天津市静海县杨家园大队,位于天津市南48公里,津浦路旁,地处滨海盐碱地区。这里过去是有名的盐碱荒滩,4千多亩土地有90％是盐碱地,其中土壤含盐量在1.6％以上的重盐碱地占1,700亩,是个旱、涝、碱交替危害,粮、棉、木、柴俱缺的穷地方。1965年以来,杨家园大队响应毛主席“农业学大寨”的伟大号召,十多年来,三大革命运动一起抓,结合生产,成立科研小组,大搞科学造林。实行科学治碱。他们认真地弄清盐碱地的土壤盐分 Jinghai County, Tianjin Yangjiayuan brigade, located 48 kilometers south of Tianjin, Jin Pu Road, is located in coastal saline area. It used to be famous salinization wasteland, of which, 90% of 4,000 mu of land is saline-alkali land, of which 1,700 mu is heavy saline land with salt content above 1.6%. It is a drought, waterlogging and alkaline alternation hazard. Grain, cotton, Wood, Chai are poor places. Since 1965, the Yangjiayuan Brigade has responded to the great call by Chairman Mao’s “Agriculture Studies in Dazhai.” Over the past decade and more, the three major revolutionary movements have been grasping the task of combining scientific research with production and setting up scientific research groups so as to engage in scientific afforestation. The implementation of scientific management of alkali. They carefully understand the saline soil salinity