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| Registros recuperados: 157 | |
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| Mayland, H.F.; Schuman, G.E.; Booth, D.T.; Waggoner Jr, J.W.. |
| The Pathfinder Uranium Mine which is located in southeastern Wyoming, was actively mined during the 1960's-1980's. Reclamation involved returning the spoil/overburden and replacing the salvaged topsoil. The area was revegetated in 1974-1977, but was not grazed until 1980-85. A grazing experiment was then conducted to determine solubility of mineral elements in soil, uptake by plants and absorption by grazing animals. Blood sera were collected at 28-30 day intervals during the three grazing/growing seasons in 1980-1982. Blood sera samples were frozen and later analyzed by ICP. When compared to published data, plants on the reclaimed site contained lower concentrations of Ca, Mg, Mn, P, and Zn; but higher concentrations of Cd, Cr and Ni than plants... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Animal health; Chemistry; Chemistry; Mass Import - autoclassified (may be erroneous). |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/956/1/1183.pdf |
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| Mayland, H.F.. |
| The higher fatty acids (HFA) are important plant constituents that are implicated in the grass tetany hazard in livestock. A method is given whereby a technician can analyze 12 forage samples daily for HFA content. The method consists of saponifying the plant material in ethanol and KOH and extracting the subsequently acidified HFA with petroleum ether. The petroleum ether phase is evaporated and the HFA residue is dissolved in ethanol and then titrated with standardized isobutanolic KOH in the absence of Oxygen by using an Nitrogen atmosphere. A standard plant sample, analyzed over a 37-day period, had a mean of 136 mmol H+kg ± 4.5, where 0.1 mmol H+ℓ palmitic standard was determined with an accuracy of 99 ± 1.9%. |
| Tipo: Article |
Palavras-chave: Chemistry; Forage quality; Grass forage. |
| Ano: 1979 |
URL: http://eprints.nwisrl.ars.usda.gov/1442/1/436.PDF |
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| Burns, J.C.; Fisher, D.S.; Mayland, H.F.. |
| Forages accumulate nonstructural carbohydrates during the day, with animals showing preference and improved daily responses from afternoon compared with morning cut hays. This study evaluated alfalfa (Medicago sativa L.) hay harvested at 0700, 1000, 1300, 1600, and 1900 h to determine how nutritive value changes during the day and to assess the impact of these changes on animal preference using cattle (Bos taurus L.), sheep (Ovis aries L.), and goat (Capra hircus L.) responses. Total nonstructural carbohydrates were altered by time of cut (cubic contrast, P < 0.01) ranging from 85 g kg?1 at 0700 h to 83 g kg?1 at 1000 h, then increasing to 97 g kg?1 by 1600 h with little change at 1900 h (96 g kg?1). Fiber fractions also varied diurnally,... |
| Tipo: Article |
Palavras-chave: Animal; Time-of-day harvest difference; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/69/1/1234.pdf |
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| Registros recuperados: 157 | |
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