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News and information from UC Cooperative Extension about alfalfa and forage production.
Tractor & Hay bales
by Bill Wilson
on April 13, 2013 at 4:30 PM
Thank you Rachael,  
I am very interested in Cu - Mo - Co Plant analysis levels.  
From Alfalfa Hay samples analyzed for essential elements by Midwest Labs, Omaha, Nebraska.  
Avg Cu is 7 ppm CNO 9.6 Min CNR 7.7 a little lower than the low desired.  
Mo 0.95 ppm on the low side.  
Co 0.20 ppm I have no feel for desired level or range for cobalt.  
K 1.97% ok Critical Nutrient Concentration 1.90%  
Mg 0.24% a little low but ok  
S 0.24% a little lower than 0.26% but ok and a 7.6/1 N/S  
The soils are calcareous & a high shrink Vertisal Clay.  
What can you tell me about the cobalt?  
Every 10 to 20 years this soil needs some copper sulfate and some Moly.  
I have looked at cobalt because a Mo Co analysis is not much more expensive than Mo alone. Just need a sample three times as large so they can find some cobalt.  
Bill Wilson  
Texas Hay Grower & CAFA member
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