Forage 5 (Source)

Anectdotal account of foraging success rates:

People were telling me that they rarely, if ever, have made mutliple-item forages. Now, I had made quite a few two and three item forages in my lifetime, so I could not quite see why they weren't. So I did a bit experimenting. I took only two planets, Endor and Tatooine, just because their vegetation is so radically different. I plan to repeat this on other planets, when I have the time.

Now, I didn't give the developers enough credit. I didn't think the foraging would be that much different, just because I couldn't quite believe that the foraging system was that complex. They said it, themselves, that it was a low priority and so I underestimated them, thinking they hadn't put that much time into it before.

Boy was I wrong!

Endor and Tatooine are radically different, as far as the mutliple-item foraging is concerned.

I only did one multiple-item forage on Tatooine (for 3 items), out of 100 logged attempts.

On Endor, I did two 3-item forages, and three 2-item forages, out of 100 logged attempts.

They also differ on which item you're more likely to find.

Endor:

Maroj Melons

Wild Snaffs

Ko-Do Fruits

Sosi Hodors

Jars of Berries

Jars of Bugs

Tatooine:

Sijjo Sewi

Worm Bait

Insect Bait

Flurr-Cle Onion

Schule Nefs, Alever Tweth'peks, and Jars of Fungus were pretty common on both. Etost'ew Zanns and Jars of Grubs, weren't.

Now, this is either unique to each planet, or planet type. For instance, Lok might yield the same as Tatooine, and Yavin IV the same as Endor.

There's a good 10% chance of getting items discarded on both planets.

You also have a 20% chance of failure on both planets as a Master Ranger (which I think is a bit too much.)