کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10295289 | 513120 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adverse effects of simulated harvesting of short-rotation willow and poplar coppice on vertical pressures and rut depths
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
Little is known of the effects of mechanized harvesting on ground conditions during the harvesting of short-rotation coppice. An investigation was therefore carried out in which different vehicles were used to simulate the effects of wheeling from heavy and light harvesters and crop removal equipment. The experiments were carried out on sites containing Bowles hybrid willow (Salix viminalis) and poplars (Populas rap) and on clay and sandy loam soils. The effect of different vehicles was assessed in terms of rut damage and direct measurements of soil stress using buried sensors. Maximum stresses measured 0.3Â m below tractor wheels ranged from 50 to 200Â kPa, but the greatest stresses, 350Â kPa, were recorded under laden trailer wheels. Maximum stresses measured beneath crawler tracks were only 25Â kPa. Similarly, substantial ruts were caused by vehicles simulating wheeled harvesters, the deepest ruts were caused by laden trailers but crawler tracks created least disturbance. Wheeling was carried out at soil water contents above the plastic limit and the deepest ruts were created on clay rather than sandy loam soil. The effects of the stresses generated in the soil could impede future root growth, and the deeper ruts formed could damage existing root systems of coppice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil and Tillage Research - Volume 84, Issue 2, December 2005, Pages 192-199
Journal: Soil and Tillage Research - Volume 84, Issue 2, December 2005, Pages 192-199
نویسندگان
C.W. Watts, L.J. Clark, W.C.T. Chamen, A.P. Whitmore,