Josh Davy
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View article: Investigating Supplementation with Asparagopsis taxiformis in Mineral to Reduce Enteric Methane from Grazing Cattle
Investigating Supplementation with Asparagopsis taxiformis in Mineral to Reduce Enteric Methane from Grazing Cattle Open
While methane emissions from cattle contribute to greenhouse gases, supplementing with red seaweed Asparagopsis taxiformis (AT) demonstrates an up to 90% methane reduction in controlled feeding studies. However, methods for delivery of AT …
View article: Effectiveness of herbicide control methods for coyote brush on the North Coast of California
Effectiveness of herbicide control methods for coyote brush on the North Coast of California Open
Coyote brush is a native shrub common on California coastal prairies. It is largely unpalatable to cattle and is an aggressive encroacher on open prairies; as such, it is a threat to livestock production on some of California’s most produc…
View article: Gastrointestinal parasitic worm burdens and efficacy of deworming practices in growing beef cattle grazing California pastures
Gastrointestinal parasitic worm burdens and efficacy of deworming practices in growing beef cattle grazing California pastures Open
Treatment for enteric parasites is a common practice in beef cattle, yet little data is known about the prevalence of nematode and trematode parasite infections in beef cattle in the western United States. Likewise, the data on the efficac…
View article: Monensin supplementation increases weight gain in stocker steers, but higher doses reduce essential mineral intake
Monensin supplementation increases weight gain in stocker steers, but higher doses reduce essential mineral intake Open
Monensin is known to improve feed efficiency in cattle. At higher doses, however, monensin reduces the palatability of mineral supplements, which may reduce consumption of essential minerals such as selenium. The main objective of this stu…
View article: Improving the feeding value of rice straw
Improving the feeding value of rice straw Open
For rice producers, removing straw from a field after harvest is important because the material is slow to break down and needs to be gone prior to planting the next season. One option is to bale the straw and use it as a forage supplement…
View article: Comparison of deworming strategies for pre-weaned beef calves
Comparison of deworming strategies for pre-weaned beef calves Open
While anthelmintic treatment in young calves at first vaccination has not proven repeatedly effective in improving weight gain, there is evidence that treatment 90 day prior to weaning can enhance weight gain. This is difficult in most Cal…
View article: Managing Small Ruminant Nutrition in Chaparral
Managing Small Ruminant Nutrition in Chaparral Open
C haparral is a fire-prone shrubland plant community that grows across roughly 7 million acres of coastal and inland California (Quinn and Keeley 2006).It ranges from the northern to the southern end of the state.Wildfires in chaparral can…
View article: Estimating Reduction in Standing Crop Biomass from California Ground Squirrels in Central California Rangelands
Estimating Reduction in Standing Crop Biomass from California Ground Squirrels in Central California Rangelands Open
California ground squirrels (Otospermophilus spp.) cause more economic damage to California rangelands than any other rodent. Damage comes in many forms, although forage loss is typically the greatest concern. These losses are believed to …
View article: Russian thistle (<i>Salsola</i> spp.) control in California rangelands over five years
Russian thistle (<i>Salsola</i> spp.) control in California rangelands over five years Open
Russian thistle, also known as tumbleweed ( Salsola spp.), is a problematic invasive plant found on natural and working landscapes. On a California rangeland, we tested the singular and interactive treatments of grazing, herbicide, and see…
View article: Effects of eye patches on corneal ulcer healing and weight gain in stocker steers on pasture: a randomized controlled trial
Effects of eye patches on corneal ulcer healing and weight gain in stocker steers on pasture: a randomized controlled trial Open
Infectious bovine keratoconjunctivitis (IBK) is a painful ocular disease in cattle that is characterized by the presence of a corneal ulcer and production losses. A common industry practice is to cover an affected eye with a piece of cloth…
View article: Integration of grazing and herbicide application improves management of barb goatgrass and medusahead in pasture and rangelands
Integration of grazing and herbicide application improves management of barb goatgrass and medusahead in pasture and rangelands Open
The invasive annual grasses barb goatgrass ( Aegilops triuncialis L.) and medusahead ( Elymus caput-medusae L.) are widespread in western states and present management challenges on grasslands. To develop an integrated management strategy …
View article: Vegetation Management
Vegetation Management Open
