Record Details

Estimation of Water Retention Characteristics of Shrink-Swell Soils using Pedotransfer Functions

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Estimation of Water Retention Characteristics of Shrink-Swell Soils using Pedotransfer Functions
Not Available
 
Creator N.G. Patil, Jagdish Prasad, Rajeev Srivastava and S.A. Dhale
 
Subject Soil water retention, pedotransfer functions, VG parameters, Rosetta
 
Description Not Available
The shrink-swell soils under orchards (irrigated) over a long period develop unique hydraulic characteristics.
As a case study, water retention characteristics of sweet orange growing soils were analyzed to define their
analytical behaviour so that simulations can be made for projecting changes. Soil water retained (θ) at seven
varied matric potentials (h) namely 33, 50, 75, 100, 400, 800, 1500 kPa was measured in the laboratory and
seven water retention functions proposed by different researchers were fitted to the laboratory measured
data. It was also observed that the h-θ relationship proposed by van Genuchten (VG) fitted better for these
soils. Pedotransfer function (PTF) ‘Rosetta’ (computer code) was used to predict VG parameters from basic
soil data. The parameters estimate suggested that the soils were unique in hydraulic behaviour. It was
observed that the residual soil-water content Θr and saturated soil-water content Θs were lower in magnitude
as compared to the class values. The estimates of VG parameters were used to predict soil-water retention at
varied suction pressure(s). Observed and predicted values of soil-water retention were compared to evaluate
the performance of Rosetta. The coefficient of determination (R2 0.88) values suggested that it could predict soil-water retention in lower suction range with relatively greater accuracy. Comparatively better predictions were obtained with basic data on texture, bulk density and field capacity as an input.
Not Available
 
Date 2024-07-01T11:03:31Z
2024-07-01T11:03:31Z
2009-06-01
 
Type Research Paper
 
Identifier N.G. Patil, Jagdish Prasad, Rajeev Srivastava and S.A. Dhale
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/83826
 
Language English
 
Relation Not Available;
 
Publisher Not Available