Ck2 buy some land of mine5/28/2023 T4-T5 followed the same pattern as Group 1 except that the lower subsoil layer was 25 cm thick. Group 2 treatments (T4–T7) consisted of 40 cm subsoil. ![]() Group 1 treatments (T1–T3) had a 15 cm layer of subsoil immediately below the topsoil, underlain, respectively, by progressively thicker gangue layers (20, 30, and 40 cm) overlying another 15 cm subsoil layer, in turn underlain by gangue. CK2 consisted of 50 cm gangue covered by topsoil and 40 cm subsoil. All treatments had a 30 cm surface layer of topsoil. Two control treatments and eight experimental treatments were constructed. ![]() A field experiment was established to evaluate performance of varying layered combinations of soil and coal gangue materials as measured by maize ( Zea mays L.) growth and yield. Rehabilitation of areas impacted by subsidence following coal mining is a pressing need in eastern China, especially where availability of suitable soil material is limited.
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