The practice showed that the forest area may account for about 30%of the total sown area, so long as the Suitable sown area and sowing time are chosen.
实践表明，只要播区、播期选择适宜，该区飞播油松成林面积可望占30%左右。
The practice showed that the forest area may account for about 30%of the total sown area, so long as the Suitable sown area and sowing time are chosen.
实践表明，只要播区、播期选择适宜，该区飞播油松成林面积可望占30%左右。
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