abstract the lack of water is the most important problem in extensive landscape especially turfgrass in arid and semi arid regions. the root responses in native and commercial grasses under drought stress were investigated. this experiment was in a factorial experiment based on unbalanced completely random design on the year 2006. the specious that we used in this experiment included (i) commer...

unshaded sites in southern USA when exposed to high summer temperatures (Van Santen and Sleper, 1996). The design of agroforestry systems requires a thorough understandNeither orchardgrass nor tall fescue had significant ing of biological interactions that might complement or constrain yield reduction in pots exposed to 50% shade, and orproduction. The objective of this study was to examine eff...

............................................................................................................................ iii ACKNOWLEDGMENTS ........................................................................................................ v CHAPTER 1. GENERAL INTRODUCTION ...................................................................... 1 Thesis Organization .......................

Tall fescue is native to Europe and was rarely planted in the United States until after the first four decades of the 20 century. However, since the release of the variety ‘Kentucky 31’ in 1943, this versatile cool season perennial grass has been widely planted for forage, turf, and conservation purposes, with most of the acreage planted consisting of this variety. “Fescue” has many attributes ...

Abstract Fescue toxicosis decreases beef cattle performance in a multitude of ways, including decreased health and immunity. Cattle challenged by fescue are often grazing an environment favorable for development gastrointestinal nematodes (GIN). Interactions parasite challenge may result further economic losses. Many producers treat animals regularly GIN parasites with little insight on necessi...

The predominant cool-season forage in the southeastern United States is the tall fescue cultivar Kentucky 31 (KY31). Kentucky 31 possesses an endophyte (), which produces a family of toxins called ergot alkaloids. These toxins negatively affect the physiology of animals on consumption and result in the syndrome known as fescue toxicosis. Currently, the United States annually produces approximat...

Two studies separated effects of dietary ergot alkaloids from effects of feed intake or ambient temperature on respiration rate (RR), heart rate (HR), surface temperature (ST), rectal temperature (RT), blood pressure (BP), serum hormone, and plasma metabolite concentrations in beef steers. The balanced, single reversal design for each experiment used 8 beef steers fed tall fescue seed [2.5 g/kg...

Abstract The article presents the results of many years research on new valuable reed fescue bluegrass crop attracting to fodder production region. Rational combinations main crop-forming factors were established: timing, sowing methods and their effect productivity when used for seed purposes, ensuring receipt 400 800 kg/ha seeds from 20 30 t/ha green mass. Reed fescue, optimizing conditions s...