Study on predicition method of cone crop in seed orchard of Pinus tabulaeformis
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Abstract:
An investigation at Badu seed orchard of Pinus tabulaeformis has been made to study two cone crop prediction methods:counting number of visible cones in crown from an observation point and counting number of cones in certain information section of cro
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XIE Bin, GUO Jun rong, YANG Pei hua, WANG Ya feng, SHI Shi yuan . Study on predicition method of cone crop in seed orchard of Pinus tabulaeformis[J]. Acta Botanica Boreali-Occidentalia Sinica,1999,19(2):
