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Green news from the UC Division of Agriculture and Natural Resources
Hills
Comments:
by Charles A Raguse
on October 3, 2015 at 9:06 AM
"RMD is a measure of the old plant material (without counting summer annuals)..."  
 
A pretty challenging task, it would seem, if the bulk of existing summer annuals consists of Medusahead.  
 
The photo chosen to illustrate an appropriate level of RMD (probably taken on "Forbes Hill" at the SFREC?) is, at least, a good example of overgrazing.
by Charles A Raguse
on October 3, 2015 at 12:17 PM
Re: "RMD is a measure of the old plant material(without counting summer annuals)that are left standing or on the ground before the fall precipitation comes..."  
A pretty challenging task, it would seem, if the bulk of existing summer annuals consisted of Medusahead, for example.  
Further: "Optimum RDM levels are site specific, range from 100-2,100 pounds per acre,..." and depend on a number of widely-ranging environmental factors and levels of their individual impacts.  
The photo presented (apparently taken on the "Forbes Hill Field" at the UC Sierra Foothill Research & Extension Center), if chosen to illustrate a suitable level of RMD for this site, is mostly an example of overgrazing.  
 
My comment then, distills to deleting "(without counting summer annuals)", simply because it can't be done on many, if not most, of California's annual rangelands.
 
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