Đại cương cây khoai lang
Khoai lang( Ipomoea batatas) là loại cây lương thực được trồng từ lâu đời. tuy nhiên về nguồn gốc, người ta vẫn chưa biết rõ ràng và đưa ra hai giải thuyết..
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Gi¸o tr×nh m«n häc:
Hoa mµu
(b¾p - ®Ëu xanh - khoai lang)
phÇn: khoai lang
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