نتایج جستجو برای: soil compaction

تعداد نتایج: 188551  

2000
B. J. Radford B. J. Bridge R. J. Davis D. McGarry U. P. Pillai J. F. Rickman P. A. Walsh D. F. Yule

Soil compaction has been recognised as the greatest problem in terms of damage to Australia's soil resource. Compaction by tractor and harvester tyres, related to traf®cking of wet soil, is one source of the problem. In this paper an array of soil properties was measured before and immediately after the application of a known compaction force to a wet Vertisol. A local grain harvester was used ...

Journal: :journal of agricultural science and technology 2010
m. loghavi m. r. khadem

development of sensors to detect the location and depth of hard pans in real time is a major restriction on the application of site specific crop management (sscm). in this study, a soil compaction profile sensor equipped with four horizontal operating penetro-meters for on-the-go sensing and mapping of the location and intensity of hard pans arti-ficially formed in a soil bin was developed and...

2010
P. Défossez G. Richard Y-J. Cui A-M. Tang V. Chaplain

Identifying the vulnerability of soils to compaction damage becomes an increasingly important issue in the planning and execution of farming operations. Soil compaction models are efficient tools for predicting soil compaction due to agricultural field traffic. Most of these models require the knowledge of the stress/strain relationship, as well as the mechanical parameters and their variation ...

Journal: :journal of computational applied mechanics 0
kazem jafari naeimi assistant professor, department of mechanical engineering of biosystems, faculty of agriculture, shahid bahonar university of kerman, kerman, iran hossein baradaran associate professor, department of mechanical engineering, faculty of engineering, shahid bahonar university of kerman, kerman, iran razie ahmadi m.s. student, department of mechanical engineering of biosystems, faculty of agriculture, shahid bahonar university of kerman, kerman, iran malihe shekari m.s. student, department of mechanical engineering of biosystems, faculty of agriculture, shahid bahonar university of kerman, kerman, iran

soil is a nonrenewable source that needs considerable management to prevent physical deteriorationby erosion and compaction. compacted soil causes low fertility and yield. the purpose of this study isto investigate the effect of viscoelastic properties of soil and to determine important factors oncompaction. furthermore, stress distribution, prediction of soil compaction and simulation of its e...

Journal: :جنگل و فرآورده های چوب 0
مقداد جورغلامی دانشکده منابع طبیعی دانشگاه تهران، دکترای جنگلداری آزاده خرمی زاده دانشگاه تهران شکوه سلطانپور گروه جنگلداری و اقتصاد جنگل، دانشکده منابع طبیعی، دانشگاه تهران

the use of heavy machinery in forestry operations such as logging has increased worldwide during the last decades. however, these machines may seriously influence the soil ecosystem as they induce rutting, disturbing the upper soil layers, and soil compaction. severe compaction of soil adversely affects the growth of plants.this study was done by using a penetration resistance experiment in a g...

2005
T. E. Grift M. Z. Tekeste R. L. Raper

The ASAE standardized tool to detect the depth and strength of compaction layers in the field is the cone penetrometer. Since this method is point-to-point, researchers have experimented with on-the-fly alternatives that can be used as, or in combination with, a standard tillage tool. On-the-fly compaction layer sensing also enables adaptive tillage, where the soil is only tilled as deep as nec...

حسن‌پور, رضا, زارع‌حقی, داود, نیشابوری, محمدرضا,

Soil salinity and compaction are probably the most prevailed limitations for crop growth and production. Their mitigation and control may be important crop management keys that can ensure yield sustainability and optimum use of land and water. This research was performed to investigate the combined effect of soil salinity and soil compaction on some growth characteristics of corn (Zea mays L.) ...

Soil is a nonrenewable source that needs considerable management to prevent physical deteriorationby erosion and compaction. Compacted soil causes low fertility and yield. The purpose of this study isto investigate the effect of viscoelastic properties of soil and to determine important factors oncompaction. Furthermore, stress distribution, prediction of soil compaction and simulation of its e...

2000
A. R. Barzegar M. A. Asoodar M. Ansari

Incorporation of crop residues into the soil can reduce its susceptibility to compaction. However, the signi®cance of incorporated crop residue at different soil water contents at the time of compaction and the compaction loads is not well documented. The compactibility of three soils which contained different amounts of sugarcane residue was investigated at different water contents and compact...

2013
Christine Jakobsson Laura Alakukku

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