a field study was conducted to evaluate the agronomic response of eight isolines of cv. clark on a clay loam soil (at karaj-iran, 35048´) to four plant population densities of 11.3, 18.5, 68.5, and 103.4 plants per square metre. significant yield increase was obtained as a result of higher plant density. differences among the cv. clark isolines were significant (p

black saxaul (haloxylon aphyllum) is one of the best options for rehabilitating drought affected desert lands. the species is remarkably adapted to the central dry environment ofiran and a major source of raising pasture productivity of the areas. progenies of 25 randomly selected black saxaul trees from four populations of the species were studied in a randomized complete block design with thr...

partitioning of photoassimilates between the sinks is one of the most important physiological processes related to the yield of crops which are affected by drought stress. therefore, the effect of drought stress in flowering and grain filling stages, on the percentage partitioning of photoassimilates among different organs was studied in 14 rapeseed cultivars in a split plot experiment based on...

The architecture of modern image-compression algorithms built upon the embedded coding of wavelet coefficients is reviewed. The production of coefficients from wavelet filter banks is described along with the subsequent partitioning into significant and insigificant coefficient sets via bitplane coding. An overview of the zerotree and contextconditioning mechanisms for coding binary maps of sig...

Sequential extraction and radiotracer analyses were used to evaluate the geochemical partitioning of metals (Pb, Cd, Cr, and Cu) in the sediments of Lake Victoria to partition the contribution of catchment areas. Highest total concentration and enrichments of Pb, Cd and Cr occurred near river inlets from polluted urban areas discharging municipal effluents into the rivers. Partitioning coeffici...

A common application of multilevel models is to apportion the variance in the response according to the different levels of the data.Whereas partitioning variances is straightforward in models with a continuous response variable with a normal error distribution at each level, the extension of this partitioning to models with binary responses or to proportions or counts is less obvious. We descr...

Henry's Law constants (HLCs) of several common, subsurface hydrophobic organic pollutants (HOPs) including trichloroethylene (TCE), perchloroethylene (PCE) and benzene, toluene, ethylbenzene, and o-xylene (BTEX), were measured using a static headspace phase ratio (SHPR) method over a range of temperatures (35, 45, 55, and 65 degrees C) and experimentally and operationally relevant cyclodextrin ...

The United States Geological Survey has been researching generalization approaches to enable multiple-scale display and delivery of geographic data. This paper presents automated methods to prune network and polygon features of the United States high-resolution National Hydrography Dataset (NHD) to lower resolutions. Feature-pruning rules, data enrichment, and partitioning are derived from know...

A community in a large, real-life network, such as the World Wide Web (Web), has been broadly defined as a group of nodes that are densely linked with each other, while being sparsely linked with the rest of the nodes. In the last 2-3 years, community-mining in such networks has emerged as a problem of great practical significance. This problem has been framed in at least two different versions...

This study shows that revising the reaction rate of NO2+HO q →HNO3 improves simulated nitrogen partitioning and changes the simulated radiative effects of several short-lived climate forcers (SLCF). Both laboratory and field study analyses have found that the reaction rate should be reduced by 13–30 % from current recommendations. We evaluate the GEOS-Chem model over North America with and with...