Tag Archives: grazers

Grazing Management Primer – Part 3

Pond fenced with poly wire electric fence
Alan Newport
You can save a lot of money on water development by taking cattle to existing water sources with temporary electric fence.

Here’s a primer for managed grazing, Part III

A few more thoughts on grass regrowth, animal production and timing.

Alan Newport | Dec 08, 2017

In the first two stories of this series we covered some terms used in managed grazing, provided their definitions, and explained why the terminology and the ideas they represent matter.

In this third and final article of our managed grazing primer, we’ll cover some important concepts that aren’t based in terminology.

Plants: Taller and deeper is better

Early in the days of managed grazing there was a huge and largely mistaken emphasis on grazing plants in Phase II, or vegetative state.

Pushed to its logical end, this resulted in what then grazing consultant Burt Smith once commented about New Zealanders: “They’re so afraid of Phase III growth they never let their plants get out of Phase I.”

Young forage is high in nitrogen/protein and low in energy, while older forage is higher in energy and better balanced in a ratio of nitrogen/protein, although it has higher indigestible content.

This older attitude foiled the greatest advantages of managed grazing. It never let the plants work with soil life to build soil. It never let the grazier build much forage reserve for winter or for drought.

Last but not least, we were told for years the quality of taller, older forages was so poor that cattle could not perform on it. That is not necessarily true of properly managed, multi-species pasture where soil health is on an increasing plane and cattle are harvesting forage for themselves. It’s all in the management.

Balance animal needs with grass management

One of the most important concepts to managing livestock well on forage is to recognize livestock production and nutritional needs and graze accordingly.

If you have dry cows or are dry wintering cattle, you might ask them to eat more of the plants.

Remember the highest quality in mature, fully recovered forage is near the top of the plants and the outer parts of newer or longer leaves

Again depending on livestock class and forage conditions, an affordable and well-designed supplement program can let you graze more severely, also.

Erratic grazing breeds success

Nature is chaotic and constantly changing, so your grazing management needs to be also.

If you graze the same areas the same way and same time each year, you will develop plants you may not want because they will try to fill the voids you are creating and you may hurt plants you desire because they will become grazed down and weakened, perhaps at critical times.

If you move those grazing times and even change animal densities and perhaps also add other grazing species, you will create more diverse plant life and soil life.

Remember, too, that your livestock don’t need to eat everything in the pasture to do a good job grazing.

Cattle legs are for walking

Water is always a limiting factor for managed graziers, but the low-cost solution in many cases is to make cattle walk back to water.

Certainly you can eat up thousands of dollars of profit by installing excessive water systems and numerous permanent water points.

This can be overcome to some degree with temporary fencing back to water and using existing water sources.

Read Part I or Part II.

Grazing Management Primer – Part 2

by Alan Newport , author and blogger,  Beef Producer magazine

Large herd grazing in Texas native pasture
Alan Newport
Adaptively managed grazing with multiple paddocks is the fastest way to improve soil health and increase carrying capacity of the land.

Here’s a primer for managed grazing, Part II

More learning about what’s in the names about grazing management.

Alan Newport | Dec 07, 2017

In part I of this grazing primer we covered some names and principles for managed grazing, as well as stocking rate and stock density. Today we’ll continue along those lines with more terms and definitions.

Recovery time – This is the amount of time allowed by the grazing manager for plants to regrow after a grazing event. It is sometimes erroneously called “rest,” but this term doesn’t remind the grazing manager that plants actually need time to regrow adequate leaf material for photosynthesis and fully recharge the energy stored in crowns, rebuild root systems, and reconnect with underground life such as bacterial and mycorrhizal fungi. This is even more important than once understood, since plants trade carbohydrates with underground life for nutrients they may not be able to mine from the soil with their own root systems. Allowing plants to fully recover builds soil life and fertility, thereby increasing productivity. The most productive pasture plants also require the longest recovery time to thrive.

Graze period – This is vital information for grazing managers because the true definition of overgrazing, from the standpoint of plants, is being grazed or bitten off a second time or more before it can recover from the first grazing. This means grazing several times over several days is very damaging to individual plants, although repeated biting over a day or a few hours is not problematic.

Graze period also is inversely related to the number of paddocks used in a grazing operation. The higher the number of paddocks, the shorter the graze period.

AUDs, ADAs or cow days per acre – These are primarily measurements of the productivity of your resource. These measurements are a good way to track progress or regression over time, and is very important to help with grazing planning and management. This is very important to good managers who should be changing grazing patterns and herd makeup from year to year and season to season.

Animal Unit Days is based on an Animal Unit (AU), which the NRCS generally says is one mature cow of about 1,000 pounds and a calf as old as six months, or their equivalent. NRCS uses 30 pounds of air-dry forage per day as the standard forage demand for that animal unit. Animal Days per Acre is generally simpler in that the manager can choose his size of animal and simply track how many days and the number of animals were in a paddock. Cow days per acre is a variation of ADAs, based on a manager’s particular cow size.

As an example how to use this, a herd of 100 dry cows weighing 1,400 pounds (140 AU equivalent) might stay in a one-acre paddock one day, producing 140 ADAs for that grazing. Two of the same grazings would produce 280 ADAs for the year. This tells the manager if rainfall and time of recovery and time of year are similar, that paddock should allow a herd of 233 600-pound steers should be able to graze one day on the same paddock (140ADA / .6 = 233).

This comparison can be weight-adjusted most simply, or more accurately adjusted by the consumption of a class of livestock and forage type. It should also be adjusted to include calves with cows according to their average weight.

Residual forage — This is the forage left behind, usually expressed as a percentage of the forage present when cattle entered the paddock. Many managers aim to leave 50% under many circumstances. If forage is ample and animal production is more desired, leaving behind a higher percentage, such as 60-75% might be the goal, leaving a residual of 25-40%. If rationing out winter forage along with protein supplement, a consumption level of perhaps 80% with only 20% residual might be the goal.

Tomorrow we’ll publish Part III.