The thread started on "Light Aircraft" and "Landing on Grass", which I assume was not necessarily just farm strips.
I fly a spamcam, and thoroughly enjoy it (although if I had the money, I'd definitely move up the GA snob hieirarchy without question
)
During my PPL I was well-trained on both tarmac and grass (perhaps because I told the Instructors I planned to use both, but they all thought it was a good idea and had no problems with it).
I use grass strips often, and have the following 3 golden rules:
1. Always, always phone ahead and get the PPR (irrespective of whether it's a farm strip or any other). If the owner is happy for you to land, don't be afraid to ask as many questions as possible to get an understanding of the area, of obstacles, conditions and so on. Above all, get permission. Often, the owner will want to know your experience and is the best judge of his/her strip, so might suggest you get more experience before landing there.
2. Always, always do the POH calculations and take notice of what they tell you.
3. Every single strip is different. This is the biggest point of all IMHO. Long grass, short grass, dry, wet, flat, bumpy, hard, spongy, rutted, fences, pylons, trees, dips, slopes, sheep, birds, walkers, stones, farm buildings; you name it, each one has a different combination of these.
One of the most challenging (for me) was Westbury-sub-Mendip (now closed) which was neither grass nor tarmac; but this has been discussed in another thread.
Don't let the anti-spamcan brigade put you off; but do follow the rules and believe what the calcs tell you.
On the brakes discussion, in my experience, it doesn't make any difference when the grass is wet; they don't work anyway!
Don't avoid landing on grass, because you miss out on too many wonderful locations. Get an Instructor to give you a couple of sessions and get someone with experience to go with you the first few times to build up some confidence and you'll be fine.