宜林荒地荒沙：在通辽版图上消失丁荣总土地面积５２８万亩的通辽市，自从开展三北防护林工程建设以来，林业有了长足发展，有林地面积迅速增加，１９９０年实现了平原绿化，１９９１年通过国家平原绿化达标验收。到１９９１年底，全市有林面积１１４万亩，森林覆盖率２２... Yilan wasteland wasteland: disappear in Tongliao territory Dingrong total area of ​​528 acres of land in Tongliao, since the start of the Three North Shelterbelt project, the forestry has made great progress, with the rapid growth of forest land area, in 1990 realized the plains greening In 1991 through the national plains green acceptance. By the end of 1991, the city has a forest area of ​​114 mu with a forest coverage of 22 ...