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Articles 1 - 30 of 57
Full-Text Articles in Life Sciences
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1986, Agricultural Experiment Station, Plant Science Department
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1986, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1986 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1986 crop season, climate data applications of chloride for wheat, spring wheat breeding, oats research, barley and rye testing, grain trials, corn breeding row spacing, sunflower studies and trials, and weed control.
West River Agricultural Research And Extension Center Progress Report, 1986, Agricultural Experiment Station
West River Agricultural Research And Extension Center Progress Report, 1986, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1986 annual progress report of the West River Crops Soils Research and Extension Center, South Dakota Agricultural Experiment Station. This report includes: a weather summary for all west river counties involved in research, small grain variety trials, information on oilseed crops, edible crops, forage crops, management, tillage and cultural practices, and numerous weed control research projects.
Southeast South Dakota Experiment Farm Annual Progress Report, 1986, Agricultural Experiment Station
Southeast South Dakota Experiment Farm Annual Progress Report, 1986, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This twenty-sixth 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 production and performance, soybean research and planting, soil testing, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock, and pest and weed control.
Mixed Integer Linear Programming Model Electric Rate Structure-Irrigation Study: Clay-Union, Union, Cherry-Todd, And Cam-Wal Recs, Donald Taylor, Todd A. Lone, Ardelle A. Lundeen
Mixed Integer Linear Programming Model Electric Rate Structure-Irrigation Study: Clay-Union, Union, Cherry-Todd, And Cam-Wal Recs, Donald Taylor, Todd A. Lone, Ardelle A. Lundeen
Economics Research Reports
This is the second in a series of five Economics Department reports on a research project. "The Economic Impact of Alternative Electric Rate Structures on Energy and Water Use". sponsored by the South Dakota Agricultural Experiment Station. Supplemental funding for the research was provided by the Western Area Power Administration (WAPA). Golden. Colorado. The purpose of this report is to acquaint the reader with the overall model used in the study and the specific way that the electric rate structures were modeled. This model builds on. b~t goes beyond. the one developed and used by Robert A. Young and. associates …
Enterprise Budgets And Other Basic Data-Sets Electrical Rate Structure-Irrigation Study, Donald Taylor, Todd A. Lone, Ardelle A. Lundeen
Enterprise Budgets And Other Basic Data-Sets Electrical Rate Structure-Irrigation Study, Donald Taylor, Todd A. Lone, Ardelle A. Lundeen
Economics Research Reports
This is the first in a series of five Economics Department reports on a research project. "The Economic Impact of Alternative Electric Rate Structures on Ener~y and Water Use". sponsored by the South Dakota Agricultural Experiment Station. Supplemental funding for the research was provided by the Western Area Power Administration (WAPA). Golden. Colorado. The purpose of this report is to present the irrigated and dryland crop and livestock budgets and other basic-data sets developed for use in the study. The sources of underlying information and procedures for developing the various data sets are indicated. Emphasis is placed on describing what …
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm and Home Research: 1949 -1998
Director’s Comment [p] 2
Agricultural Engineering [p] 3
Animal and Range Sciences [p] 6
Biology [p] 10
Diary Science [p] 12
Economics [p] 15
Home Economics [p] 17
Horticulture, Forestry, landscape and Parks [p] 19
Microbiology [p] 21
Plant Science [p] 24
Rural sociology [p] 28
Station Biochemistry [p] 30
Veterinary science [p] 32
Wildlife and fisheries Sciences [p] 34
99th Annual report [p] 37
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm and Home Research: 1949 -1998
Director’s Comment: A south Dakota wheat line may be answer to Hessian fly in Morocco [p] 2
Woodies go ‘beep’: Wood ducks that talk to us have a clear message: oxbows are best nurseries around [p] 3
Lifestyle: clue to obesity?: Over half in survey said they were overweight; we cooperate in two-state search for causes [p] 6
Wheat: the checkoff: It’s an R7D’ program, an investment in our future, that’s been shown to pay off [p] 11
Wheat: the package: A new wheat means ‘maybe a profit,’ unproven until grower adds ‘other 50%’ of the package [p] 13
Alternative …
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm And Home Research, South Dakota State University
South Dakota Farm and Home Research: 1949 -1998
Director’s Comment: Thirteen citizen’s-your neighbors-will set our goals. Help them out [p] 2
Keep oats clean: No racehorse premium, dockage, even refusal at the elevator if oats carry live insects [p] 3
McCrory Gardens facelift: Added attractions coming to garden that has already attracted worldwide acclaim [p] 6
Shared goals: Seedsmen and SDSU are partners in research and education acreage east of Brookings [p] 10
New: a chloride test: SDSU is first land=grant lab to make the recs; chloride mat boost your wheat yields [p] 12
More sheep, more disease: Scientists have become sleuths, tracking down elusive ‘villain’ in sheep …
1986 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
1986 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International Agricultural Exposition Catalogs
No abstract provided.
