate and use scarce resources so as to maximize profits. Efficient use of labor is an important factor of production. It normally serves to lower production costs which frequently results in greater profits. The following report attempts to quantify the number of annual man hours necessary for different levels of efficiency in labor use with beef cow herds. Furthermore, this report figures the monthly percentages of total annual labor required at average efficiency for five different sizes of beef cow herds. Data for this report have been obtained from a survey of 160 farmers and …

1976 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International Agricultural Exposition Catalogs

No abstract provided.

James Valley Agricultural Research And Extension Center Annual Progress Report, 1976, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1976 progress report for the James Valley Agricultural Research and Extension Center. The reports in this document represent the research conducted at the Center during 1975. The report includes weather data, information on crop production, irrigation, soil reclamation, performance and variety test, and other experiments conducted at the Redfield, South Dakota Extension Center.

Conservation Tillage, Edward J. Williamson

SDSU Extension Circulars

Contents:

Wind Erosion Emergency Tillage

Know Your Soil: Your Soil is a Factory. Factory or Soil, Both Need Management. Plant Nutrient Storehouse.

Erosion Cuts New Return: Why Erosion Occurs-How to Prevent It.

Erosion Control Methods and Structures:Strip Cropping. Barrier Strips. Contouring. Terraces. Stubble Mulching. How Much Residue.

Cropping Practices and Rotations: Crops and Cropping Systems. Tillage--Good and Bad. Rotation System.

Machines, Costs and Returns: A Choice of Implements. Planning Your Program. Tillage Considerations. Seeding Equipment. Not Enough Residue? Too Much Residue?

Examples of Programs.

Characterization Of Cell-Cell Interactions In Normal And Tw32 Homozygous Preimplantation Mouse Embryos, Phyllis M. Johnson

Electronic Theses and Dissertations

Immediate objectives of the following studies were to characterize and compare normal versus lethal mutant (t^W32/t^W32) cellular interactions during preimplantation mouse development. Principal experimental methods used included embryo culture and microscopy. Control and mutant embryos were analyzed in vitro to identify chronological events and phenotypic characteristics of t^W32 homozygotes. Cell-cell associations of uncompacted and compacted 8-cell control (ICR) embryos were analyzed by quantitative electron microscopy. Lastly, light microscopic analyses were performed on control and mutant (t^W32/t^W32) morulae.

Growth, Reproduction And Blood Characteristics Of Hereford Females, Harold R. King

Electronic Theses and Dissertations

The objective of this experiment was to measure the effects of level of wintering nutrition and pasture treatment upon growth and reproduction of Hereford heifers from weaning to 4 1/2 years of age. Levels of certain blood constituents were determined at periodic intervals throughout the study as additional indicators of adequacy in intake for some major nutrients and for measures of general health of the animals. Data pertaining to weight and feed are reported in the English system, even though the metric system was used in the Review of Literature section. This was considered desirable in view of present common …

Purine-Thiamine Anabolism During Cellular Morphogenesis In Myxococcus Xanthus, Wen-Cherng Tsai

Electronic Theses and Dissertations

Purine-thiamine anabolism during cellular morphogenesis in Myxococcus xanthus was investigated. One of the approaches was to test vegetative and myxospore (2.5 h and 8 h) extracts of M. xanthus CW-2 for their ability to synthesize the second de novo intermediate, 5'-phosphoribosylglycinamide, from beginning precursors either by way of phosphoribosyl-pyrophosphate amidotransferase (EC 2.4.2.14) or ribose-5-phosphate aminotransferase. Results indicate the presence of both the amido- and aminotransferases in both types of extracts, and both enzymes appear to be present at about the same level (per milligram of protein) in vegetative cells, myxospores (2.5 h and 8 h), and in a bacterial prototype, …

Drip And Sprinkler Irrigation Of Carrots And Onions, James D. Melstad

Electronic Theses and Dissertations

Many specialty crops, especially vegetables, are shallow rooted and sensitive to periods of moisture stress. This makes irrigation of vegetables necessary to their production in South Dakota since summer rainfall is normally both inadequate and undependable. A study was initiated in conjunction with the South Dakota Agricultural Experiment Station and the Water Resources Institute to evaluate irrigation of specialty crops in eastern South Dakota. Drop and sprinkler irrigation were utilized for the irrigation of two specialty crops presently grown in South Dakota, carrots and onions. The study was initiated with the following objectives: 1. To compare carrots and onion yields …

Free Fatty Acids Associated With Induced Rancidity In Cream And Butter, John Alan Anderson

