Wood ash is one example.

草木灰就是一个例子。

Wood ash should be forked or dug into the soil.

木灰应被耙入或插进土壤里.

Wood ash and poplar - root soil was better supplementary cultural materials.

以北芪渣为辅料的栽培料效果最佳,菌丝生长快,菌核形成多,其次是杨树根土和草木灰栽培料.

Wood ash is one example . But chemical mordents mordants such as allen alum are popular today.

但是现在化学媒染剂也很流行,就例如明矾.