نتایج جستجو برای: durmast oak

تعداد نتایج: 9469  

2002
Emile S. Gardiner

Seedlings of cherrybark oak (Quercus pagoda Rafinesque), Nuttall oak (Quercus nuttallii Palmer) and overcup oak (Quercus lyrata Walter) were grown under two light levels, partial (20 percent) or full sunlight, to study physiological acclimation of leaves to low light availability. Shifts in leaf morphology were noted for seedlings raised beneath partial sunlight, and photosynthetic light respon...

Journal: :Applied and environmental microbiology 2007
Algis Aucina Maria Rudawska Tomasz Leski Audrius Skridaila Edvardas Riepsas Michal Iwanski

We report the effects of pine and oak litter on species composition and diversity of mycorrhizal fungi colonizing 2-year-old Pinus sylvestris L. seedlings grown in a bare-root nursery in Lithuania. A layer of pine or oak litter was placed on the surface of the nursery bed soil to mimic natural litter cover. Oak litter amendment appeared to be most favorable for seedling survival, with a 73% sur...

2012
Paul P. Kormanik Shi-Jean S. Sung Stanley J. Zarnoch Thomas Tibbs

Northern red oak (Quercus rubra) and white oak (Quercus alba) are important components of high-quality mes1c s1tes and are essential as lumber species and hard mast producers. Regeneration of these species has been difficult, and their absence in newly regenerated stands is a major concern of foresters and wildlife biologists Several 1mportant biolog1cal tra1ts of oak species may contribute to ...

2004
Michael A. Steele Peter Smallwood William B. Terzaghi John E. Carlson Thomas Contreras Amy McEuen

INTRODUCTION Although oaks dominate many forest ecosystems worldwide (Barnes and others 1998), several aspects of oak ecology remain poorly understood including oak regeneration and masting (McShea and Healy 2001). Animals that eat and disperse acorns, such as squirrels, mice, and jays may play a pivotal role in oak forest dynamics (Jones and others 1998, Ostfeld and others 1996), influencing r...

2005
E. Padilla-Rodal A. Galindo-Uribarri C. Baktash J. C. Batchelder J. R. Beene R. Bijker B. A. Brown O. Castaños B. Fuentes J. Gomez del Campo P. A. Hausladen Y. Larochelle A. F. Lisetskiy P. E. Mueller D. C. Radford D. W. Stracener J. P. Urrego R. L. Varner C.-H. Yu

E. Padilla-Rodal, A. Galindo-Uribarri, C. Baktash, J. C. Batchelder, J. R. Beene, R. Bijker, B. A. Brown, O. Castaños, B. Fuentes, J. Gomez del Campo, P. A. Hausladen, Y. Larochelle, A. F. Lisetskiy, P. E. Mueller, D. C. Radford, D. W. Stracener, J. P. Urrego, R. L. Varner, and C.-H. Yu Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA Instituto de Ciencias Nuclea...

2012
C. Colin Hollister James J. Bisogni Johannes Lehmann

137 Biochar (BC) was evaluated for nitrogen (N) and phosphorus (P) removal from aqueous solution to quantify its nutrient pollution mitigation potential in agroecosystems. Sorption isotherms were prepared for solutions of ammonium (NH4 +), nitrate (NO3 -), and phosphate (PO4–P) using BC of corn (Zea mays L.) and oak (Quercus spp.) feedstock, each pyrolyzed at 350 and 550°C highest treatment tem...

2015
K. Rajkumar R. Bhar A. Kannan R.V. Jadhav Birbal Singh and G. Mal

AIM A study was conducted to evaluate the effect of replacing oat fodder (OF) with fresh oak leaves (FOL) or chopped oak leaves (COL) on rumen fermentation and digestibility through in vitro gas production technique (IVGPT). MATERIALS AND METHODS Nine different diets were prepared by mixing OF with oak leaves (either FOL or COL) in different ratios (100:0, 75:25, 50:50, 25:75, and 0:100). The...

2011
Emile S. Gardiner Daniel C. Dey John A. Stanturf Brian Roy Lockhart

The lowlands associated with the Mississippi River and its tributaries historically supported extensive broadleaf forests that were particularly rich in oak (Quercus spp.) species. Beginning in the 1700s, deforestation for agriculture substantially reduced the extent of the original forest, and fragmented the remainder into small parcels. More recently, declines in agricultural commodity prices...

2006
Jeff Stringer

Oak Regeneration Dynamics Successful regeneration of oak on intermediate and high-quality sites (upland oak site index > 65 to 70 feet) is limited due to the lack of the vigorous advance regeneration and/or saplings/pole-sized trees that are capable of sprouting. Vigorous advance regeneration and/or stump sprouters are required at the time of regeneration on intermediate and highquality sites, ...

2002
Rick A. Sweitzer Dirk H. Van Vuren

Wild pigs (Sus scrofa) have been widely distributed by humans and significant populations now occur in oak-dominated ecosystems in California. Because they are omnivorous and forage by rooting, wild pigs have the potential to impact a wide variety of plants and animals directly by consumption and indirectly through disturbance. In 1998, we initiated a long-term study of the ecological effects o...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید