宣化县贾家营镇经过三年试验，终于摸索出西瓜套种西红柿、胡萝卜三种三收栽培模式，并获得丰收。据调查：一般亩平均可获纯收人3000元，比一种一收产值收入翻了两番。其具体栽培方法是：一、西瓜3月中旬选地造墒，亩施腐熟优质农家肥8000－10000公斤，复合肥25公斤，3月下旬整 Jiahua Town, Xuanhua County after three years of testing, and finally worked out the watermelon intercropping tomatoes, carrots, three kinds of three harvest cultivation model, and access to good harvest. According to the survey, the average mu yields an average net income of 3,000 yuan, more than quadrupling the income from a kind of output. The specific cultivation methods are: First, mid-March selection of watermelon moisture, Mushi high quality farmyard 8000-10000 kilograms of fertilizer, 25 kg of compound fertilizer, the whole of March