OBJECTIVE To compare the technical quality of root canal obturation in relation to rotary and manual root canal preparation techniques. STUDY DESIGN Cross sectional, analytical study. PLACE AND DURATION OF STUDY The Aga Khan University Hospital Karachi from January till December 2011. METHODOLOGY Data was retrospectively retrieved by periapical radiographs of 60 root canal treated molars ...

Intensive management of pine plantations in the southeastern coastal plain typically involves weed and pest control, and the addition of fertilizer to meet the high nutrient demand of rapidly growing pines. In this study we coupled a mechanistic nutrient uptake model (SSAND, soil supply and nutrient demand) with a genetic algorithm (GA) in order to estimate the minimum addition of phosphorus ne...

in order to investigate the effect of concentration, time and consumption instruction of seaweed on some morphological characteristics of root and shoots of safflower, the present experiment in factorial form in a completely randomized design with three replications in research greenhouse of agriculture faculty, ferdowsi university of mashhad was conducted in 2014-15. factors examined included ...

Root responses to differences in availability of nitrogen and soil water were studied in loblolly pine (Pinus taeda L.) seedlings grown in monoculture and in competition with sweetgum (Liquidambar styraciflua L.) or crab grass (Digitaria spp.). Rhizotron cells were maintained at high soil water availability (approximately -0.1 MPa) or subjected to three dry-down cycles to low soil water availab...

in drought prone environments wheat crop growth and production depends strongly on the water stored in the soil before anthesis and, although some water remains in the soil after harvest, plants experience water deficit. in order to investigate whether water ex-traction patterns, as a plant feature, have a regulating effect on the amount of water used by them at different soil depths, three whe...

nitrogen and soil water were studied in loblolly pine (Pinus taeda L.) seedlings grown in monoculture and in competition with sweetgum (Liquidambar styraciflua L.) or crab grass (Digitaria spp.). Rhizotron cells were maintained at high soil water availability (approximately −0.1 MPa) or subjected to three dry-down cycles to low soil water availability (approximately −1.0 MPa), over two growing ...

tillage systems influence soil physical, chemical and biological characteristics which in turn may alter, root characteristics, growth, and development. a three year study was conducted to investigate the effects of seven tillage systems on some soil (fine-loamy mixed, typic haplocambids) physical characteristics and wheat (triticum aestivum l.) root morphology. tillage treatments included ...