National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
This experiment was carried out to investigate the stabilizing influence organic amendments on soil reaction and micronutrient availability. Three different soil types (viz. acid, neutral and sodic soil) were considered for our experiment to represent soils of the whole country. Soils were incubated with FYM and vermicompost at different doses and incubated at field capacity for 4 weeks. Subsamples at predetermined duration were analyzed for soil reaction, organic carbon (OC), available micronutrients, microbial biomass carbon and nitrogen. The pH for acid soil was found to increase from 5.40 to 5.91, whereas it showed a decreasing trend for neutral (from 7.58 to 7.09) and sodic soil (from 9.36 to 8.81). This change of pH was closely related with change in soil OC content at different durations. However acid and neutral soil reported stronger correlation (R2=0.93 and 0.94 respectively) than sodic soil (R2=0.71). All three soils contained micronutrient well above the critical limit, indicating higher availability of them. Still their content was significantly modified during the entire experiment. However the modification was not merely similar for all the micronutrient, and varied according to their elemental chemistry. The concentration of available Fe (12.11-15.26, 7.51-8.46 and 6.37-7.93 mg/kg soil for acid, neutral and sodic soil respectively) and Mn (4.4-5.03, 2.15-4.02 and 3.08-4.5 mg/kg soil respectively) was increasing initially and then started to decrease with time. Micronutrient Zn was increasing (8.76-11.15, 7.85-10.10, 2.86-5.45 mg/kg soil for acid, neutral and sodic soil respectively) throughout the duration, whereas soil available Cu content decreased steadily (1.87-1.10, 1.59-0.99, 1.46-0.93 mg/kg for acid, neutral and sodic soil respectively). All the micronutrient was well correlated to changes in soil pH and OC. However their strength varied in terms of soil type and micronutrient in consideration.
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