A person may establish three heaps to a beis seah [in] his field; more than this, he must make a hollow; [these are] the words of R’ Shimon. But the Sages forbid [this] unless he lowers [the dumpsite] three [handbreadths into the ground] or raises [it] three [above the ground]. A person may place his dung in a stockpile. R’ Meir forbids this unless he lowers [the dumpsite] three [handbreadths into the ground] or raises [it] three [above the ground]. [If] he had a small amount, he may add to it continually. R’ Elazar ben Azaryah forbids [this] unless he lowers [the dumpsite] three [handbreadths], or raises [it] three, or unless he puts [it] on a boulder.