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This work presents the use of models HZAR and IRRDEC to describe water flow in soil, taking into account water uptake by plants and boundary conditions. The equations were used to calculate moisture dynamics in layered soil profile containing a variable drain pipe spacing (programme HAZAR). The paper presents also a subroutine IRRDEC used to simulate the time and amount of water necessary to perform...
The empirical verification of TRANSP and TERGRA models was the main purpose of conducted researches. The models introduced in this paper describe the diurnal patterns of leaf temperature and transpiration when grass is exposed to increasing water deficit under field conditions. The difference simulation results of leaf water potential, leaf temperature and transpiration flux for low and high soil...
The value of hydraulic conductivity (K) has considerable theoretical and practical significance for the water economy of soils and plants. Measurements of hydraulic conductivity conducted for peat soils in the process of soil monolith drying and wetting indicated the occurrence of capillary hysteresis in the soils under study. Data presented in the paper may indicate that the phenomenon is directly...
The aim to this paper was to estimate the influence of suction force or the level of the ground water table on the growth and distribution of roots and on yielding of grass. It was noticed that suction force influences the growth of root mass which in turn determines yielding of grass. The results of the crops of dry mass of hay as dependent on the depth of the ground water table show that high moisture...
The Podlipie valley constitutes a typical example of river valleys of the Lublin Upland situated among loess formations fed with underground waters. The aim of the respective investigations was to estimate the functioning efficiency of the existing reclamation networks, to recognize the causes of an exessive moisture and, if possible, to suggest the ways of leading off the excessive water amounts...
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