Results 201 to 210 of about 2,384 (234)

Comparing the classical permanent wilting point concept of soil (−15,000 hPa) to biological wilting of wheat and barley plants under contrasting soil textures

Agricultural Water Management, 2020
Abstract Recent studies have shown that the permanent wilting point is influenced by soil properties and plant drought-tolerance mechanisms. This study was designed to evaluate the soil matric potential at which the biological wilting point (BWPplant) of wheat and barley cultivars occurs compared to the classic concept of the permanent wilting point ...
Renato P de Lima, Cassio Antonio Tormena
exaly   +2 more sources

The relationship between surface fractal dimension and soil water content at permanent wilting point

Geoderma, 2009
Abstract Permanent wilting point (PWP) is an important soil water parameter available from the soil water retention curve. Soil water content held at 1500 kPa determines plant survival or death. Recently, the application of fractal geometry concepts has been widely used for modeling soil and its hydraulic properties (e.g.
H Millán
exaly   +2 more sources

Application of firefly algorithm-based support vector machines for prediction of field capacity and permanent wilting point

Soil and Tillage Research, 2017
Abstract Soil field capacity (FC) and permanent wilting point (PWP) are significant parameters in numerous biophysical models and agricultural activities. Although these parameters can be measured directly, their measurements are quite expensive. The purpose of this study was to develop a hybrid Support Vector Machine (SVM) combined with Firefly ...
Mohammad Ali Ghorbani, Shahaboddin Shamshirband, Hossein Bonakdari   +2 more
exaly   +2 more sources

Modelling and prediction of soil water contents at field capacity and permanent wilting point of dryland cropping soils

Soil Research, 2011
Field capacity (FC) and permanent wilting point (PWP) are two critical input parameters required in various biophysical models. There are limited published data on FC and PWP of dryland cropping soils across north-western Victoria. Direct measurements of FC and PWP are time-consuming and expensive.
M. A. Rab, S. Chandra, P. D. Fisher, N. J. Robinson, M. Kitching, C. D. Aumann, M. Imhof   +6 more
openaire   +2 more sources

Spatial predictions of the permanent wilting point in arid and semi-arid regions of Northeast China

Journal of Hydrology, 2018
Abstract The permanent wilting point (PWP) is the minimal point of soil moisture a plant requires not to wilt. If moisture decreases to this, or any lower point, a plant wilts, and can no longer recover its turgidity when placed in a saturated atmosphere for 12 h.
Shuai Wang, Hongtao Zou, Jing An
exaly   +2 more sources

Pedotransfer functions for estimating the field capacity and permanent wilting point in the critical zone of the Loess Plateau, China

Journal of Soils and Sediments, 2018
Field capacity (FC) and permanent wilting point (PWP) are important physical properties for evaluating the available soil water storage, as well as being used as input variables for related agro-hydrological models. Direct measurements of FC and PWP are time consuming and expensive, and thus, it is necessary to develop related pedotransfer functions ...
Yuanjun Zhu, Xiaoxu Jia, Laiming Huang   +2 more
exaly   +2 more sources

A RBF Neural Network applied to predict soil Field Capacity and Permanent Wilting Point at Brazilian coast

2015 International Joint Conference on Neural Networks (IJCNN), 2015
The purpose of this paper was to evaluate the performance of pedotransfer functions generated by Radial Base Function (RBF) Artificial Neural Network (ANN) to estimate soil water retention at field capacity (FC, suction at −30 kPa) and Permanent Wilting Point (PWP, −1500 kPa) for soils at PROJIR area -RJ/BR.
Diego B Haddad, Marcos Bacis Ceddia
exaly   +2 more sources

Estimating Permanent Wilting Point in the Field by a Direct Laboratory Calibration

Soil Science Society of America Journal, 1958
Abstract A method is described whereby soils may be calibrated with fiberglass soil moisture units at 15‐atm. tension using the pressure membrane apparatus. Moisture units to be installed in the field were first calibrated in a shallow pan with a bulk soil sample taken from the site of the proposed field installation.
Gerald L. Lowry
openaire   +2 more sources

Modelling Soil Water Contents at Field Capacity and Permanent Wilting Point Using Artificial Neural Network for Indian Soils

The National Academy of Sciences, India, 2015
Soil field capacity (FC) and permanent wilting point (PWP) are important input parameters in many bio- physical models. Although these parameters can be mea- sured directly, their measurement is quite difficult and expensive. Pedotransfer functions (PTFs) provide an alternative by estimating soil parameters from more readily available soil data.
M Mohanty, R S Chaudhary, Mohanty M
exaly   +2 more sources

Impacts of soil type and crop species on permanent wilting of plants

Geoderma, 2021
The lack of a continuous network of water-filled pores necessary for the flow of water in the soil has been related to the wilting of plants as well as to the limitations of soil sample equilibrium in pressure plates.
Thomas Keller, Cassio Antonio Tormena
exaly   +2 more sources