Author(s): George, Melvin; Frost, William; McDougald, Neil | Abstract: The response of vegetation, livestock, and ecosystems to grazing is complex, and grazing managers are confronted with a variety of grazing strategies or systems that ar…
View article: Livestock Production
Livestock Production Open
Author(s): George, Melvin; Harper, John; Davy, Josh; Becchetti, Theresa; Maier, Gabriele | Abstract: Livestock production on California’s annual rangelands has adapted to the seasonality of rangeland forage dominated by annual grasses and …
View article: Determining Volume in a Small Pond with a Staff Gauge and Depth-Capacity Curve
Determining Volume in a Small Pond with a Staff Gauge and Depth-Capacity Curve Open
Since stock ponds are not flat bottomed, the simplest way to monitor water volume is with a depth-capacity curve showing the total volume stored at various water levels throughout the season. You can use this publication to develop a pond …
View article: Traditional market-animal projects positively influence 4-H enrollment
Traditional market-animal projects positively influence 4-H enrollment Open
The 4-H Youth Development Program (4-H) teaches life skills. An understanding of the factors that drive participation in the California 4-H program can help the organization target its efforts to increase enrollment and benefit more Califo…
View article: Monensin and mineral supplementation economically increase yearling cattle weight gain on California annual rangeland
Monensin and mineral supplementation economically increase yearling cattle weight gain on California annual rangeland Open
Stocker operators generally graze cattle on California annual rangelands from November to May. The profit margins of these operators is low as cattle sell for less per unit at the end of the season when compared with the beginning. This cr…
View article: Mineral status of California beef cattle1
Mineral status of California beef cattle1 Open
Optimal mineral nutrition is required for cattle reproduction, immune function, and structural development. Formal evaluation of the current mineral status of California beef cattle is currently lacking. In 2017, a survey was initiated tha…
View article: Timing Aminopyralid to Prevent Seed Production Controls Medusahead (<i>Taeniatherum caput-medusae</i>) and Increases Forage Grasses
Timing Aminopyralid to Prevent Seed Production Controls Medusahead (<i>Taeniatherum caput-medusae</i>) and Increases Forage Grasses Open
Exotic annual grasses such as medusahead [ Taeniatherum caput-medusae (L.) Nevski] and downy brome ( Bromus tectorum L.) dominate millions of hectares of grasslands in the western United States. Applying picloram, aminopyralid, and other g…
View article: Forage seeding in rangelands increases production and prevents weed invasion
Forage seeding in rangelands increases production and prevents weed invasion Open
Increasing forage productivity in the Sierra foothill rangelands would help sustain the livestock industry as land availability shrinks and lease rates rise, but hardly any studies have been done on forage selections. From 2009 to 2014, in…
View article: Efficacy of selenium supplementation methods in California yearling beef cattle and resulting effect on weight gain
Efficacy of selenium supplementation methods in California yearling beef cattle and resulting effect on weight gain Open
Selenium (Se) deficiency occurs commonly in California grazing cattle and has been associated with reduced immune function and, in some studies, reduced weight gain. Multiple methods of supplementing Se are available, but little research h…
View article: Barb Goatgrass and Medusahead: Timing of Grazing and Mowing Treatments
Barb Goatgrass and Medusahead: Timing of Grazing and Mowing Treatments Open
Timing of Grazing and Mowing TreatmentsB arb goatgrass (Aegilops triuncialis L.) and medusahead (Taeniatherum caput-medusae (L.) Nevski) are invasive annual grasses that have spread or have the potential to spread throughout much of Califo…
View article: Drought Tip: Supplemental Feeds for Cattle Operations during Drought
Drought Tip: Supplemental Feeds for Cattle Operations during Drought Open
O ne of the advantages of cattle production in California is the diversity of feeds available in times of need to supplement rangeland that is normally used for cattle.In most cases, supplementing with alfalfa or a combination of alfalfa a…
View article: Drought Tip: Drought Strategies for Feeding Cattle Grazing Annual Grassland
Drought Tip: Drought Strategies for Feeding Cattle Grazing Annual Grassland Open
D rought leads to predictable lack of forage production on rangelands.This leaves two possible management scenarios: sell animals to reduce forage demand, or supplement feeding to maintain herd genetics.In some cases producers may choose a…
View article: Investigation of<i>Anaplasma marginale</i>Seroprevalence in a Traditionally Managed Large California Beef Herd
Investigation of<i>Anaplasma marginale</i>Seroprevalence in a Traditionally Managed Large California Beef Herd Open
Recent observations by stakeholders suggested that ecosystem changes may be driving an increased incidence of bovine erythrocytic anaplasmosis, resulting in a reemerging cattle disease in California. The objective of this prospective cohor…