Topics: Ask the Agronomist
In alfalfa plant analysis, what are the critical nutrient concentration and the critical nutrient range of cobalt?
Posted on August 16, 2012Larry Murphy, Ph.D.
Relatively little is known about critical needs for cobalt (Co) in alfalfa. Cobalt is required for nodulation of legumes and thus the nitrogen fixation process by Rhizobia bacteria. The critical level seems to be in the range of 300-500 nanogram/g of dry weight or 300-500 parts-per-billion (ppb).
I would like to treat my pits with MTM before we get busy pumping. The problem is gallons of manure per acre have not been determined yet and we do not test manure till fall. Is there a standard ounce per gal, or just the 18 oz. per acre? If I treat all the pits in August, will I need a booster of MTM before pumping?
Posted on July 19, 2012Larry Sanders, Ph.D.
Determine the maximum amount of manure you will be applying per acre. Treat your pit today at the rate of 18 ounces per acre based on that amount. When you test your manure in the fall and figure out the actual rate of manure in the pit, you can add in the additional MTM required before agitating and pumping.
For example: Your pit holds 300,000 gallons when completely full and you… Read Full Answer
Do the high temperatures we are experiencing impact the effectiveness of NutriSphere-N’s ability to help protect urea and UAN from volatilization?
Posted on July 16, 2012Dale Leikam, Ph.D.
The warm soil temperatures of this spring and summer will not adversely affect the effectiveness of NutriSphere-N. In fact, the potential for volatilization loss from urea containing products is greatest for unincorporated surface N applications under warm, moist, drying soil conditions. Under warm conditions like we have been experiencing, research has shown that NutriSphere-N slows… Read Full Answer
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