Great info guys. I actually help with hay right now and it's pretty brutal, but I never knew how you "seeded" for hay. So are you saying you just broadcast seed & fertilizer on the exisiting ground with a 3 point cone spreader and it grows, or must you till the ground somehow to plant the seed?
I'm more concerned with the baler breaking down. When I help, it's just being stacked or put up. I never get to help cut it.
Most folks just cut and bale "whatever is growing".....be it grass, weeds, or whatever. To get a select, clean, pure crop, you would need to start from scratch. (re-seeded)
I grow alfalfa/orchardgrass mix. I started over by round-up burndown, plow, fertilize, disc, seed, fertilize more, and pray. That SHOULD hold for 5 to 7 years before needing to re-do. (baring severe drought, disease, ect) If Alfalfa is already present, you can't direct seed more alfalfa into the same field immediately. Alfalfa put off a toxin that prevents it's own seed from germinating. Gotta skip a year. For a moderate production of hay, you might not need to go to such extremes. And yes, if you continually take hay off a field, you'll need to replentish nutrients....FERTILIZER..... I fertilize after first cutting and again after the last cutting each year.
MOst state universities with an AG dept will offer "short courses" in forage production. Well worth the time and effort. I've got a 2-year soil sciences degree from Univ. of Ky. Along with that was an intensive course in forage production. They taught me things that 20 years (at that time) on the farm never did. One of the key issues they drilled into our minds was "conditions change constantly". What you learn now is applicable to the future, but not a hard and fast rule. Be flexable and be prepared to change your game plan as the clock ticks. My 1992 degree isn't "worthless" by any stretch, but the science of growing hay has evolved since. Then again, the BASICS haven't changed significantly in my lifetime.
Good advice on the ag extention folks too. County agents can give you accurate, localized info that our broad, generalized opinions just can't compete with. Call 'em! That's what they're there for.