Tag Archives: cool season grasses

First Stab at Mob Grazing (UHDG)

About a week ago, despite our poor pasture growing situation due to dry and hot weather, i tried what others have done and that is UHDG or ultra high stock density grazing.  There are some who have successfully managed shifting cows 5,7,9 times a day and obtaining up to 1 million pounds of livestock per acre!  That can result in a phenomenal improvement in soil quality due to deep rooted plants and evenly distributed manure.

My experience was far different and after a couple of hours quickly realised my misgivings as to mob grazing’s effectiveness in our area.

  1. Cool season grasses often don’t have deep roots, by and large, unless allowed to grow quite tall (and mature) which results in unpalatable grazing.
  2. Mature grasses are unpalatable and very low ‘octane’ (nutrition)
  3. Laying down cool season, fine stem grasses by trampling is virtually impossible.
  4. Toxic endophyte fescue is poisonous at all stages; recent research shows the bottom 2 inches is as toxic as the seed heads.  Forcing cattle to consume it is detrimental to their health.
  5. Hot, humid weather causes some animals to suffer and they need shade – not all small paddocks can have shade.
  6. I quickly realized that i was exhausting myself setting up polybraid and posts to shift the cattle.  To the point that, instead of accomplishing other tasks whilst at the farm, i felt like napping instead!!
  7. A problem perhaps unique to my situation is the distance from the stock.   My farm is 35 minutes’ drive (via JD Gator) from our home.  Though  my solution was to shift cattle often on the days i could go up there, then give them a large break to last up to 3 days, but i found point 6 overwhelmed even that idea.

 

IMG-4041
This photo shows my mob at an estimated 50,000 lbs per acre.  Not even close to what is needed to see positive effects of mob grazing.  Nevertheless, i have discovered an optimal balance of dividing my 20 acre paddocks (paddock sizes vary) in half results in acceptable utilization plus gives an extra day and a half of grazing over giving access to the entire paddock.  This is very important; instead of 3 days grazing, there are 4.5 days, which over the course of 24 paddocks results in an additional 36 days rest period!

Putting dollars to that extra growth:  In normal and decent growing conditions (not over 90F and normal rainfall), cool season grasses and legumes could potential produce 8-12 inches of growth in 36 days.  An average pasture with little to no bare ground (spaces between plants) might yield 300 lbs to the inch per acre.  So, if the entire farm received that additional 36 day rest, then 400 acres x 300 lbs per inch x 8 inches growth  = 960,000 additional lbs produced.  Reduce that by 20% to get a hay equivalency and price it at 5 cents per pound, then 768,000 lbs x .05 = $38,400 worth of hay that is not needed to purchase and maintain or grow the herd.  OR, consider that as my wages for setting up and taking down posts and polybraid during the summer.  Of course, nothing is perfect or normal, so even these conservative figures may fall way short in the face of a drought or hot temperatures.  Nevertheless, there is gain to be considered IF the labor does not become cumbersome and cost more than the value of forage.

Well, this was all written on Monday the 21st of May – a week later – still no rain and temps continue well into the 90s with heat indices above 100 for several hours each day and little to no wind.  It’s muggy and hot; cool season pastures are no longer growing, so the planned grazing is relaxed already since the cows need shade and i’ve set up a paddock with a big timber patch.  Guess where most of the manure (nutrients) will end up?  Yeah, not where planned.  As usual, theories, plans, scenarios all go out the window in the face of nature.  Like any other year, we just do the best we can with the conditions we are given.

Cheers!

tauna