In certain production environments, beef cows are mated during a breeding season that starts in early summer. Cows found not to be pregnant at the end of the breeding season could either be culled or retained and remated the following summer. Alternatively, nonpregnant cows could be mated in the winter. This option would result in having both a spring and a fall calving herd. The purpose of our...

This study investigated the performance of steers grazing rhizomatous birdsfoot trefoil (Lotus corniculatus L.) (RBFT) compared to nonrhizomatous birdsfoot trefoil (BFT) in pure stands or when interseeded with endophyte-free tall fescue (Festuca arundinacea Schreb.; TF). Five forage treatments of RBFT, BFT, TF, RBFT+TF, and BFT+TF (four replicate paddocks per treatment) were continuously stocke...

1. We examined the effects of variation in the timing of spring leaf production and autumn leaf fall on the survival, mortality and abundance of Cameraria hamadryadella on Quercus alba and Q. macrocarpu. 2. We monitored and manipulated the timing of foliation on field and potted Q.alba trees and observed the abundance of C. hamadryadella on those trees. We also monitored and manipulated the tim...

Species of sap beetles present at a central Illinois cornfield-oak woodland habitat were determined by spring to fall collections from can traps baited with fermenting wheat dough and banana. Carpophilus lugubris Murray was the dominant species. Glischrochilus quadrisignatus (Say) and Stelidota geminata (Say) were also collected frequently. Other species collected commonly were C. antiquus Mels...

Enhancing Green Paving in Oklahoma Using Recycled Asphalt Shingles Prof. Musharraf Zaman School of Civil Engineering and Environmental Science Each year, an estimated 11 million tons of old asphalt shingles from roofs are disposed of in the United States. In Oklahoma, it costs between $50 and $150 per ton, depending on size and kind of debris, to dispose of these materials in landfills. Recent ...

this study has been conducted in the slaughter- house of the city of kerman, for one year, starting march 1993. a total number of 16402 livestocks including 5013 sheep, 8163 goats and 3226 cattle were examined in a regular manner, 120 days, with a mean of 30 days per season. after recording the king, sex and origin of each animal, liver and lungs were examined carefully for hydatid cyst. in gen...

Wintering cattle directly in the field creates potential concerns with water quality, as nutrients added from urine and fecal material over the winter can end up in runoff water, ground water and soil. In 2008/2009 an experiment was conducted to observe the effect of in-field winter feeding of cows on the nutrients in spring snowmelt run-off water. Low temperatures give little opportunity for o...

It is common for stocker operators to buy calves in the spring and sell them as feeder cattle in the fall. Economic favorability of various stocker systems based on animal response is largely untested. A systems grazing study was conducted to compare net returns of 2 different forage management practices with a control. A spring group and a fall group of steers were stocked in each of 3 treatme...