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CAN A BLEND OF AMENDMENTS BE AN IMPORTANT COMPONENT OF A REHABILITATION STRATEGY FOR SURFACE COAL MINED SOILS?
Abraha, A.B., E.H. Tesfamariam, and W.F. Truter.
Sustainability 11: 4297(2019)

The role of different amendments to alleviate compaction problems in rehabilitated mine soils were quantified in this study using 5 single amendments and 3 different blends of amendments mixed thoroughly with degraded mine soil in a 1:3 (amendment:soil) ratio. Two additional unamended soils with different bulk densities (BD) were included as benchmarks. Amendment applications reduced BD by 4-20%, enhanced infiltration rate by 15-70%, increased porosity by 5-35% and increased plant available water (PAW) by 9-33% compared with the unamended soils. Between amendments, the blends of amendments reduced BD by 9-16%, enhanced infiltration rate by 17-59%, increased porosity by 6-32%, and PAW by 4-28% compared with single amendments. A blend of amendments had better soil restoration capacity through improving porosity, infiltration rate, and plant-available water. This article is Open Access at https://www.mdpi.com/2071-1050/11/16/4297.



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