Fuel and lubricant consumption in felling the young oak-hornbeam stands
نویسندگان
چکیده
منابع مشابه
Growth dynamics of crown shapes in stands of pedunculate oak and common hornbeam
Background and Purpose: Structure of crowns in forest stands is one of the main factors which determines growth and development of trees. Dynamic change occurs with the age of the stand due to silvicultural interventions or natural disturbances during which trees are removed from the stand. The aim of this article is to analyse the structure of the crown shape of pedunculate oak and common horn...
متن کاملFuel , Hydraulic Oil and Lubricant Consumption in Swedish Mechanized Harvesting Operations , 1996
When subjecting forest products to certification the total environmental load of wood harvesting machinery should also be assessed. In this study fuel, hydraulic oil and lubricant consumption in harvesting operations in Sweden has been examined by using machine data acquired through a questionnaire. The objectives of the study were to assess the contractor and forest company owned harvesters’ a...
متن کاملeconomic optimization and energy consumption in tray dryers
دراین پروژه به بررسی مدل سازی خشک کردن مواد غذایی با استفاده از هوای خشک در خشک کن آزمایشگاهی نوع سینی دار پرداخته شده است. برای آنالیز انتقال رطوبت در طی خشک شدن به طریق جابجایی، یک مدل لایه نازک برای انتقال رطوبت، مبتنی بر معادله نفوذ فیک در نظر گفته شده است که شامل انتقال همزمان جرم و انرژی بین فاز جامد و گاز می باشد. پروفایل دما و رطوبت برای سه نوع ماده غذایی شامل سیب زمینی، سیب و موز در طی...
15 صفحه اولDrought Effects on Physiology and Biochemistry of Pedunculate Oak and Hornbeam
Background and Purpose: Water stress is one of the major problems for urban trees. It affects a wide range of plant responses, from changes at the cellular level to the reduction in growth rates. Irrigation of trees in urban areas may provide numerous benefits important for increasing tree vitality to withstand other stresses that might occur. The aim of this study was to compare drought effect...
متن کاملSoil Water, Temperature Regime and Growth of Young Oak Stands Grown in Lysimeters Subjected to Drought Stress and Air Warming
In a 3-year lysimeter experiment we investigated how young trees of Quercus robur, Q. petraea and Q. pubescens, growing either on acidic loamy sand or calcareous sandy loam, responded to an elevation in air temperature by 1-2°C and drought periods lasting several weeks. As intended, the water potentials were clearly lower in drought-treated soil than in the control treatment. Decreased evapotra...
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ژورنال
عنوان ژورنال: Glasnik Sumarskog fakulteta
سال: 2002
ISSN: 0353-4537,2217-8600
DOI: 10.2298/gsf0286059b