Ningxia Agroreclamation Bureau was set up in 1950. Before reclamation,48% of landis saline--alkali swamp soil, 35% slight sierozem, 13% sandy soil. In the early days of recla-mation, eight unfavorable factors exist in...Ningxia Agroreclamation Bureau was set up in 1950. Before reclamation,48% of landis saline--alkali swamp soil, 35% slight sierozem, 13% sandy soil. In the early days of recla-mation, eight unfavorable factors exist in farmlands, i. e. high underground water table (0.5--1.0m).mineralization of underground water (5--36g/l).soil salinity (0.5--10%).展开更多
文摘Ningxia Agroreclamation Bureau was set up in 1950. Before reclamation,48% of landis saline--alkali swamp soil, 35% slight sierozem, 13% sandy soil. In the early days of recla-mation, eight unfavorable factors exist in farmlands, i. e. high underground water table (0.5--1.0m).mineralization of underground water (5--36g/l).soil salinity (0.5--10%).
