(Mishnah): If a person said to his friend "I am selling you a Beis Kur of earth" (which enough to plant a Kur of grains; 75000 square amos), if there were 10 tefach deep ditches or 10 tefach high rocks, they are not included in the measurements. If they were less than 10 tefachim, they are included.

If he said, "around a Beis Kur", even ditches and rocks of more than 10 tefachim are included.

(Gemara) - R. Yasa citing R. Yochanan: (When the Mishnah taught, "if they were less than 10 tefachim, they are included") - it is as long as only a minority of the field contains ditches and mounds and that they are spread out rather than all in one area. If there is one rock that fills an area of a Beis Rova (the area in which 1/4 kav of seeds can be planted; roughly 104 square amos), it is not measured with it. If the rock is in the middle of the field, it is measured; if it is at the side, it is not measured.

Question: What is considered the middle and what is the side?

Answer (D'Bei R. Yanai): Any place that the plough can encircle (without leaving the field) is considered the middle; if not, it is the side.

(R. Yosi citing R. Yochanan): (When R. Yochanan said above that they must be spread out throughout the field, he was referring to) when most of their area was on one side of the field, but if by viewing the area of the rock as spread throughout the field, it will only be a minority of the field, it should be measured with it.

Question: What is the largest area of rocks and ditches of less than 10 tefachim that can be included in a sale?

Answer #1 (R. Chagai): Until 4 amos.

Answer #2 (R. Yosi bei R. Bun): Until 10 tefachim.

Question: If there was one ditch 10 tefachim deep that was not 4 tefachim wide, is it included?

Answer (R. Yasa citing R. Yochanan): '...as long as it is a minority of the field and they are spread out.A rock that is spread out over a Beis Rova is not measured it, but if it was split in two, even if they cover an area of a Beis Rova, it is measured with it'. (This shows that the measurements given the Chachamim of 10 tefachim by 4 tefachim are both needed.)

Question (R. Chiya bar Vava): If the split was like sticks (that are not straight), is it measured with it or not?

Question #2 (R. Yudan bar Yishmael): If it was like marble boards (triangles), is it measured with it or not?

Question #3 (R. Yitzchak bar Tavlai): If it was round, does he measure if there is a Beis Rova from above or from the wider lower part?

Rav Huna quoting Rav Chiya quoting R. Yochanan: In order that it should be considered suitable for planting, it must have 4 kav amount of soil.