Range Burning and Fertilizing Related to Nutritive Value of Bluestem Grass

The influence of range burning and nitrogen fertilization on the nutritive value of big and little bluestem in Kansas True Prairie were studied. Late spring burning decreased dry matter, crude fiber, cell wall constituents, cellulose, and lignin, and increased crude protein, ether extract, nitrogen free extract, and ash. Nitrogen fertilization decreased nitrogen free extract and increased crude fiber, lignin, and ash. Big bluestem was higher than little bluestem in nitrogen free extract, and lower in crude fiber, cell wall constituents, lignin, and cellulose.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Effects of Nitrogen Fertilization and Late-Spring Burning of Bluestem Range on Diet and Performance of Steers

Cattle were used to evaluate the effects of late-spring burning and nitrogen fertilization alone and in combination on a typical True Prairie range in the Flint Hills near Manhattan, Kans. Diet quality was improved by higher protein and hemicellulose, and by lower acid-detergent fiber (lignocellulose) of burned than nonburned pastures. Hemicullulose and neutral detergent fiber (cell-wall constituents) increased when 40 lb N/acre was applied. Cellulose and lignin were not affected by either treatment. Average daily gain and gain per acre were higher by steers on burned pastures than by those on nonburned pastures. Daily gain waa highest for steers on pastures burned and fertilized. Gain per acre on fertilized pastures exceeded gains from nonfertilized pastures primarily from heavier stocking rate rather than increased individual performance. Apparent dry-matter digestibility did not differ among treatments, but decreased June through August, then increased in October.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202

Using Remote Sensing to Aid the Assessment of Human Health Risks from Blooms of Potentially Toxic Cyanobacteria

Mass populations of toxic cyanobacteria in recreational waters can present a serious risk to human health. Intelligence on the abundance and distribution of cyanobacteria is therefore needed to aid risk assessment and management activities. In this paper, we use data from the Compact Airborne Spectrographic Imager-2 (CASI-2) to monitor seasonal change in the concentration of chlorophyll a (Chl a) and the cyanobacterial biomarker pigment C-phycocyanin (C-PC) in a series of shallow lakes in the UK. The World Health Organization guidance levels for cyanobacteria in recreational waters were subsequently used to build a decision tree classification model for cyanobacterial risk assessment which was driven using Chl a and C-PC products derived from the CASI-2 data. The results demonstrate that remote sensing can be used to acquire intelligence on the distribution and abundance of cyanobacteria in inland waterbodies. It is argued the use of remote sensing reconnaissance, in conjunction with in situ based monitoring approaches, would greatly aid the assessment of cyanobacterial risks in inland waters and improve our ability to protect human health. ABSTRACT FROM AUTHORCopyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.

The Production and Deposition of the Guisborough Helmet

In September 1878 the British Museum received a donation of a folded metal plate which had been embossed and gilded. Restoration of the object revealed that the folded plate was in fact the outer casing of a Roman copper alloy cavalry sports type helmet which dates to the late second or third century AD. The story of what became known as the Guisborough helmet began 14 years earlier in what was then the North Riding of Yorkshire when workers employed by the Cleveland Railway Company discovered a ‘very curious plate of metal’ during road construction. It appears that the helmet was deliberately prepared for deposition and buried at a depth of c30 cm close to a stream. Examination by the authors suggests that this was a high value item that had been repaired many times. Experimental evidence suggests that the decoration alone required approximately 16 h to fashion