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Articles 61 - 72 of 72
Full-Text Articles in Agriculture
Light-Test Weight Corn For Growing And Finishing Steers, B. A. Weichenthal, Ivan G. Rush, B. G. Van Pelt
Light-Test Weight Corn For Growing And Finishing Steers, B. A. Weichenthal, Ivan G. Rush, B. G. Van Pelt
Panhandle Research and Extension Center
Light-test weight corn (59.2 to 61.5 kg/hL; 46 to 48 lb/bu) was compared to normal corn (72 kg/hL; 56 lb/bu) in growing and finishing diets for largeframe crossbred steer calves in 2 consecutive yr. The source of the calves was the same each year as was the diet composition. Growing diet dry matter included 32.9% corn silage, 22.3% alfalfa haylage, 37% dry rolled corn, and 7.8% protein supplement. Finishing diet dry matter included 9.2% corn silage, 86.2% dry rolled corn, and 4.6% protein supplement. Rumensin was included in both diets and steers were implanted with Synovex Sâ at the start …
Mixed Infection Of Hard Red Winter Wheat With High Plains Virus And Wheat Streak Mosaic Virus From Wheat Curl Mites In Nebraska, T. Mahmood, Gary L. Hein, S. G. Jenson
Mixed Infection Of Hard Red Winter Wheat With High Plains Virus And Wheat Streak Mosaic Virus From Wheat Curl Mites In Nebraska, T. Mahmood, Gary L. Hein, S. G. Jenson
Panhandle Research and Extension Center
A new disease of wheat and corn caused by the High Plains virus (HPV) has been observed in the High Plains region of western United States. HPV is transmitted by the wheat curl mite, Aceria tosichella, which is also the vector of wheat streak mosaic virus (WSMV). In the field it is extremely difficult to visually differentiate plants infected with WSMV from those with HPV. An indirect protein-A sandwich enzyme-linked immunosorbent assay (PAS-ELISA) and Western blot analysis were used to identify WSMV and HPV. Samples of wheat curl mites were collected from arbitrarily chosen sites from commercial wheat plantings …
Light-Test Weight Corn For Growing And Finishing Steers1, B. A. Weichenthal, I. G. Rush, B. G. Van Pelt
Light-Test Weight Corn For Growing And Finishing Steers1, B. A. Weichenthal, I. G. Rush, B. G. Van Pelt
Panhandle Research and Extension Center
Light-test weight corn (59.2 to 61.5 kg/hL; 46 to 48 lb/bu) was compared to normal corn (72 kg/hL; 56 lb/bu) in growing and finishing diets for largeframe crossbred steer calves in 2 consecutive yr. The source of the calves was the same each year as was the diet composition. Growing diet dry matter included 32.9% corn silage, 22.3% alfalfa haylage, 37% dry rolled corn, and 7.8% protein supplement. Finishing diet dry matter included 9.2% corn silage, 86.2% dry rolled corn, and 4.6% protein supplement. Rumensin was included in both diets and steers were implanted with Synovex Sâ at the start …
Development Of Serological Procedures For Rapid And Reliable Detection Of Wheat Streak Mosaic Virus In A Single Wheat Curl Mite, T. Mahmood, Gary L. Hein, Roy C. French
Development Of Serological Procedures For Rapid And Reliable Detection Of Wheat Streak Mosaic Virus In A Single Wheat Curl Mite, T. Mahmood, Gary L. Hein, Roy C. French
Panhandle Research and Extension Center
Wheat streak mosaic virus (WSMV) is transmitted by the wheat curl mite (WCM), Aceria tosichella. Immunofluorescent and dot-immunobinding assays were developed to detect the presence of WSMV in single WCM. Virus-specific immunofluorescent microscopy detected WSMV near the anterior end of viruliferous WCM. With dot-immunobinding assay, WSMV was detected in WCM fed on WSMV-infected wheat (Triticum aestivum) but not in WCM maintained on healthy plants. Both immunofluorescent and dot-immunobinding assays were sufficiently sensitive to detect WSMV in individual WCM, providing a means to determine the percentage of viruliferous WCM in field collections.
