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...

0360-1315/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.compedu.2010.02.005 * Tel.: +27 46 603 8640; fax: +27 46 636 1915. E-mail address: [email protected] In 2001 Marc Prensky coined the phrase ‘digital natives’ to refer to the new generation of students who have grown up surrounded by technology. His companion papers spurred large amounts of research, debating changes that are requ...

This paper offers new evidence on the sources of cross-country income differences. It exploits the idea that observing immigrant workers from different countries in the same labor market provides an opportunity to estimate their relative human capital endowments without having to adjust for other sources of country-specific productivity differences. Based on such estimates, a neoclassical growt...

his classroom description is an enactment of the research-based practices demonstrated to be most effective for all populations we have studied (Tharp et al. 2000), kindergarten through middle school. Four decades of research in the field of education and diversity have produced a clear and solid body of evidence strong enough to guide teachers, regardless of the languages, ethnicities, race, o...

in the turfgrass industry, the need for salinity tolerant turfgrasses is increasing because of the increased use of saline and non-potable water. greenhouse container experiments were conducted to determine the relative salinity tolerance and growth responses of eleven native populations of tall fescue (festuca arundinacea schrub) (tf), including: semirom, mashhad, sanandaj, yasuj, yazd abad, d...