Risk Management And Marketing, Gene Murra
Risk Management And Marketing, Gene Murra
South Dakota Beef Report, 1986
Some risk can be transferred to someone else, some may have to be retained by the producer. Price risk is one type of risk which can be shifted to someone else. The cash market method of pricing keeps the risk in the hands of the producer. Often, that means that risk is not managed, just accepted as part of doing business. The forward pricing techniques--cash forward pricing, futures market and options--offer some opportunity to manage price risk by shifting some of that risk to someone else. Merely shifting price risk to someone else doesn't necessarily mean either more profits or …
Cash Settlement For Feeder Cows, Gene Murra
Cash Settlement For Feeder Cows, Gene Murra
South Dakota Beef Report, 1986
The change in the feeder cattle futures contract from physical delivery t o cash settlement should not affect a producer's net price for his feeder cattle. For those producers who hedge or use the cash forward contract. the main impact is in the basis. Now, a smaller basis (by about $3) should be used compared to what the producer used prior to cash settlement. Under the old delivery procedure. once a producer used the futures market as a hedge (sold a futures contract), there were two alternatives--either buy back the contract or delivery. If the contract was not "bot" back …
Profitability Of Feeding Cull Cows, Richard Shane, Wayne Ellington
Profitability Of Feeding Cull Cows, Richard Shane, Wayne Ellington
South Dakota Beef Report, 1986
The seasonal price pattern exhibited in the South Dakota cull cow market is one of low prices in the fall when most culling is done with increasing prices well into the following year. This pattern supports the assertion that cattle producers may improve profitability of their operations by feeding cull cows for several months rather than selling immediately at culling time. A dynamic programming model was used to determine the optimal strategy for marketing cull cows in South Dakota. The model systematically evaluated the sell now versus the hold and maintain or feed for gain strategies of the producer. Results …
South Dakota Custom Feeding Program, J.J. Wagner
South Dakota Custom Feeding Program, J.J. Wagner
South Dakota Beef Report, 1986
Seventy-five preconditioned steer calves representing 14 different owners and a variety of breeds were placed on feed at Longacre Farms. Wentworth. South Dakota. in late November and early December. Average days on feed for the 15 groups of five head was 191 (range 181-2071. Average daily gain was 2.6 lb head per day (range 2.26-2.83). Feed efficiency was 8.2 lb dry matter per pound of gain. Feed cost averaged $35.53 per cwt. gain and nonfeed cost averaged $11.84 per cwt. gain. Average cost of gain excluding interest was $47.37 per cwt. (range 43.16-53.741. Average loss was $85.00 per head (range …
Respiratory Viruses And Antibodies In Preconditioned South Dakota Feeder Calves, M.L. Vickers, R.H. Pritchard
Respiratory Viruses And Antibodies In Preconditioned South Dakota Feeder Calves, M.L. Vickers, R.H. Pritchard
South Dakota Beef Report, 1986
Nasal swabs and blood samples were taken from a t o t a l of 400 calves on a preconditioning evaluation program during 2 years. Fifty calves from each of four South Dakota ranches were divided into preconditioned (PC) and control (CO) groups and sampled both on the ranch and in the feedlot. The preconditioning program followed the recommendations of the South Dakota Beef Cattle Improvement Association and the Extension Service and included vaccination with live virus vaccines for infectious bovine rhinotracheitis (IBR), bovine viral diarrhea (BVD) and parainfluenza-3 virus (PI3). In both years, viruses were isolated from calves on …
Mechanical Treatment And Burning For High Quality Range Forage, F.R. Gartner, E.M. White, R.I. Butterfield
Mechanical Treatment And Burning For High Quality Range Forage, F.R. Gartner, E.M. White, R.I. Butterfield
South Dakota Beef Report, 1986
Annual yields of western wheatgrass and total vegetation were increased on a clayey range site following mechanical treatment. More important to the range manager, year t o year variability in forage production was reduced, since soil moisture is stabilized. Yields of Japanese brome, an annual grass, increased from the second through the fourth growing seasons after treatment. Three consecutive years of abundant fall precipitation beginning in 1980 probably triggered seed germination of this invader plant. Prescribed burning of the mechanical range treatments drastically reduced production of Japanese brome and increased forage quality. Both quantity and quality of western wheatgrass increased …
