The selection of good varieties must first consider the maturity of the variety, and secondly, consider the specificity and use of the variety. In general, the northern area should be based on the length of the frost-free period, to select the longer maturation period of the main varieties, the main requirements of the species have a longer dormancy, better storage, strong resistance and good The fertility. The potato growing period in the second cropping area of ​​Central Plains and the winter cropping area of ​​southern China is relatively short, and it is generally dominated by early-maturing and fresh-food varieties.
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