Tree species in Chinese pine, spruce, birch, Yang, Liu mainly forests are apple, pear, peach, apricot and so many kinds of wild grass, nearly 100 species.
树种以油松、云杉、白桦、杨、柳为主，经济林有苹果、梨、桃、杏等，野生牧草种类较多，近100种。
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The author started the research of Osmia from 1995 and obtained some progress on the trap technology of wild Osmia and application of Osmia pollination to the apple - pear trees.
Wild tomatoes, for instance, are very small and round, but through selective breeding we now have cultivated tomatoes that may be pear-shaped, egg-shaped, or even donut-shaped.