Disadvantages (from the modern perspective) are that space is used for a whole year, some nutrients might be leached due to exposure to rainfall, and disease-producing organisms and insects may not be adequately controlled.
缺点（从现代的观点来看）是，这个空间是一整年被使用的，一些营养物质可能因暴雨而被浸出，致病的生物和昆虫可能没有得到充分的控制。