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Within a 300 x 600 m complex heterogeneous sodic grassland two techniques were compared for assessing soil salinity. The standard technique is based on repeated field instrumental measurements at 420 points. The alternative technique was performed with the use of numerical simulation of salt accumulation carried out on 3 profiles. These profiles have been selected as representatives of the distinct classes, or map strata of salt accumulation, distinguished with preliminary statistical clustering of the instrumental measuring points. Simulated values were extrapolated for the 3 strata distinguished. The maps obtained with the two techniques were statistically correlated. The use of numerical simulation is cost-effective. Further improvements are expected from a combination of improved numerical simulation and utilization of more strata.

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The aim of the study was to determine K-factors of homogeneous zones in palm-groves in order to make possible the interpolation of these values to other similar areas, and by this way to help the calculation of draining parameters. Another goal was to interpret the agronomical aspects of the results. Investigations for the determination of conductivity factors (K-factors) were carried out in the palm-groves of the Oued Rhir Valley. The measurements  - conducted three times - were made by the auger-hole method. After boring the hole, a perforated cylinder was placed into it to prevent falling in. K-factor values were calculated after van Beers. The mean of the three calculations was given as the end result for the K-factors. Our results show that K-factor values are influenced by the porosity, type, bulk density and texture of soils, their salt content and the form of gypsum. The K-factor was extremely high in case of sandy soils and soils containing crystallized gypsum. Water conductivity was moderate in case gley and pseudogley were located in deeper layers. The lowest values occurred when gypsum was found in cemented coherent particles. Salinization in deeper layers influenced hydraulic conductivity only in case it was associated with finer texture and airless layers. Besides date production, the traditional growing of nitrogen-fixing perennial legumes (alfalfa, Egyptian clover, melilot, etc.) in palm-groves is essential.  Systemic flooding irrigation decreases the salt content of soils, increases date and legumes yields. Legumes - by their root-system - improve the nitrogen balance, structure and water drainage of soils. The green parts of the cultivated legumes serve as fodder for animals (goats, sheep, cows), which turn it to manure. This manure increases the nutrient supply of the soils for palm-trees and vegetables. The positive results of stubble and root manuring (green manuring) of legumes is also confirmed by experiments on sandy soils. The elaboration of a good plant rotation is possible. At last, date and vegetables produced in this way could be sold better on the world market as bioproducts.

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309 Yao, A. R. (1983): Salinity resistance: physiology and prices. Physiol Plant. , 58 , 214-222. Salinity resistance: physiology and prices

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Acta Biologica Hungarica
Authors: Viktória Bőhm, Dávid Fekete, Gábor Balázs, László Gáspár, and Noémi Kappel

temperature tolerant rootstock genotypes for cucumber . J. Plant Physiol. 138 , 661 – 666 . 5. Cheeseuman , J. M. ( 1988 ) Mechanisms of salinity tolerance in plants

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Journal of Thermal Analysis and Calorimetry
Authors: Lidiane Pinto Correia, Elisana Afonso de Moura, Hallisson Meneses Pires, and Rui Oliveira Macêdo

, with different purposes [ 3 – 6 ]. This study aimed to evaluate the thermal characterization of different salinities water by DSC-cooling. Experimental Samples The samples were collected in Serra

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Akhani, H., Ghorbanli, M. (1993): A contribution to the halophytic vegetation and flora of Iran. pp. 35-44, In: Lieth, H., Al-Masoom, A.(eds.), Towards the Rational Use of High Salinity Tolerant Plants , Vol. 1

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baroreflex control of sympathetic activity during intravenous hypertonic saline infusions [ 14 ], which may counteract stimulatory effects of sodium and volume loading. Therefore, it is unclear what the effects of high sodium consumption with concomitant

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salt membranes. pp. 67-91. In: Staples, R. C., Toennissen, G. H. (eds), Salinity Tolerance in Plants. Strategies for Crop Improvement . J. Wiley & Sons, New York. Evidence for toxicity effects of salt membranes

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., Fattah, Q. A., Maniruzzanman, A. F. 1992: The effect of salinity on germination and its correlation with K, NaCl accumulation in germinating seeds of ( Triticum aestivum L.) C. V. Akbar. Plant Cell Physiol. , 33 , 1009

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Biological Development Co., Ltd. (purity: ∼99%). Saline (medical), Glucose (medical). Equipment and conditions Thermoanalyzer Systems (American Thermoanalyzer Companies Inc.) were used for determining the DSC–TG curves of

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