Electronic Theses and Dissertations

One of the most significant problems in the dairy industry today is the flavor defect known as rancidity. This defect has been recognized for some time, but recent trends in milk handling have increased the problem of rancidity. Recently the dairy industry on the farm has changed to the increased use of pipeline milkers and bulk handling of milk. Processing plants are becoming larger and more centralized, resulting in more movement over longer distances for the raw product. These changes result in increased foaming and agitation of the milk, contributing to the rancidity problem. The butter industry has changed. Butter …

Mathematical Models Of Postweaning Growth, Feed Intake And Carcass Composition Of Beef Cattle, Hoon Song

Electronic Theses and Dissertations

A computer model was developed to evaluate the energetic efficiency of postweaning beef production of various biological types of cattle fed rations with different energy densities. In Section I, a mathematical model was developed to estimate voluntary feed intake for growing cattle from weaning to slaughter. The mathematical model included effects of differences in energy density and crude fiber content of the ration and in breed and degree of maturity of cattle on feed intake. When gastrointestinal tract distension controlled feed consumption, the primary factors determining feed intake were (1) rate of excretion of digesta, (2) rate of digestion, (3) …

Physiologic And Embryologic Studies Of The Yellow (Ay/A) Mouse, Gerald R. Cizadlo

Electronic Theses and Dissertations

Mice heterozygous for the dominant AY gene have a yellow coat plus an altered metabolism which results in diverse physiologic characteristics including a greatly increased amount of carcass fat, a longer body and tail length, slightly more muscle mass, increased feed efficiency, increased susceptibility to spontaneous and induced tumor growth, and reproductive inefficiency in females. Homozygous AY animals die in utero. The mutation produces a lesion which is potentially valuable as an investigative· tool for the study of physiologic mechanisms and relationships of diverse metabolic pathways. Several experiments were performed to gain information concerning the AY effect. Rate of oxygen …

Detection Of Antibiotic Residues In Bovine Milk, Mark Edward Johnson

Electronic Theses and Dissertations

Under the Food, Drug, and Cosmetic Act antibiotics are considered as ·adulterants in milk and milk products. Cultured dairy products cannot be made with milk containing small concentrations -of antibiotics. Also, minute quantities of antibiotics cause allergic reactions in some people. Penicillin is the most common antibiotic to which people are allergic, and penicillin is also the most commonly used antibiotic in the treatment of infections in bovines. Antibiotics, whether injected intravenously or intramuscularly, or infused into the udder of the cow, can be secreted into the milk. It is for this reason that withdrawal times for milk from cows …

Intake And Digestibility Of Brown-Midrib Corn Silage By Lactating Dairy Cows, James Allen Rook

Electronic Theses and Dissertations

Two short-term trials evaluated brown-midrib-3 (bm₃) mutant (low lignin) corn silage for early lactation Holstein cows. In trial 1, five cows per group were individually fed a ration of silage and grain (60:40 ratio, dry matter basis) from week 2 through 8 of lactation. Lignin percentages for bm₃ and normal silages were 4.9 and 6.4. Cattle fed the bm₃ ration consumed 19% more total dry matter as percent of body weight than cows fed normal. Digestibilities of dry matter, cell-wall contents, acid detergent fiber, and energy were 3 to percentage units higher for the bm_{3 …}

A Study Of Milk Composition In South Dakota, Jeng-Jung Yee

Electronic Theses and Dissertations

The composition of cow's milk, including both the fat and solids-not-fat (SNF) content, is known to vary over rather broad ranges. Breed and individuality of the cow are the major factors influencing this, but many other factors are known to exert their influence. However, it has generally been observed that compensation or complementing occurs when the milk of cows is mixed together; so that the composition of milk from a herd will tend toward averages or norms. This effect usually is even more marked as the milk from two or more herds is commingled. Payment for milk on the basis …

Heterospermic Insemination In Swine, Donald G. Levis

Electronic Theses and Dissertations

The studies report herein were conducted to evaluate (1) if there is a difference in pregnancy rate and litter size in swine between heterospermic and homospermic inseminations, (2) the effect of mixing various fresh cm n components involving spermatozoa in the sperm-rich fraction, seminal plasma from the centrifuged post-sperm fraction and Beltsville Ll extender on oxygen consumption, pH, motility and percent dead spermatozoa and (3) the effect of storage (54 hours) on oxygen consumption, pH, motility and percent dead spermatozoa in the various combinations. One Hampshire and one Yorkshire boar were used in the pregnancy rate and litter size study.