住在城市的人自己也能种蔬菜,这种方法叫做浅床栽培。美国民间组织“回声”研究出一种办法,是针对住在城市而有小片种植地的人而设计的。这种办法使用李氏禾浅床。做法是这样的:开始时用一大块塑料布做为床底,可以将塑料布直接放在地上,假如你的房顶是平的,而且是由坚固的混泥土铺成的,也可以放在房顶上。再用4块木料做一个浅箱子。箱子多长多宽均可,但是深度要达到8公分深。箱子 People living in the city can grow their own vegetables, this method is called shallow bed cultivation. One method developed by the U.S. non-governmental organization Echo is to target those who live in small cities in the cities. This method uses Lee shallow bed. The idea is this: Start with a large piece of plastic sheeting for the bed, place the plastic sheeting directly on the floor, and if your roof is flat and paved with solid concrete, On the roof. Then use four pieces of wood to make a shallow box. How long the box width can be, but the depth to reach 8 cm deep. box