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多年来的气象资料表明我地存在着周期性的大冻年。如何利用大冻的间隙年份争取柑桔幼树早果丰产,是摆在园艺工作者面前的一项重大课题。为此,我们在1979年定植
The meteorological data over the years show that there is a periodic freeze in my years. How to make use of the gap of frozen season for the early yield of citrus saplings is an important issue before the gardening workers. To this end, we planted in 1979