Reference for Bava Kamma 161:10
מן חדש שאינו עושה פירות ולא מן ישן שהוא עושה פירות ממקום שאינו רואה את החמה
the former deals with the pods.<span class="x" onmousemove="('comment',' Which are used as food. ');"><sup>12</sup></span> It is only to the seeds that grasses are disadvantageous as they make them lean, whereas to the pods<span class="x" onmousemove="('comment',' So that the stipulation of Joshua should have practical application where it was sown for the use of man. ');"><sup>13</sup></span> they are advantageous, for when placed between grasses they get softer. Or if you like I can say that while one statement refers to fenugrec sown for the use of man, the other refers to fenugrec sown for animals, for since it was sown for animals grasses are also required for it. How can we tell [for what it was sown]?<span class="x" onmousemove="('comment',' So that the stipulation of Joshua should have practical application where it was sown for the use of man. ');"><sup>13</sup></span> — R. Papa said: If made in beds it is sown for man, but if not in beds it is for animals. 'That shoots be permitted to be cut off [by all] in all places, with the exception, however, of stumps of olive trees.' R. Tanhum and R. Barias explained in the name of a certain old man that in the case of an olive tree the size of the length of an egg has to be left over at the bottom; in the case of reeds and vines [it is only] from the knot and upwards<span class="x" onmousemove="('comment',' Cf. B.B. 80b. ');"><sup>14</sup></span> [that it is permitted to cut off shoots]; in the case of all other trees [it is permitted only] from the thick parts of the tree but not from the central part of the tree, and only from a new bough that has not yet yielded fruit but not from an old bough which is yielding fruit; again, only from such spots [on the tree] as do not face the sun