搜索结果: 1-13 共查到“农学 curve”相关记录13条 . 查询时间(0.136 秒)
Optimal slaughter weight of pigs assessed by means of the asymmetric S-curve
pigs feeding regime growth prediction non-linear models
2015/6/5
The present study was carried out on 68 barrows equally distributed into two different feeding groups (intensive and restricted). MR tomography was used to obtain data needed for the calculation of op...
Effects of vegetation type and horizontal curve radius on the rate of tree pruning to provide line of sight on main access roads
tree pruning vegetation type sight line
2015/5/5
The present investigation was carried out to assess the influence of vegetation type and horizontal curve
radius on the rate of tree pruning to provide the line of sight on horizontal curves in Casp...
Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading
force deformation oil bearing crops mathematical model compression volume energy
2014/2/24
The analysis of tangential curve equation for describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture
under compression loading were discussed. Parameters considered in this study i...
A Practical Estimating Method of the Dose-Response Curve between Inoculum Density of Plasmodiophora brassicae and the Disease Severity for Long-term IPM Strategies
clubroot crop rotation disease control population dynamics
2010/10/25
A model was developed to evaluate long-term temporal changes in disease severity (DS) of the clubroot disease of Chinese cabbage in the field with various management strategies. The model consists of ...
不同土层土壤水分特征曲线的空间变异及其影响因素（Spatial Variability of Soil Water Retention Curve in Different Soil Layers and Its Affecting Factors）
土壤水分特征曲线 空间变异 多重分形
2010/1/28
利用多重分形和联合多重分形方法，对陕西杨凌地区0～20cm和20～40cm土层van Genuchten模型参数的空间变异性及其影响因素进行了研究。结果表明：0～20cm和20～40cm土层参数α都具有明显的多重分形特征，空间变异性较强，且分别是由低值和高值分布引起的；参数n和θs的多重分形特征不明显，空间变异性较弱。0～20cm和20～40cm土层van Genuchten模型参数与土壤物理特性...
Construction of a Volume Table for Evergreen Broad-leaved Trees with Pipe Model Theory and Relative Stem Curve: A Case Study in the Tokyo University Forest in Chiba,Japan
branch broad-leaved tree pipe model relative stem curve volume table
2009/8/28
In this paper we constructed a volume table for broad-leaved trees including a stem and branches using a relative stem curve, provided that the trees are subject to the pipe model theory. First we mea...
The Effect of Forest Cutting on Flow Duration Curve of Mountainous Small Watershed:Evaluation of the Influence of Vegetation on Inter-watershed Variation in Flow Duration Curve
change in water yield flow duration curve forest cutting Fukuroyamasawa watershed paired watershed method
2009/8/24
We used the paired-watershed method to analyze changes in the flow duration curve after forest clear-cutting in the Fukuroyamasawa Experimental Watershed (35°12′ N, 140°06′ E) in University Forest, Ch...
Effect of Fertilization Application Levels Based on the Nitrogen Application Standard Curve on Cut Flower Quality and Nutrient Uptake of Spray Chrysanthemums in Bench Culture
Nutrient Chrysanthemums Bench Culture Fertilization
2009/7/14
The effects of nutrient application based on the nitrogen application standard curve (NASC) developed in the hydroponics system on the cut flower quality and nutrient uptake of spray chrysanthemums in...
Analysis of Iodine Absorption Curve of Starch by Chemometrics to Evaluate the Eating Quality of Rice
Amylose Amylopectin Auto-Analyzer Rice Consistency λmax
2009/7/7
The amylose content of milled rice is usually determined colorimetrically by the iodine test. An automatic analyzer was developed to obtain the iodine absorption spectrum ranging from 400 to 900 nm. T...
Predicting the soil water retention curve from readily-a vail able data obtained during soil surveys
model pedotransfer functions van Genuchten equation soil water retention
2008/11/13
Averages and coefficients of variation of the parameters of the van Genuchten equation were estimated, in relation to a large dataset, for soil particle-size classes differentiated according to the pr...
Relationship between van Genuchten’s parameters of the retention curve equationand physical properties of soil solid phase
water retention curve van Genuchten’s parameters pedotransfer functions
2008/11/12
Van Genuchten parameters were determined for 24 Phaeozems and 54 Gleysols samples taken from surface, subsurface and subsoil horizons. No evident dependences between van Genuchten’s parameters and th...
Monitoring variation among faba bean rhizobium isolates. Growth curve, exo-polysaccharides and antibiotic resistance
Rhizobia Growth curve Exo-polysaccharides (EPS) intrinsic antibiotic resistance (IAR)
2010/11/11
Three Rhizobium leguminosarum isolates were selected from forty root nodules of faba bean
plants sampled from different locations. Different types of growth were observed i.e., gum punctiform and tra...
IS THE J-CURVE EFFECT OBSERVABLE IN TURKISH AGRICULTURAL SECTOR?
trade balance exchange rate agricultural sector
2010/12/2
This paper investigates whether or not the J-curve hypothesis holds in Turkish agricultural sector. The analysis is conducted using the model the most commonly employed in j-curve literature. Based on...