(Mishnah): One may apply fertilizer and hoe cucumbers and gourds until Rosh Hashana. And the same applies to a Beis HaShelachin (a field that relies solely on irrigation). One may perform the following actions until Rosh Hashana (and the Gemara will explain each term) - Mezablin, Mibalin, Mefarkin, Meavkin, Meashnin.

(R. Shimon): In Shevi'is, one may even remove a leaf that is blocking a cluster's sunlight; and on Erev Shevi'is until Rosh Hashana, one may do Sikul (remove stones from the field), Kirsum (prune), Zirud (remove branches that are making it overly dense) and Pisul (remove the refuse from the tree).

(R. Yehoshua): Just as in the 5th year, one may remove branches and refuse, so too in the 6th year.

(R. Shimon): As long as I may tend to the tree, I may remove its refuse.

(Gemara) Question: The Mishnah taught that one may fertilize and hoe cucumbers. But may one plow there?

When you may plow, you may fertilize and hoe. but when you are not permitted to plow, you are not permitted to fertilize or hoe.

(R. Yosa): We can learn this from our Mishnah itself - One may apply fertilizer and hoe cucumbers and gourds until Rosh Hashana; and the same applies to a Beis Shelachin.

Baraisa: One may plow a Beis HaShelachin until Rosh Hashana. Rebbi says until 3 days before it, so that it can be sown and take root, or a sapling planted and it take root.

Question: Can a tree take root in 3 days?

Answer: Rather, Rebbi ruled that they may be planted until 3 months before Rosh Hashana. Rice is usually first planted densely and then later uprooted and planted again scattered around to take root again, which takes 3 months.

The Mishnah taught that one may fertilize, 'Mivalin' - one may remove warts from a tree; 'Mefarkin' - one may remove the dirt from leaves; 'Meavkin' - one may make dust against the creatures that damage; 'Meashnin' - one may fumigate under the vine.

Baraisa: When a sapling is bent, it can be straightened.

(Chevraya): If a vine has a high trunk, it can be lowered using pointed canes.

(R. Yosi): One may put a stone on (its foliage to prevent it growing too tall).

Baraisa: 'If the vines or canes are too dense, one may thin them out'. This was also taught in another Baraisa.

In a place where these are done before Succos, they must be done before the Succos of Shevi'is; if they are done after Succos, they may be done after Succos of Shevi'is.

(R. Shimon): When he cuts the branch, he may only cut it from the first 'knot' and above.

(R. Yirmiyah citing R. Hoshiya): He may also take its refuse (unwanted leaves, roots etc. that are on the ground below it).

(R. Shimon): He may also remove leaves that are preventing its growth in Shevi'is.

Question: The opinion of R. Shimon seems to have switched - there (end of this Perek) he said that one may excessively water rice in Shevi'is, but one may not prune dry branches. But here , you may cut (i.e. prune) branches from a vine...?

Answer: Here, it is as if he's saving it from a fire i.e. he's saving it from damage.

Question: The Mishnah taught that one may remove stones until Rosh Hashana (but not in Shevi'is itself). The Mishna teaches further on that one who removes his stones (even in Shevi'is) should remove the upper ones and leave the ones that are touching the ground...?

Answer (R. Yona): There, the stones are not connected to the ground; here, they are connected to the ground and must be pulled up.

(R. Yosi): Originally we thought that in the Mishnah (see above Menachos 106-1(a) to (d)), since R. Yehoshua only mentioned Zirud and Pisul, he agrees with the Tana Kama that Kirsum is prohibited in Shevi'is. And similarly, since R. Shimon only mentioned Pisul, he agrees with the Tana Kama - so R. Yehoshua said that Kirsum is permitted until Rosh Hashana and Zirud is even permitted in Shevi'is itself. If so, there are actually only two opinions about Zirud - the Tana Kama held that it is permitted only until Rosh Hashana and R. Shimon permitted it even in Shevi'is. But since the Mishnah said (in the words of R. Shimon), "...until Rosh Hashana, one do Sikul, Kirsum, Zirud and Pisul'' - this is the opinion of the Tana Kama and R. Yehoshua disagrees and says that it's like the Zirud and Pisul of the 5th year - this shows that the opinions are as follows -

There are 3 opinions - Tana Kama says - until Rosh Hashana, one may remove stones, do Kirsum, Zirud and Pisul; R. Yehoshua says that it's like the Zirud and Pisul of the 5th year and it's even permitted during Shevi'is; R. Shimon says, "As long as I may tend to the tree, I may remove its refuse'' - meaning that even before Shevi'is these things are only permitted until Shavuos.