The Global Maize project was initiated in 2011 in Rostov Oblast (Southern Russia) on a common chernozem. Maize-soybean crop rotation is studied at the A-site. Grower fertilizer practice for maize and soybean includes a preplant application of N30P40 and N20P40, respectively (N, P₂O₅, K₂O are indicated here). The Ecological Intensification (EI) treatment for maize was designed as N85P70K40 (plus seed coating with Zn) that includes a preplant application of N50P50K20, a starter application of N5P20К20 and N30 sidedressing. The EI treatment for soybean consists of a preplant application of N30P45К30, seed inoculation (1^st growing season) and treatment with Mo. The following fertilizer treatments are applied at the maize C-site: 1) control, 2) N30P40 (grower fertilization practice), 3) N100P80К60 (ample NPK rates), 4) N18P80К60, 5) N100К60, 6) N100P80. There are no real zero N plots because MAP is used as a source of P. Seeds are treated with Zn in treatments 3-6. Soil available P (Olsen) and exchangeable K are measured in addition to routine soil tests for P and K (1% (NH₄)₂CO₃). Nutrient removal in both maize and soybean is studied in this project.