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Impact of water temperature and structural parameters on the hydraulic labyrinth-channel emitter performance
manufacturer’s coefficient of variation emission uniformity
2014/10/28
The effects of water temperature and structural parameters of a labyrinth emitter on drip irrigation hydraulic performance were investigated. The inside structural parameters of the trapezoidal labyri...
Attempt to use the SWATREZ and UNDYS models for the simulation of ground water pollution in agrosystems irrigated by municipal sewage
modelling waste water ground water nitrogen hydromorphic soil
2008/12/2
For the simulation of water movement and pollutant transport in the hydromorphic soil profile two numerical models SWATREZ and UNDYS were used. These models are based on water movement in porous mater...
Evaporation of magnetically treated water and NaCl solutions
water evaporation magnetic treatment ma- gnetohydrodynamics NaCl solutions
2008/12/2
This study was designed to evaluate the effects on evaporation of distilled water and tap water subjected to magnetic treatment for different periods of time. Evaporation of NaCl solu- tions magnetica...
Scaling of two-phase capillary pressure-saturation relationships: water-air and oil-air systems
immiscible phases capillary pressure-satura- tion relationship interfacial tension scaling
2008/12/2
Solutions of various problems related to soil contamination by nonaqueous phase liquids (NAPL) require a knowledge of capillary pressure-saturation relationships. In soil-water-air systems, this rela...
Soil water, solute storage and drainage in a deeply loosened, heavy-clay soil of southern Romania
leaching internal drainage soil water flux
2008/12/2
One year after draining and extensively loosening heavy-clay soils, irrigation water was sprinkled over it daily for 10 h for a 3-day period, using a 10 mm h-1 rate, perpendicularly over plastic drain...
Spatial characteristics of water conductivity in the surface level of Polish arable soils
water conductivity Polish arable soils
2008/12/2
The research presents spatial characteristics of water conductivity in the arable layer of Polish soils. It was found that the lowest water conductivity is 0.00087 cm day? and the highest ?5900 cm day...
Distribution of carbohydrate pools within water-stable aggregates of an Ultisol in Southern Nigeria
carbohydrate concentrations water-stable aggregates Nigerian Ultiso
2008/11/26
R-CHOc, irrespective of the type of amendment. The distribution of the carbohydrate fractions within the water-stable aggregates generally decreased with increasing time of sampling. At the 3rd and 6...
Aggregate water stability of sandy and clayey loam soils differently compacted with and without wheat plants
soils texture roots compaction aggregation
2008/11/26
The objectives of our studies were to: 1) estimate the effects of compaction of sandy loam and clayey loam soils on growth parameters of winter wheat plants, 2) evaluate the resilien- ce capacity of t...
Aerobic conditions and antioxidative system of Azolla caroliniana Willd.in the presence of Hg in water solution
Azolla Hg ODR oxygen availability superoxide dismutase
2008/11/26
Heavy metals are among the toxic substances for plants. Their presence causes a state called “heavy metals stress” which manifests itself by many physiological changes in plants. One of them...
Adsorption of water vapour on montmorillonite: grand canonical ensemble monte carlo simulations
water vapour montmorillonite Grand Canonical Ensemble Monte Carlo simulation
2008/11/26
The Grand Canonical Ensemble Monte Carlo simulation method is applied to study adsorption of water vapour on external and internal surfaces of sodium montmorillonite. The model uses MINDO water-clay a...
ACCESS-II: a detailed model for crop growth and water conditions
mode soil water use crop growth climate change
2008/11/26
ACCESS-II contains a detailed model of crop growth and soil water use, for use within small areas and with detailed soil and cropping data. The principles behind the detailed model are described. Vali...
A comparison of oxygen diffusion rates in sand moistened with water or peg 20000 solution
ODR PEG solutions water/sand/air mixtures
2008/11/26
Oxygen diffusion rates (ODR) were measured in water/sand/air and PEG solution/sand/air mixtures, spanning a range of liquid/solid/air volume ratios. Replacement of water with PEG solution as the liqu...
About the biophysical mechanisms of the long-distance water translocation in plants
plant s water minera components assimilates transport mechanisms
2008/11/26
The present work discusses the basie mechanisms of water translocation on the so-called long distances. The translocation includes: transfer of water and minera?components across the root (from the so...
Aspects of red soil properties and water management in China
soil water red soil in China
2008/11/26
This paper is a brief reviev of studies on red soil water properties and its management in the tropics and subtropics of China. Although annual precipitation is more than evaporation, there is still s...
Attempt of water retention characteristcs estimation as pedotransfer function for organic soils
organic soils pedotransfer functions water retention
2008/11/26
This paper presents the results of statistical-physical modelling (pedotransfer function) relating soil water content at defined values of soil water potential to selected physical and chemical parame...