PPRM said:
Also.... What about waste vs cost of harvesting some of this? If I feed a cow 25 pounds of hay, it is what she will eat... If I leave it stockpiled, she will eat a lot more than that...
PPRM
My best answer would be that with planned grazing, you take as much as you need to, or leave as much as you want to. It depends on your goals for your grazing. On years where you have plentiful forage, you could let the cows only graze 25-30% of the stand, leaving the rest for litter to improve your soils, IF THAT PADDOCK NEEDS IT. If not, graze more. Or if it's a year where you need to take more for financial reasons and such, so be it. I've done both many times, depending on the year and conditions. But NEVER, EVER consider it waste. It is going into your soils as fertilizer, and a better fertilizer you cannot purchase anywhere.
As for harvesting, you have to remember that every time you harvest your haylands with equipment, you are taking all of the nutrients OFF that land. Denny mentioned his cows eating the bales right where they fell out of the baler, but in that scenario, the only nutrients going into the soil are manure and urea. The leftover hay they don't eat is not extra nutrients as it came from the soil beneath it. That is a totally different scenario than buying hay and dumping it onto the poor/marginal land and bale grazing there.
I admit grazing the bales where they fell is obviously a cost-saver, I'm just making a point that you cannot compare that to the bale-grazing mentioned earlier.
Cowzilla - in tests done at the Lacombe Research Station in Central Alberta, creeping red fescue was the best species for holding nutritive value over the winter, followed closely by meadow brome. We have lots of brome in our river hills, and the cows graze it happily enough. I have taken clippings of brome, and the rough fescue(Prairie Wool) that Per mentioned. The protein levels after a hard frost dropped from 11% protein to 7% on the Rough Fescue, and from 12.5% to 7.5% on the Brome. At 7.5% protein, we have grazed cows into December with no supplements other than a loose mineral and vitamin mix. The added vitamins are essential as the grass has none when dormant.
The cows lost no weight in this period and went onto bale-grazing paddocks in great shape, all the while,
still nursing 450lb calves. I have to also point out that these are May/June calving Galloway and Gall-cross cows, who are multiple generations of being raised on this ranch. They are "locally adapted" as Dr. Provenza would say. Cows brought in from another region and feeding system would likely lose significant amounts of weight under our system, and it's entirely possible that cows like ours could go to another region and suffer also.
If there is one underlying point to be made here from everyone's posts, it is that beef production does not hinge on 1 thing. It does not hinge on producing Kit Pharo type cows, or feeding bales on sand holes, out of the baler, shredder, TMR wagon or any other single method. It hinges on a planned management system that encompasses every resource the ranch provides and can sustain.