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各林业研究所对适宜的造林方法问题,特别是选择最适宜的株行距问题感到很大的兴趣。德国几乎在备林研机构展开了造林株行距的研究,并把各主要树
The various forestry institutes are very interested in the appropriate afforestation methods, especially the selection of the most suitable spacing of the rows. Nearly all the research institutes in Germany started the research on the line spacing of afforestation and put the main trees