关中西部在地理上及气候上,接近一年两熟区的边缘,玉米生育期的6—9且平均降雨量为389.6毫米。干县西南及武功一带玉米为主要的夏播作物,兴平、醴县、扶风、歧山等县亦多有种植。1956年在低产改高产,增加复种的号召下,夏玉米面积扩大很多,占杂粮面积的比重由1955年的5—37.28%,提高到26.61— The geographical location and climate of the central and western Guanzhong are close to the edge of the two-cropping area a year, with an average of 389.6 millimeters of rainfall during the maize growing period of 6-9. The dry seeding crops are mainly sown in southwestern and wugong areas of dry counties. Xingping, Lixian, Fufeng and Qishan counties are also mostly planted with crops. In 1956, under the call of low yield, high output and increased multiplication, the area of ​​summer maize expanded a lot, accounting for 26.61% of the total area of ​​miscellaneous grains from 5-37.28% in 1955,