Intake And Digestion Of Low-Quality Meadow Hay By Steers And Performance Of Cows On Native Range When Fed Protein Supplements Containing Various Levels Of Corn, D. W. Sanson, D. C. Clanton, Ivan G. Rush
Intake And Digestion Of Low-Quality Meadow Hay By Steers And Performance Of Cows On Native Range When Fed Protein Supplements Containing Various Levels Of Corn, D. W. Sanson, D. C. Clanton, Ivan G. Rush
Panhandle Research and Extension Center
Two trials were conducted to evaluate the effects of corn in protein supplements fed to cattle receiving low-quality forages. In Trial 1, four ruminally cannulated steers (avg BW 550 kg) and four intact steers (avg BW 270 kg) were used in a replicated latin square to determine intake and digestibility of a low-quality meadow hay (4.3% CP) when fed no supplement (NS), 1.12 g CP/kg BW (PS), 1.12 g CP/kg BW with corn supplying 1.98 g starch/kg BW (PLC) or 1.12 g CP/kg BW with corn supplying 3.96 g starch/kg BW (PHC). Hay DM1 decreased (P = .001) and …
Protein Supplementation Of Ammoniated Roughages. Ii. Wheat Straw Supplemented With Alfalfa, Blood Meal Or Soybean Meal Fed To Wintering Steers, M. L. Nelson, Ivan G. Rush, T. J. Klopfenstein
Protein Supplementation Of Ammoniated Roughages. Ii. Wheat Straw Supplemented With Alfalfa, Blood Meal Or Soybean Meal Fed To Wintering Steers, M. L. Nelson, Ivan G. Rush, T. J. Klopfenstein
Panhandle Research and Extension Center
Two winter steer growth trials were conducted to investigate responses of steer calves to ammoniation of wheat straw, level of alfalfa haylage (50 or 66.7% of diet) and source of supplemental protein, soybean meal (SBM), blood meal (BM), or a blood meal-urea mixture (BM-U). In trial 1, the main effect of arnmoniation significantly increased average daily gain (ADG) from .15 to .24 kg/d, dry matter intake (DMI) from 4.86 to 5.29 kg/d and gain/feed from .029 to .044. The higher level of alfalfa haylage significantly increased DMI from 4.78 to 5.36 kg/d. Gain during a subsequent grazing period was unaffected …
Effect Of Monensin, Estradiol Controlled Release Implants And Supplement On Performance In Grazing Steers, J. F. Wagner, H. Brown, N. W. Bradley, W. Dinusson, W. Dunn, N. Elliston, J. Miyat, D. Mowrey, J. Moreman, L. C. Pendlum, C. Parrott, L. Richardson, Ivan G. Rush, H. Woody
Effect Of Monensin, Estradiol Controlled Release Implants And Supplement On Performance In Grazing Steers, J. F. Wagner, H. Brown, N. W. Bradley, W. Dinusson, W. Dunn, N. Elliston, J. Miyat, D. Mowrey, J. Moreman, L. C. Pendlum, C. Parrott, L. Richardson, Ivan G. Rush, H. Woody
Panhandle Research and Extension Center
Five trials in five locations in the United States involving 512 steers were conducted to evaluate the effect of monensin [200 mg/d in .9 kg of supplement (Rumensin)] and estradiol- controlled release implants (Compudose) administered alone and in combination on average daily gain (ADG) in steers on pasture. The effect of energy supplementation on rate of gain was also evaluated in these same trials. The initial weight of steers averaged 250 kg and the average duration of the five trials was 124 d. Estradiol-controlled release implants increased ADG by 15.6% (.095 kg/d; P<.0001) and monensin increased ADG by 8.1% (.054 kg/d; P<.05). The combination of estradiol-controlled release implant and monensin increased ADG by 27.4% (.I68 kg/d). Treatment responses were additive relative to ADG response, with no interaction observed between the treatments. Nine-tenths kilogram of an energy supplement/d increased ADG by 12.4% (.073 kg/d; P<.Ol).
