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Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Sep 2010, 31 (5) BackChanges in some soil
properties at different incubation periods
after tobacco waste application Soil Science
Department, Agricultural Faculty, (Received: Abstract: In this study, changes in organic
carbon (OC), basal soil respiration (BSR), nitrate nitrogen (NO3-N), electrical conductivity (EC) and aggregate stability (AS) of a
clay loam soil due to tobacco waste (TOW) application were monitored for 240
days. After incorporating 5% TOW into soil according to oven dry weight basis,
soil samples were incubated at field capacity for 20, 40, 80, 140 and 240 days
under a greenhouse condition. TOW application significantly increased all soil
properties over the control treatment. Soil OC and AS values had significant
positive correlations each other and with the other soil properties. Soil OC,
BSR and AS values significantly increased from 0.12%, 0.03 mg CO2-C
g-1 dry soil 24 hr and 20.7% in control treatment to 1.13%, 3.7 mg CO2-C
g-1 dry soil 24 hr and 54.4% in TOW treatment, respectively, in 20
days. While the highest NO3-N (1780 ppm)
was found in 40 days, the highest EC (3.35 dS m-1)
was in 240 days after TOW application. Disaggregation
occurred in all treatments after 20 days of incubation due to probably the more
substrate demands of microorganisms in soil.
Key words: Tobacco waste, Aggregate stability, Basal soil
respiration, Nitrate, Electrical conductivity PDF of full length paper
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