苍南县旱地面积11.5万亩,占粮地面积的1/4,1年只种春粮、甘薯两熟,复种指数、总产均低(仅占全县的1/10)。同时,饲用玉米全部靠外调,亦极不合理。为此,从1986年开始,进行了耕作制度改革,增种一熟玉米。4年来,在各级领导重视下,与农技干部的共同努力,取得了显著成效,面积迅速扩大,产量逐年提高,1989年发展到1万余亩,三熟平均亩产841.7公斤。其中春粮、玉米、甘薯平均亩产分别为79 Cangnan dry land area of ​​115000 mu, accounting for 1/4 of the grain area, only 1 spring spring, sweet potato two crops, multiple cropping index, total production is low (only 1/10 of the county). At the same time, fodder corn all rely on the outside, is also very unreasonable. To this end, from 1986 onwards, carried out the reform of the farming system, increasing the number of cooked corn. In the past four years, with the leadership of all levels at all levels, joint efforts with agricultural cadres have achieved remarkable results. The area has expanded rapidly and the output has been increasing year by year. In 1989, it grew to more than 10,000 mu and the average yield per mu of three generations was 841.7 kg. The average yield per mu of spring grain, corn and sweet potato was 79