Chemical Treatment Of Wheat Straw, Gary Lesoing, Terry Klopfenstein, Ivan G. Rush, John Ward
Chemical Treatment Of Wheat Straw, Gary Lesoing, Terry Klopfenstein, Ivan G. Rush, John Ward
Panhandle Research and Extension Center
An in vitro digestion study, a lamb growth trial and a lamb digestion trial were conducted to evaluate the effect of different NaOH and Ca(OH)2 treatments on the energy availability of wheat straw. In vitro dry matter disappearance (IVDMD) of wheat straw was increased 29% by chemical treatment with 1% NaOH plus 3% Ca(OH)2 and by as much as 86% by a 4% NaOH plus 1% Ca(OH)2 treatment. A significant amount of hemicellulose was solubilized by chemical treatment with NaOH and Ca(OH)2, but little cellulose was solubilized. Rate and extent of both hemicellulose and cellulose digestion of …
Wheat Straw In Growing Cattle Diets, Gary Lesoing, Ivan G. Rush, Terry Klopfenstein, John Ward
Wheat Straw In Growing Cattle Diets, Gary Lesoing, Ivan G. Rush, Terry Klopfenstein, John Ward
Panhandle Research and Extension Center
Three cattle growth trials were conducted to evaluate the use of untreated and alkali-treated wheat straw as energy sources for ruminants. In trial 1, daily gain decreased as level of untreated wheat straw increased in the diet. A 14% decrease in gain occurred when the level of straw was increased from 30 to 40% of the diet. In trial 2, cattle fed 4% NaOH-treated wheat straw at the 30 or 60% level had better daily gains and feed efficieneies (Pvs. .54 kg/day). In addition, in this trial, cattle fed 50% treated wheat straw gained faster (Pvs. .62 kg/day).
Wheat Straw And Sodium Hydroxide Treatment In Beef Cow Rations, C. W. Acock, J. K. Ward, Ivan G. Rush, T. J. Klopfenstein
Wheat Straw And Sodium Hydroxide Treatment In Beef Cow Rations, C. W. Acock, J. K. Ward, Ivan G. Rush, T. J. Klopfenstein
Panhandle Research and Extension Center
Two cow drylot wintering trials and a lamb digestion trial were conducted to evaluate wheat straw in maintenance diets for gestating beef cows. Wheat straw or sodium hydroxide (NaOH) treated wheat straw, when fed ad libiturn with one-third alfalfa hay, supported gestating cow weight gains equivalent to a limitfed alfalfa-bromegrass diet. Cows fed NaOH treated wheat straw supplemented with soybean meal and minerals gained less weight (P<.01) than cows on the other treatments. Calf birth weights, calving difficulty and subsequent reproductive performance of the cows were similar for all treatments. Apparent digestibility of wheat straw was increased (P<.01) by 4% NaOH treatment in a lamb digestion trial but was not altered by balancing the sodium intake with other specific minerals. The increase in digestibility of wheat straw due to NaOH treatment was greater in vitro than in vivo.
Supplemental Value Of Feed Grade Biuret And Urea-Molasses For Cows On Dry Winter Grass, Ivan G. Rush, Robert Totusek
Supplemental Value Of Feed Grade Biuret And Urea-Molasses For Cows On Dry Winter Grass, Ivan G. Rush, Robert Totusek
Panhandle Research and Extension Center
Four trials were conducted to evaluate the supplemental value of feed grade biuret (in dry supplements) and urea (in liquid urea-molasses mixtures) when compared to natural protein and urea in dry supplements for beef cows grazing low quality dry winter range grass. Urea or feed grade biuret provided 50% of the nitrogen in 30% CP dry supplements and urea provided 50% of the nitrogen in 30% CP dry supplements and urea provided 94% of the nitrogen in 30% CP liquid supplements. Dry supplements were self-fed with salt added to limit intake.
Winter weight loss of cows fed dry urea-containing supplements …
Evaluation Of Beef Cattle Range Supplements Containing Urea And Biuret, Ivan G. Rush, R. R. Johnson, Robert Totusek
Evaluation Of Beef Cattle Range Supplements Containing Urea And Biuret, Ivan G. Rush, R. R. Johnson, Robert Totusek
Panhandle Research and Extension Center
Two winter trials were conducted with 304 lactating range cows on dry grass to evaluate non-protein-nitrogen (NPN) in 30% protein supplements containing biuret (pure and feed grade), urea and extruded grain-urea. The NPN sources contributed one-half of the supplemental nitrogen with natural 15 and 30% protein supplements serving as negative and positive controls.
Winter weight loss of cows was greater (P~.02) on the negative than on the positive control in both trials. The apparent utilization of all NPN sources was low and the utilization of urea and extruded grain-urea was less than pure or feed grade biuret. Rumen biuretolytic activity …