搜索结果: 1-15 共查到“农业基础学科 strength”相关记录19条 . 查询时间(0.135 秒)
Effect of microstructure factors on abrasion resistance of high-strength steels
abrasive wear working tools in agriculture ASTM G65 mechanism of wear
2014/9/22
Current development of high strength abrasion resistant steels is mostly oriented on high hardness, martensitic concept following the hypothesis that the abrasion resistance holds a proportional tende...
Effects of dietary fat, vitamin E and zinc supplementation on tibia breaking strength
Broiler heat stress fat zinc vitamin E femur breaking strength
2011/1/13
The objective of this experiment was to characterize the relationship between dietary fat and antioxidant supplementation, on tibia breaking strength (TS) and performance parameters in broiler chicken...
Changes in soil organic matter, bulk density and tensile strength of aggregatesafter percolation in soils after conservation and conventional tillage
percolation process carbon distribution aggregates strength
2008/11/26
The type of tillage in arable soils affects porosity of the soil and in consequence the hydraulic conductivity. The accessibility and mobility of organic carbon in arable soils can differ depending on...
Effects of temperature and moisture content on the strength properties of African nutmeg (Monodora myristica)
deformation failure stress strain energy
2008/11/26
The effect of temperature and moisture content of African nutmeg seed coat was studied as it affects compressive force, deformation, failure stress, strain energy and modulus of elasticity (firmness)....
Analysis of the strength properties of pea stems
pea stem cutting work geometric parameters anatomical structure
2008/11/26
In the study the authors determined the mechanical properties of pea stems, in the dynamic test, as well as the wall thickness of hollow stem (G) and cross-section area (S). The study was conducted o...
Changes in strength characteristics of heat-treated wheat grain (communication)
wheat grain microwave heat treatment strength characteristics
2008/11/24
A preliminary study was conducted to determine the effect of a high temperature on some strength characteristics of wheat grain. The grain’s moisture content (15, 20, and 30%) was tested in a mic...
Strength properties of rice kernels related to losses of grain during combine harvesting and pos-tharvest treatment were determined for seven varieties of rice cultivated in Italy. Compression tests u...
Comparison of soil amendments to decrease high strength in SE USA Coastal Plain soils using fuzzy decision-making analyses
soil amendment hardpan PAM organic matter
2008/11/21
Cemented subsurface layers restrict root growth in many southeastern USA Coastal Plain soils. Though cementa- tion is usually reduced by tillage, soil amendments can offer a more permanent solution if...
Effect of loading rate and pre-heating time on the strength propertiesof African nutmeg (Monodora myristica)
African nutmeg loading rate pre-heating time strength properties
2008/11/21
In this work, the effect of loading rate and pre-heating time on African nutmeg seed coat was investigated as it affects compressive force, deformation, failure stress, strain energy and modulus of el...
Fatigue strength of wheat grains. Part 1. The analysis of grain deformation at multiple loads
multiple loads grain deformation
2008/11/21
In the majority of studies concerning the evaluation of grain resistance, the authors usually make use of the method of visual evaluation of grain condition - with respect both to external and interna...
Fatigue strength of wheat grains. Part 2. The fatigue strength index for wheat grain
multiple loads grain deformation
2008/11/21
In the presented research, fatigue tests were conducted in which a load was applied in the from of a mechanic impact. In the authors opinion, it is the best method to simulate natural conditions, whe...
Estimating trafficability of three Nigerian agricultural soils from shear strength-density-moisture relationsEstimating trafficability of three Nigerian agricultural soils from shear strength-density-moisture relations
compactive efforts trafficability moisture content shear strength dry density
2008/11/19
The dry density and shear strength of Iwo (Alfisols), Egbeda (Entisols) and Ondo (Ultisols) soil series in south-western Nigeria were measured at different compaction efforts and moisture contents. Re...
Rapeseed storage and their mechanical strength
rapeseed storage damage maturity varieties mechanical strength
2008/11/12
Three varieties of rape were investigated Bolko, Polo, Leo. Each variety was investigated in two maturates: technical and full ones. Each sample with proper maturity and humidity (6 and 11 %) was stor...
Study of the strength properties of pistachio nuts and cluster stem joints for the design and development of a harvesting machine
pistachio harvest pull bending torsion strength
2008/11/12
A consideration in the design and development of any harvesting machine is to determine the physical and biomechanical properties of the tree and its fruit. Biomechanical properties such as tensile, b...
Soil strength of some Central Eastern Nigeria soils and effect of potassiumand sodium on their dispersion
Atterberg limits coefficient of linear extensibility clay dispersion Nigeria
2008/11/11
Five soils with variable clay contents were studied with the objective of describing their physical properties and the influence of NaCl and KCl on their dispersion. The soils were analyzed for parti...