The title compound, [Al2K2(C2H6N)8(C4H8O)] n , formed during the sonochemical reaction between Al(NMe2)3 and sodium-potassium alloy in the presence of tetra-hydro-furan (THF). Its asymmetric unit has two inequivalent K(+) sites. One site is coordinated by a THF ligand, and crystallizes as a
To clarify the effects of cotton straw returning on the composition and contents of nu-trients in different particle sizes of aggregates, two treatments with or without cotton straw returning were tested in continuous three years. After three years straw treatments, we collected undisturbed soil