搜索结果: 1-15 共查到“农学 Soil compaction”相关记录19条 . 查询时间(0.092 秒)
Considering the soil compaction status on logging areas in a Hyrcanian forest
cutting area slope timber harvesting tree volume
2015/5/18
This paper deals with the issue of soil compaction during timber harvesting operations on cutting areas.
Soil compaction was assessed following the logging operation in Darabkola forest area by meas...
Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)
soil compaction forest soil wheeled skidder
2015/3/6
In forest harvesting operations usually after using skidding machinery (skidders), traces of soil damage in the form of soil compaction and wheel and logs ruts can be seen in the forest soil. Soil bul...
Soil compaction as the possible cause of wilting and premature ripening of sunflower – Short Communication
sunflower roots premature ripening soil compression soil aeration
2015/2/6
Brown patches of the size from several square metres to hectares or individual dying plants appeared in otherwise green stands. Affected plants wilt and ripen sooner than healthy ones, causing them to...
The effect of the soil compaction on the contents of alfalfa root reserve nutrients in relation to the stand density and the amount of root biomass
alfalfa soil density root reserve nutriet
2015/1/30
The reserve root nutrients influence the overwintering, regrowth, yield, and persistence of alfalfa plants. The total amount of the root reserves is considered more important than their concentration....
Long-term rice-based cropping system effects on near-surface soil compaction
Bulk Density Crop Rotation Soil Organic Matter Tillage
2013/3/4
Irrigated rice (Oryza sativa L.) production is as-sociated with frequent cycling between anaero-bic and aerobic conditions, which can lead to a greater rate of soil organic matter (SOM) de-composition...
Effects of Soil Compaction by Tractor Traffic on reclaimed soil in Isahaya Bay
reclaimed field of Isahaya Bay soil compaction
2010/12/3
At a reclaimed field of Isahaya Bay, a vehicle running test was conducted using tractors, and the penetration resistance (cone index) of soil before and after the running was compared. From this resul...
Interspecific Differences of the Root System Structures of Four Cereal Species as Affected by Soil Compaction
Cereal root system structures Interspecific differences Lateral root development Mechanical impedance Root system morphometry Root extension rate Soil compaction Soil physical environment
2009/8/5
Comparison of the root system structures of four cereal species as affected by soil compaction was conducted morphometrically. Plants were grown under two different soil bulk densities of 1.33g/cm3 (c...
Water Competition of Intercropped Pearl Millet with Cowpea under Drought and Soil Compaction Stresses
Deuterium Heavy water Leaf water potential Mechanical stress Stable isotope Water source Water uptake
2009/7/24
Intercropping pearl millet with cowpea is a common practice in semiarid areas. Under limited water environments, competition for soil water between intercropped plants may be strong. Furthermore, the...
Dynamics of Root Border Cells in Rhizosphere Soil of Zea mays L.:Crushed Cells during Root Penetration, Survival in Soil,and Long Term Soil Compaction Effect
Detached cells Maize Rhizosphere Root cap Sloughed root cap cells Soil compaction Soil mechanical impedance
2009/7/23
Plant roots release mucilage and root border cells (RBCs) into rhizosphere, which function as a complex at the root-soil interface. The dynamics of RBCs in rhizosphere soil, however, remains unknown. ...
Aspen regeneration, forage production, and soil compaction on harvested and grazed boreal aspen stands
forest grazing Peace River region forest soil
2009/2/11
The objective of our study was to determine the effects of timber harvesting and cattle grazing on aspen regeneration, forage production, and soil compaction on aspen cutblocks in the Peace River regi...
Soil compaction in timber skidding in winter conditions
soil compaction multipass skid trail timber skidding water-air soil characteristics
2009/2/7
The research of soil compaction in timber skidding was carried out on two skid trails of uniform slope –15%and 30 %. The degree of soil compaction is shown by changes of water-air soil characteristi...
Soil Compaction on Forest Soils from Different Kinds of Tires and tracks and Possibility of Accurate Estimate
soil compaction tracks depth of ruts porosity
2009/2/7
An 8-WD forwarder loaded with 9,520 kg of timber, and fitted with low or high tire pressures, or tires rounded with tracks, was repeatedly driven on soil for 1, 8 and 24 passes to investigate mechan...
Comparative analysis of some soil compaction measurement techniques
soil mechanics soil compaction cone index sinkage needle penetratrion
2008/11/21
There is a need to properly define soil compaction as one of the complex soil characteristics relevant to agriculture since it greatly influences plant growth and energy consumption.The level of soil ...
Effect of soil compaction and organic matter on the early growth of maize (Zea mays) in a vertisol
vertisol organic matter compaction maize early growth
2008/11/20
A laboratory experiment was conducted to determine the emergence and early growth of maize (Zea mays) seeds in a dark clay soil known as vertisol (Typic Pellustert). Three quantities of groundnut hau...
Effect of soil compaction on root growth and crop yieldin Central and Eastern Europe
soil compaction root growth and functions root-shoot relations
2008/11/20
Variations in root growth and functions in response to soil compaction associated with soil and crop type, and soil wetness at the time of load application and weather in Central and Eastern Europe a...