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Full-Text Articles in Agriculture
Foraging Behavior Of Heritage Versus Recently Introduced Herbivores On Desert Landscapes Of The American Southwest, Ed Frederickson, H. Peinetti, Debra Peters, Andres Cibils, J. Roacho-Estrada, Andrea Laliberte
Foraging Behavior Of Heritage Versus Recently Introduced Herbivores On Desert Landscapes Of The American Southwest, Ed Frederickson, H. Peinetti, Debra Peters, Andres Cibils, J. Roacho-Estrada, Andrea Laliberte
Ed L. Frederickson
Since the 1800s managed grasslands and shrublands of the arid American Southwest have been grazed predominantly by cattle originally bred for temperate climates in northern Europe. A heritage breed, the criollo cattle, has survived in northern Mexico for more than 400 years under desert-like conditions of low and variable rainfall, hot temperatures in the growing season, and both spatially and temporally scarce levels of primary production. We tested the hypothesis that the heritage breed has a broader spatial foraging distribution under harsh environmental conditions, and that its distribution is driven by environmental variables which differ from those that control the …
Effects Of Cis-Ss-Ocimene, Cis-Sabinene Hydrate, And Monoterpene And Sesquiterpene Mixtures On Alfalfa Pellet Intake By Lambs, Ed Frederickson, R. Estell, Dean Anderson
Effects Of Cis-Ss-Ocimene, Cis-Sabinene Hydrate, And Monoterpene And Sesquiterpene Mixtures On Alfalfa Pellet Intake By Lambs, Ed Frederickson, R. Estell, Dean Anderson
Ed L. Frederickson
Interpretive Summary: The conversion of grasslands to shrublands in the western United States and in arid regions throughout the world is a serious concern to livestock producers and ecologists. This process of desertification not only reduces available forage for livestock and wildlife, but also leads to increased soil erosion and reduced biodiversity. These shrubs often contain chemicals that make them unpalatable to browsing animals. We have been conducting a long-term study on the impact of volatile plant chemicals such as terpenes on shrub consumption by livestock. Our previous work showed that for a common shrub in the northern Chihuahuan Desert …
Effects Of Eugenol, Α-Terpineol, Terpin-4-Ol, And Methyl Eugenol On Consumption Of Alfalfa Pellets By Sheep, Ed Frederickson
Effects Of Eugenol, Α-Terpineol, Terpin-4-Ol, And Methyl Eugenol On Consumption Of Alfalfa Pellets By Sheep, Ed Frederickson
Ed L. Frederickson
Many secondary compounds are typically present in unpalatable shrubs on arid and semi-arid rangelands. However, the relationship between intake by livestock and concentration of individual chemicals has been examined for very few of these compounds. Four experiments were conducted to examine effects of individual volatile compounds on intake of alfalfa pellets by lambs. Forty-five lambs (9 lambs/treatment) were individually fed alfalfa pellets with eugenol, α-terpineol, terpin-4-ol, or methyl eugenol applied at one of five concentrations. Treatments were multiples (0, 0.5, 1, 2, and 10×) of the concentration (×) of each compound on the leaf surface of Flourensia cernua. Treatment solutions …