Nabil Allataifeh

University of Guelph | UOGuelph · School of Engineering

In humid regions, surface runoff is often generated by saturation-excess runoff mechanisms from relatively small variable source areas (VSAs). However, the majority of the current hydrologic models are based on infiltration-excess mechanisms. In this study, the AGricultural Non-Point Source Pollution (AGNPS) model was used to integrate the VSA conc...

Hot-spots and hot-moments of phosphorus loads in an agricultural watershed depend not only on thewatershed characteristics but also on the type and intensity of storms. Not all storms will generate phos-phorus that can be considered problematic. A threshold storm is thus proposed and defined as the max-imum storm intensity in which the phosphorus g...

Water security is the capability of a community to have adequate access to good quality and a sufficient quantity of water as well as safeguard resources for the future generations. Understanding the spatial and temporal variabilities of water security can play a pivotal role in sustainable management of fresh water resources. In this study, a long...

Identifying critical source areas of phosphorus from selected small, agricultural watersheds of Ontario, Canada using different models

Assessment of Water Security using Blue and Green Water footprint concept in Grand River Watershed

Utilization of minerals such as zeolites as substrates for horticultural crop production has been receiving considerable attention. A growth chamber experiment was conducted to determine the response of croton grown in a substrate composed of a mixture of zeolitic tuff, peatmoss, and perlite at a ratio of 1:1.5:1.5 by volume, respectively, to diffe...

Stage of maturity can influence germination and dormancy of common vetch seeds. This experiment was initiated to study the seed germination and dormancy of fresh and air-dried seeds of common vetch and the methods to overcome seed dormancy during seed maturation. Pods were harvested at five developmental stages ranging from mid-seed fill (the seeds...

Bitter vetch is an important legume crop cultivated for forage and seed yield in the Mediterranean, West Asia, and North Africa regions. Delaying seed harvest of bitter vetch may increase seed losses due to pod shattering; however, early harvest may influence seed dormancy and the ability of seed to germinate. Field experiments were conducted at tw...

Field experiments were conducted to detect the influence of varying N rates and weed control methods and 2, 4-D ester which was applied at two growth stages on yield, yield components, and phenological traits of barley. Among N rates significantly highest grain yield (2112.5 kg ha‾¹) was obtained under 120 kg N ha‾¹...

Peatmoss-perlite (PP) was mixed with pre-charged zeolitic tuff (Z) at different ratios (Z, 3Z:1PP, 1Z:1PP, 1Z:3PP, and PP) (v/v). Rooted cuttings of "Aceton" croton (Codiaeum variegatum Blume) were planted in the substrates and grown under controlled conditions. During the 4-month experiment, substrates were allowed to dry via evapotranspiration to...