XDA28070302 - Sub-project on Maize–Soybean Rotation Soil Ecological Function Enhancement – Local Standards

This dataset consists of two Heilongjiang provincial local standard text documents, which systematically cover the complete technical specifications for the reduction and elimination of soil obstacle layers and fertility improvement techniques in black soil region farmlands, as well as the partial substitution of chemical fertilizers with organic fertilizers and other nutrients under the maize–soybean rotation system.