Pricklypear Cactus Control In Western South Dakota, J.R. Johnson, W.L. Tucker, C.E. Stymiest, E.J. Bowker
Pricklypear Cactus Control In Western South Dakota, J.R. Johnson, W.L. Tucker, C.E. Stymiest, E.J. Bowker
South Dakota Beef Report, 1986
In a range improvement study, both liquid and pelleted forms of Picloram were effective in controlling pricklypear cactus. Higher rates of chemical hastened control and gave more complete control. At lower rates, cactus was recovering in 1985, the fourth year of study, suggesting that higher rates may be most cost effective. In 1983 noncactus vegetation response was minor. In 1984, "all perennial grass" production increased by more than 50% (312 lb/A) at higher rates of Picloram. Shifts in "cool season" and “warm season" grass components were nonsignificant. In 1985, "cool season grass" was not generally affected by treatments, but "warm …
Effects Of Body Condition On Reproductive Performance Of Beef Cows, P.A. Momont, R.J. Pruitt
Effects Of Body Condition On Reproductive Performance Of Beef Cows, P.A. Momont, R.J. Pruitt
South Dakota Beef Report, 1986
Cows were fed differing nutritional levels before and after calving to create a wide range of cow body condition or fleshiness prior t o calving and at the beginning of the breeding season. Cows that were fleshier prior t o calving and when turned on pasture in early May (30 days prior t o the beginning of the breeding season) had a higher cycling rate in early May, June and July. Cows maintaining or increasing slightly in body condition (precalving to early May) tended to have a higher cycling rate during the breeding season than cows which lost body condition …
Effects Of Bull Exposure On Postpartum Intervals And Reproductive Performance In Beef Cows: A Progress Report, C.D. Naasz, H.L. Miller, B.A. Petijean, R.H. Haigh
Effects Of Bull Exposure On Postpartum Intervals And Reproductive Performance In Beef Cows: A Progress Report, C.D. Naasz, H.L. Miller, B.A. Petijean, R.H. Haigh
South Dakota Beef Report, 1986
The effects of bull exposure on time from calving until estrus, conception rates and calving interval were studied for mature beef cows. In the spring of I985 and 1986, cows were randomly allotted to one of two treatment groups. Cows were exposed to vasectomized bulls after calving until breeding or no bull exposure. Cows were heat detected twice daily and blood samples were collected weekly to determine progesterone levels. Heat detection data and progesterone levels indicated onset of estrous cycles occurred earlier in bull exposed cows than non-exposed cows. Conception rates to a timed insemination were not different between the …
Flow Cytometry Evaluation Of Testis And Sperm Cells And Growth Performance Of Bulls Implanted With Zeranol, B.E. Ballachey, H.L. Miller
Flow Cytometry Evaluation Of Testis And Sperm Cells And Growth Performance Of Bulls Implanted With Zeranol, B.E. Ballachey, H.L. Miller
South Dakota Beef Report, 1986
Effects of preweaning zeranol implants on reproductive function and growth performance were studied in 45 Simmental-Angus bulls. At slaughter, flow cytometry measurements were made on testicular and sperm cells to determine the effects of zeranol on spermatogenesis. There were no differences in weaning or slaughter weights due to implants. Nonimplanted bulls had larger scrota1 circumferences and heavier testicular weights than bulls given one or two implants. The testes of implanted bulls had a lower proportion of developing germ cells relative to nonimplanted bulls. The DNA in sperm from implanted bulls was structurally less stable (i.e., more susceptible to denaturation) than …
Evaluation Of Holstein Bull Sperm Quality By Flow Cytometry, B.E. Ballachey, L.K. Jost, D.P. Evenson
Evaluation Of Holstein Bull Sperm Quality By Flow Cytometry, B.E. Ballachey, L.K. Jost, D.P. Evenson
South Dakota Beef Report, 1986
Frozen semen samples from Holstein bulls were measured by the sperm chromatin structure assay (SCSA), a new procedure utilizing flow cytometry for the valuation of sperm quality. Fertility ratings of the bulls were known based on their use in artificial insemination matings. Values obtained by the SCSA were highly correlated (r= -.58 P<.01 with bull fertility ratings. Results of this research indicate the SCSA may be a valuable technique for measurement of sperm cell quality and detection of suboptimal fertility in bulls.
