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Studies on reclamation of sodic soils through distillery spentwash

KrishiKosh

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Title Studies on reclamation of sodic soils through distillery spentwash
 
Creator A.C.Mahendra
 
Contributor B.I.Bidari
 
Subject Soil Sciences and Agri Chemistry
 
Description An investigation was undertaken to study the feasibility of utilizing distillery raw
spentwash as an amendment for the reclamation of calcareous/non-calcareous sodic soils.
Two pedons each in calcareous and non-calcareous sodic soils were choosen and detailed
characterization of these four pedons was taken up.
Laboratory incubation study was conducted for the first two depths of calcareous/noncalcareous
sodic soils, to fix the quantity of raw spentwash required to reduce the ESP to a
desired level that is equivalent to 100% GR of soils. A pot culture experiment was also
initiated with sunflower as test crop to study it’s performance in raw spentwash amended
calcareous sodic soils.
Incubation studies revealed that, in calcareous sodic soils pH and ESP were reduced
to a desired level but same was not true in non-calcareous soil. Three lakh litres per ha of raw
spentwash was found to be optimum to reduce the ESP to 11. There was sudden decrease in
pH, ESP and free lime content initially (5th DAI). Later, the reduction was gradual and
desired ESP and pH were observed after 30th DAI.
Pot culture studies indicated that 125% (3.75 lakh litres/ha) raw spentwash application
resulted in highest growth attributes and uptake of nutrients at both 30th and 60th DAS. This
was on par with 100% raw spentwash (3 lakh litres/ha). Soil analysis of pot culture study (at
60 DAS) indicated that both pH and ESP were reduced to a safe level in 125% and 100% raw
spentwash treatments. There was slight build up in salt content of soil but it was below the
critical limit (4 dS/m) in all the treatments. It can be concluded that three to four lakh litres
per ha of raw spentwash was found to be optimum to reduce the ESP to a desired level in
calcareous sodic soil.
 
Date 2016-10-25T15:31:26Z
2016-10-25T15:31:26Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81898
 
Format application/pdf
 
Publisher UAS, Dharwad