A new tripodal ligand, N, N, N′, N′, N″, N″-hexaisopropyl-2, 2′, 2″-nitrilotris (2,1-ethoxy)-triacetamide (L) and its new erbium picrate complex were prep
The effects of rare earth on the growth of rice,rape and soybean in three kinds of soils were studied with the method supposed by Economic Co-operation and Deve