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延安地区丘陵起伏,沟壑纵横,海拔800—1000公尺。粉砂圵土。气候变化很大,据延安气象站1954—1958年的记载材料,年平均温度为10℃,年平均降雨量为538.58毫米,但分布极不均匀,春季经常干旱多风,三、四月份降雨量仅占全年降雨量的9.3％,六月下旬至九月上旬降雨较为集中,占全年降雨量的5569.8％。使糜子生育期间能充分利用夏季后半
Yan’an hilly area, ravines aspect, elevation 800-1000 meters. Silty clay soil. The climate change is very big. According to the recorded materials of 1954-1958 in Yan’an Weather Station, the annual average temperature is 10 ℃ and the average annual rainfall is 538.58 mm, but the distribution is extremely uneven. The spring is often arid and windy, and the rainfall in March and April Accounting for only 9.3% of the annual rainfall. Rainfall was more concentrated from late June to early September, accounting for 5569.8% of the annual rainfall. Millet can make full use of the latter half of summer