河北省固安县农民中专实验林场北方果树优良品种科技示范园这块“沙土地”，仅有７０００平方米，１９９６年靠卖接穗和果子就收入７万多元，凡来考察的人无一不说：“这真是一块‘金土地’”！要问我们靠什么使“沙土地”变成“金土地”的，很简单，就是四个字：优良品种... Gu’an County, Hebei Province Farmers Experimental Middle School Farmers North excellent varieties of fruit trees Science and Technology Demonstration Garden this “sandy land”, only 7,000 square meters, in 1996 by selling scion and fruit on the income of more than 70,000 yuan, where no one to visit Do not say: “This is really a ’golden land’”! To ask what we rely on to make “sandy land” into “golden land” is very simple, that is, four words: fine varieties ...