Mob Grazing Calculator

Mob Grazing is a grazing method where high stocking rates are used to trample down overgrown vegetation to open the canopy allowing regrowth of desirable forage. Forage utilization can be as low as 20% for brushy or, mature vegetation, but can be higher for quality forage. When high stock densities are used, paddocks must be rotated frequently to provide enough quality forage to sustain the grazing animals. This calculator estimates the paddock size and herd size needed to achieve specific stock densities. It also estimates the rotation frequency needed to provide adequate forage availability to sustain the herd.

Input

Desired stock density (lbs liveweight per acre)

lbs

Average cow weight

lbs

Number of head in the herd to be grazed

animals

Forage canopy height

inches

Estimated forage density

lbs/acre per inch

Percent forage utilization desired

Forage dry matter intake as % bodyweight

Result

Number of animals per acre to achieve this stock density

Number of acres (paddock size) needed for this size herd to achieve the specified stock density.

Number of paddock rotations per day needed to provide adequate forage intake

Number of hours grazing in each paddock to provide adequate forage intake

This application was developed by the University of Arkansas Division of Agriculture Cooperative Extension Service (CES) to assist public users. This application uses data derived from other sources and does not guarantee the accuracy of that data. Sale of this application or use of it for purposes other than its intended use is strictly prohibited. Information put forth by this application is intended to be used in conjunction with close consultation with the appropriate Extension professional. The CES is not liable for damages resulting from recommendations made by this application and is not a substitute for prudent judgment. Information and calculated values provided through this application may not consider all possible details available for a given situation and should only be used as a guide. CES does not warrant or guarantee the performance of this application nor the service offered. User’s utilize this information at their own risk.