EFFECT OF CONJUNCTIVE USE OF WATER ON SOIL PROPERTIES AND YIELD OF MAIZE IN GHATAPRABHA LEFT BANK COMMAND AREA
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Date
2005
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD
Abstract
"A field experiment was conducted to study the effect of conjunctive use
of water on soil properties and yield of maize in Ghataprabha Left Bank
Command Area during kharif 2003 on a farmer's field at Nandagaon village
of Mudhol taluk in Bagalkot district.
The experiment consisted of five main plot (irrigation) treatments :
Ti - BW only (borewell water); T2 - 5 BW : 1 CW (canal water); T3 - 4 BW :
2 CW; T4 - 3 BW : 3 CW; T5 - 2 BW : 4 CW and four sub-plot (amendments)
treatments: Si - Control; S2 - Application of FYM @ 10 t ha'^; S3 - Gypsum
application @ 1.36 t ha-i; S4 - Application of FYM @ 10 t ha-i + gypsum
@ 1.36 t ha-i. The experimental soil was alkaline, medium in organic matter
and available nitrogen, high in available phosphorus and potassium.
The growth and yield parameters such as plant height, leaf area index,
total dry matter, number of grains per cob, test weight and grain yield
were significantly higher in T5 (2 BW : 4 CW) than Ti (BW only). The highest
jdeld was recorded in Ts (53.99 q/ha) at the lowest yield in Ti (50.64 q/ha).
Among the sub-plots, 84 (FYM + gypsum) recorded higher growth and yield
parameters and uptake of nutrients than Si and were on par with S2 (FYM).
The uptake of nutrients such as N, P, K, Ca and Mg was higher in T5 (2 BW :
4 CW) than Ti(BW only).
The physical properties were slightly affected by application of borewell
water (Ti). The salt content of soil determined after each irrigation was lower
in Ts plot than Ti plot. Among the sub-plots receiving amendments, S4 (FYM
+ gypsum) recorded lower salt content than Si (control). The net returns and
B:C ratio were found to be higher in treatments with no amendment. From
the study, it can be inferred that either 2 BW : 4 CW or 3 BW : 3 CW modes of
irrigation along with the application of amendments found to be good for
sustainable maize production in areas where there is a short or delayed
supply of canal water."
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