Performance Of Flank Spayed Rumen Autografted Heifers, David L. Whittington
Performance Of Flank Spayed Rumen Autografted Heifers, David L. Whittington
South Dakota Beef Report, 1986
Flank spaying of intact yearling heifers has been a routine procedure for ranchers for several years. Most recently a new technique called rumen autografting has created a lot of interest with ranchers. The technique involves implanting or grafting a small piece of ovarian tissue into the outside lining of the rumen wall. A trial was initiated on May 14, 1986, to compare summer grazing performance of intact flank spayed and rumen autografted heifers with and without a growth implant. The 231 crossbred heifers were randomly allotted to the trial and grazed together for 99 days as one herd. The results …
Effects Of Anabolic Implants On Reproductive Function, Carcass Characteristics And Performance In Postweaned Beef Bulls, S.J. Gordon, H.L. Miller, D.H. Gee, B.A. Petithean
Effects Of Anabolic Implants On Reproductive Function, Carcass Characteristics And Performance In Postweaned Beef Bulls, S.J. Gordon, H.L. Miller, D.H. Gee, B.A. Petithean
South Dakota Beef Report, 1986
Angus bulls averaging 620 lb were used to study the effects of implants on performance, carcass characteristics and reproductive parameters of intact males. Sixty-six bulls were randomly assigned to four treatments. These treatments were (1) nonimplanted, (2) implanted with 36 mg of Ralgro every 60 t o 70 days, (3) implanted with 220 mg of Synovex-S every 60 t o 70 days, (4) implanted with 24 mg of Compudose every 180 days. Body weights were taken a t the initiation of the trial and every 28 days. Blood samples were collected v i a jugular venipuncture weekly for 9 weeks …
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Yearling Steers, D.L. Whittington
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Yearling Steers, D.L. Whittington
South Dakota Beef Report, 1986
Growth response to a single implant was measured in yearling steers grazing native range on two ranches in South Dakota. The steers (724 head) were randomly allotted on each ranch to either a Ralgro, Compudose, Synovex-S or no implant treatment. Implants were administered according to manufacturers recommendations. The yearlings were weighed at the time of implanting in the spring and again 116 t o 148 days later. The ears of the steers receiving Compudose were palpated at the end of the trial to determine retention. The weight advantage of implanted steers over controls ranged from 12.1 t o 30.1 lb. …
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Suckling Calves, D.L. Whittington
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Suckling Calves, D.L. Whittington
South Dakota Beef Report, 1986
Growth response to a single implant was measured in suckling steer and heifer calves grazing native range on three ranches in South Dakota, The steers (628 head) were randomly allotted on each ranch to either a Ralgro, Compudose, Synovex-C or no implant treatment. The heifers (714 head) were randomly allotted on each ranch to either a Ralgro, Synovex-C or no implant treatment. Implants were administered according to manufacturers' recommendations. The calves were weighed at the time of implanting and again 163 days later at weaning. The ears of steers receiving a Compudose implant were palpated at weaning to determine retention. …
Effectiveness Of Albendazole Against Parasites And Cow And Calf Performance, H.L. Miller, J. Berthelsen, B.A. Petitjean, R.H. Haigh
Effectiveness Of Albendazole Against Parasites And Cow And Calf Performance, H.L. Miller, J. Berthelsen, B.A. Petitjean, R.H. Haigh
South Dakota Beef Report, 1986
Albendazole was utilized in drench and feed additive form to determine its effectiveness against parasite control, cow weight and conception rate and calf weaning weights. Fecal oocyte number was decreased by administration of Albendazole. Calf weaning weights from treated cows were heavier the first two years (14.5 lb for heifers and 10.5 lb for bulls) but decreased the third year (13 lb and 6 lb for heifers and bulls, respectively). Conception rates were similar between the two groups, with the only difference occurring the third year when control cows had a higher conception rate from the second AI than treated …
