榆林市榆阳区是被国家和陕西省确定的杂交制种生产基地。越来越多的省内、外种子生产经营单位或个人前来寻求发展，所生产种子远销东北、华北、西北地区及安徽等省。据统计，２００２年全区杂交玉米、西瓜、高粱制种面积达５３００hm２以上，高产组合６６７m２产量超过６００kg Yuyang District, Yulin City, is identified by the state and Shaanxi Province hybrid seed production base. More and more domestic and foreign seed production and management units or individuals come to seek development. The seeds produced are exported to the northeast, north, northwest and Anhui provinces. According to statistics, in 2002 the region hybrid corn, watermelon, sorghum seed production area of ​​more than 5300hm2, 667m2 high-yield combination of more than 600kg