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Municipal Solid Waste Compost: a potential amendment for saline-sodic soils

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Title Municipal Solid Waste Compost: a potential amendment for saline-sodic soils
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Creator Parul Sundha, Arvind K. Rai, Nirmalendu Basak, R.K. Yadav and D.K. Sharma
 
Subject Municipal Solid Waste Compost, gypsum, saline-sodic soil, reclamation
 
Description Not Available
Competing demands for the use of quality gypsum by other
industrial sectors has necessitated the search for alternate
amendments for sodic soils. Municipal Solid Waste Compost
(MSWC) as conditioner has the potential for improving the
physical, chemical and biological properties of the sodic soils.
Considering these bene􀃶cial effects, the Hon'ble Supreme Court
of India has also mandated the application of MSWC to maintain
the soil health that may also ensure the safe disposal of this urban
waste. Therefore, this study explored the potentiality of MSWC in
the reclamation of saline-sodic soil irrigated with high SAR
irrigation water. Conventional amendments gypsum (G) viz.,
GR25 (25% gypsum requirement), GR50 and its combination with
-1 10 and 20 t ha of farmyard manure (F) and MSWC of Karnal (KC)
and Delhi (DC) origin were incubated with soil for one month at
60% 􀃶eld capacity. After 30 days of incubation, a soil column
leaching experiment was carried out with completely
randomized factorial design in triplicate. Columns were
sequentially leached up to ten pore volumes of synthetic saline
−1 water having 􀃶xed EC of 6 dS m with variable SAR of 10 and 15 iw
1/2 −1/2 mmol L . Nature, quantity and independent integration of
amendments had a positive in􀃸uence as evident from the
decrease in soil alkalinity and leaching of salts. Unamended soil
had high pH than amended soil. Leaching with saline water
released an appreciable quantity of electrolytes from the soil. The
+ - 2- ionic balance analysis indicated an increase in Na , Cl , CO in 3
2+ 2+ + leachates with increase in SAR while contents of Ca , Mg , K ,
2- - SO declined and that of HCO did not change. Leaching with 4 3
different SAR waters had considerable in􀃸uence on decrease in
both pH and EC. Decrease in leachate pH was the maximum with
the use of GR DC followed by GR DC and the least in control. 25 20 25 10
Changes in pH and EC showed inverse relation at different soil
depths. Among the different combination of amendments, GR 25
-1 + DC (20 t ha ) treated soil showed greatest reduction in both soil
pH and EC irrespective of water SAR.
Not Available
 
Date 2018-09-13T19:13:00Z
2018-09-13T19:13:00Z
2016-07-01
 
Type News Letter
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/6765
 
Language English
 
Relation Not Available;
 
Publisher Not Available