赤玉土Akadama soil
赤玉土應該多肉圈最聞名的顆粒土了，有句話叫：種肉不識赤玉土，說會配土也枉然。赤玉土是日本的特產，是日本北部某些地區由火山灰堆積而成，這也是在日本運用最廣泛的一種栽培介質。它是高通透性的火山泥，清新的黃色圓狀顆粒，不含有害細菌，呈微酸性，其結構有利於持水和排水。赤玉土PH值6.9，它的主要成分：二氧化矽42.7%，氧化鋁25.1%，氧化鐵8.4%，氧化鎂2.5%，氧化鈣0.98，氧化錳0.15%。
The red jade earth should the multi-meat circle most be well-known the granular soil, had a speech to call: Plants the meat not to know the red jade earth, said can match the earth also in vain however.The red jade earth is Japan's special product, is north Japan certain areas becomes by the volcanic ash stack, this also is utilizes the most widespread one kind of cultivation medium in Japan.It is the high permeability volcanic mud, the fresh yellow round shape pellet, including the harmful bacterium, does not assume the slight acidity, its structure is advantageous in holds the water and draining water.Red jade earth PH value 6.9, its principal constituent: Silicon dioxide 42.7%, aluminum oxide 25.1%, ferric oxide 8.4%, magnesia 2.5%, calcium oxide 0.98, manganese oxide 0.15%.