in order to study the effects of rate and application time of nitrogen on grain yield of rainfed wheat, water use efficiency of rain (wue), nitrogen agronomic efficiency (nae) and soil moisture depletion (smd), one experimental farm was carried out in kurdistan province during 2012-2014. tratments were five rates of nitrogen (n0, n30, n60, n90 and n120) kg.ha-1 as urea with three application ti...

Goal To investigate the evolution and stability of mutualistic interactions based on changing interaction topologies, spatially heterogeneous habitats, asymmetries in partner numbers, and processes of partner fidelity and partner choice. Numerous effects sustaining cooperation have been identified since the very first models of cooperation and mutualistic interactions were published. In particu...

The diagram showing off-center nested spheres which is traditionally used to illustrate the Doppler effect, misleading and its trigonometric analysis leads errors concerning light, because electromagnetic aberration effects conform a wavefront surface that not sphere but an ellipsoid stretched along trajectory of source. Cartesian polar equations spherical ellipsoidal wavefronts are compared he...

Background and Aims: Candida albicans (C. albicans) is the most common opportunistic human pathogen. Therapeutic options for Candida infections are limited to available antifungal drugs. The aim of this study was to investigate the effects of fluconazole/clotrimazole (FLU/CLT) on C. albicans hyphae formation. Materials and Methods: We have established the effectiveness of the combination of FL...

AbstractThe purpose of this study was to investigate the controllable operating parameters influence, including pH, solid content, collector, co-collector, and depressant dose, and conditioning time, on apatite flotation kinetics. Four first order flotation kinetic models are tested on batch flotation time-recovery profiles. The results of batch flotation tests and the fitting of first-order ki...

in order to determine yield stability and evaluation of genotype × environment interaction, 20 spring bread wheat promising lines and varieties were studied in a randomized complete block design with three replications in four warm and dry stations (ahwaz, dezful, darab, & khorramabad) during 2002-2004. chamran cultivar was a check in two years trial. the results revealed that the grain yield o...

in order to study the effects of co2 enrichment on growth and competitiveness of soybean (glycine max) and millet (panicum miliaceum) against redroot pigweed (amaranthus retroflexus) and lambsquarter (chenopodium albam) an experiment was conducted using two co2 concentrations (350 and 700 ppm). for evaluating effects of co2 variation on inter-and intra-specific competition plants were grown in ...