Determination Of An Optimal Single Dose Of Famphur Administered Om Combination With Levamisole In A Paste Formulation For Grub Control In Beef Calves, H.L. Miller, R.L. Delay, R. Haigh
Determination Of An Optimal Single Dose Of Famphur Administered Om Combination With Levamisole In A Paste Formulation For Grub Control In Beef Calves, H.L. Miller, R.L. Delay, R. Haigh
South Dakota Beef Report, 1986
Eighty-nine bull and heifer crossbred beef calves were utilized in five treatments t o determine the effect of famphur administered as a paste for grub control. The five treatments were (1) experimental paste-0% famphur or control (A), (2) experimental paste-14.4% famphur (B), (3) experimental paste-21.6X famphur (C), (4) experimental paste-28.8% famphur (Dl and (5) Warbex famphur pour-on plus tramisol levamisole gel (El. In all treatments in which famphur was administered (B, C, D and E) effective control of grubs was accomplished. Weight gains were 355, 360, 384, 355 and 356 lb for bulls in groups A, B, C. D and …
The Status Of Horn Fly Resistance In South Dakota, Emmert R. Easton
The Status Of Horn Fly Resistance In South Dakota, Emmert R. Easton
South Dakota Beef Report, 1986
Ear tags containing the organophosphate insecticide chlorpyrifos have been effective in the control of resistant horn flies in three western South Dakota localities during 1986. Resistance levels of 50-fold to pyrethroid insecticide were detected in horn fly populations at Cottonwood, Colome and Sturgis.
The Release Of Insects Sterilized By Colbalt 60 To Control A Wild Population Of Stable Flies At The Sdsu Beef Cattle And Sheep Nutrition Unit In Brookings, Emmert R. Easton, Michael A. Catangui
The Release Of Insects Sterilized By Colbalt 60 To Control A Wild Population Of Stable Flies At The Sdsu Beef Cattle And Sheep Nutrition Unit In Brookings, Emmert R. Easton, Michael A. Catangui
South Dakota Beef Report, 1986
Sterile stable flies were released weekly a t the SDSU Beef Cattle and Sheep Nutrition Unit at Brookings from July 24 through September during the summer 1986 season t o eliminate wild populations of insects. Flies that were sterilized were marked with a dye so when recaptured by an insect net or a sticky trap they could be differentiated from wild, normal or fertile flies. A trend toward reduced f l y numbers was observed 3 weeks following the first release. A 1:5 ratio of sterile to wild flies was achieved in 6 weeks.
The Fly Buster. A Combination Mineral Feeder/Spray Device For The Control Of The Horn Fly And The Face Fly On Pastured Cattle, Emmert R. Easton
The Fly Buster. A Combination Mineral Feeder/Spray Device For The Control Of The Horn Fly And The Face Fly On Pastured Cattle, Emmert R. Easton
South Dakota Beef Report, 1986
A combination mineral feeder/spray device was evaluated as a different approach for the suppression of horn and face flies under range conditions in east central South Dakota during the 1985 season. Ravap, Ectrin and Ciovap were applied at the rates of 1.25. .05 and 1.0%, respectively, to Black Angus cattle in three separate pastures with the spray device containing Morton's Farm and Ranch T-M and salt containing iodine and other trace minerals. Cattle in a fourth pasture that were not treated were used as the control. A canister containing Freon 12 acts as a propellant to force the insecticide under …
Effects Of Preconditioning On Pre- And Postshipment Performance And Health Of Feeder Steers, J.K. Swann, R.H. Pritchard, M.A. Robbins
Effects Of Preconditioning On Pre- And Postshipment Performance And Health Of Feeder Steers, J.K. Swann, R.H. Pritchard, M.A. Robbins
South Dakota Beef Report, 1986
Four hundred steer calves were used to determine the effect of preconditioning on performance and health of calves fed either a high or low energy diet. In each of 2 years, 200 steer calves were selected from four western South Dakota ranches to participate in the study. Preconditioned (PC) calves were treated according to the South Dakota Beef Cattle Improvement Association and Cooperative Extension Service's guidelines for the "Green Tag" program. Preconditioning and implanting with zeranol produced a heavier calf at market time. No difference in weight loss during transit was noted between the PC and control treatments (CO), but …