EFFECT OF CONJUNCTIVE USE OF UNDERGROUND AND SURFACE WATER ON SOIL PROPERTIES, NUTRIENT UPTAKE AND YIELD OF WHEAT IN GHATAPRABHA COMMAND AREA
Loading...
Date
1998-08-19
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
An investigation was undertaken to study the seasonal underground
water quality and water table fluctuations in Raibag and Chikodi taluks
(Belgaum district) of Ghataprabha command. Further during rabi seasons
of 1995-96 and 1996-97, field experiments were carriedout in a farmers field
at Alaknur village (Raibag taluk) to study the various modes of conjunctive
use of underground and canal waters on soil properties, growth and yield of
wheat.
The analysis of underground waters revealed a shift from high salt
concentration in summer to lower levels in rainy season. Winter samples
exhibiting intermediate properties. Majority of the samples regardless of
season, belonged to C3S1 and C3S2 classes.
Among the twelve irrigation treatments adopted, namely T1 to T5 (one
to five canal irrigations followed by groundwater supplementation), T6 (canal
water alone), T7 (groundwater alone) and T8 to T12 (cyclic modes of canal
and groundwater usage). T7 exerted deleterious effects on soil physical
properties besides increasing in soil pH and electrical conductivity and
reduction in availability of primary nutrients, and their reduced uptake and
reductions in various agronomic growth and yield parameters. On the
contrary, T6 was the best of the treatments in respect of both soil properties
and crop growth and yield.
The treatments in receipt of four or five canal water irrigations followed
by groundwater supplementation (T4 and T5) under direct mode and those
with the use of these two waters at the ratios of 1;1 or 2:1 under cyclic pattern
of conjunctive usage, however, were found to be statistically not differing
from the best of the treatments (T6). With respect to germination on the
other hand, initial irrigation with groundwater was found harmful. Thus, it
is concluded from the investigations that the conjunctive pattern in the
manner as said above can be adopted without much harmful effect on soil
properties and yield of wheat during the periods of canal water shortages.
Description
Keywords
null