购买菜籽“四注意”目前，正是购买菜籽的季节、选购时应注意以下四点，以防止上当受骗。一、注意“三证”的有无：选购菜籽要到持有准繁证、检疫证、经销证（营业执照）的单位或部门购买，不要随意购买无证商贩及种源不清的菜籽。二、注意品种适应性：购买菜籽时，首先要... Buy rapeseed “four attention” At present, it is the season to buy rapeseed, purchase should pay attention to the following four points to prevent being deceived. First, pay attention to the “three cards”: whether to purchase rapeseed to hold prospective, quarantine certificates, marketing licenses (business license) units or departments to buy, do not arbitrarily purchase undocumented traders and provenance Rapeseed. Second, pay attention to the variety of adaptability: When buying rapeseed, we must first ...