Rashi: They are grain fields.

Radak: The entire verse is about vines. This is like "umi'Shadmos Amorah" (Devarim 32:32).

Radak based on Targum Yonasan: This refers to the commoners [of Mo'av].

Malbim: It is a place of vineyards and trees.

Rashi: It is desolate.

Rashi: Sivmah was a place of vineyards (and Cheshbon was a place of grain fields).

Rashi: It was when Sancheriv exiled Gad and Reuven. Mo'av, who were nearby, settled there.

Radak: They are kings of nations.

Malbim: In the Eli (pestle) used to crush grain of many nations.

Rashi: It is its choice vines. Radak - this is like "Netatich Sorek" (Yirmeyah 2:21). It refers to the officers.

Malbim: They cut and crushed the branches that overlapped each other.

Rashi: They went in exile. The vineyards and grain fields mentioned are a metaphor for camps in the days of these nations.

Malbim: After they cut and crushed the branches, they stretched until Yazer. The Nimshal is about the group of Giborim united together with a strong bond.

Rashi: This is like la'Midbar. Malbim - each fled by himself to the wilderness.

Rashi: Its branches [Radak - of the vine that spread out]. They are a metaphor for exiles. Radak - some of Mo'av will be killed, and some will be exiled.

Malbim: These branches are not interwoven. Rather, they are spread out.

Rashi: They were spread [Radak - until they cross the sea]. This is like "u'Netashticha ha'Midbarah" (Yechezkel 29:5).

Malbim: The Nimshal is the rest of the nation, who were not united together for war. They scattered immediately and crossed seas in order to wander to other lands.