Carrying or Grazing Capacity

Are you managing a new-to-you pasture and you need to determine how to stock it? Perhaps it has been recently purchased or rented, or you simply don’t trust the information provided on historical stocking rates.

The first principle of pasture management is to balance the available forage supply with livestock demand. Carrying capacity (also known as grazing capacity) is the amount of forage available for grazing animals in a specific pasture or field. A substantial amount of Canada’s rangeland is in some form of public ownership (e.g. grazing leases, forest grazing allotments) and has carrying capacity data available. With privately owned or recently acquired land however, there may not be any information on historical forage production and carrying capacity.

Carrying Capacity is defined as the average number of livestock and/or wildlife that may be sustained on a pasture that fits the management goals. Site characteristics, such as soil, water, plant, and topography of the pasture, can impact carrying capacity. Forage production and availability for grazing can also affect carrying capacity. Source: Society for Range Management, 1998.

Carrying capacity can be calculated using a variety of techniques. All of them depend more or less on trial and error as they are monitored and adjusted over time as the carrying capacity for an individual year varies from the long-term average for the pasture. The effectiveness of each method depends on the kind of grazing land, but a combination of methods is generally required. Continue reading

Exceptional Forages for Marginal Lands

This article written by Dr. Reynold Bergen, BCRC Science Director, originally appeared in the April 2019 issue of Canadian Cattlemen magazine and is reprinted on the BCRC Blog with permission of the publisher.


Side Oats Gramma photo courtesy of Agriculture Agri-Food Canada

Tame forages often outperform native species in head-to-head comparisons under optimal growing conditions. This may not be the case on “marginal land,” with its tougher environments, poorer soil, rougher topography, harsher climates, and precipitation extremes. Beef production is expected to rely more and more on marginal land, at least while returns from cash crops exceed those from cow-calf production.

Beef Cluster research led by Mike Schellenberg (Agriculture and Agri-Food Canada Swift Current), Eric Lamb (University of Saskatchewan) and a team of graduate students has been examining Western Canadian native plants since 2009. Some results from this study were published in 2018 (“Mixtures of native perennial forage species produce higher yields than monocultures in a long-term study”; Canadian Journal of Plant Science 98:633-647).

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