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Little River, TX | I have found that I can remove more nitrogen form this soil than my records indicate should be available.
From what I have seen nitrogen is ether an estimate based on organic matter, or nitrates that are too mobile to depend upon.
Another possibility is the nitrogen (Crude Protein) reported in my hay samples may not be truly representative of the soil. The hay yield is more variable than I believe. There really is about 50 lbs of nitrogen applied annually to the soil with the rains.
I have seen well to excessively fertilized grass hay, with anhydrous ammonia, go for up to 7 years with no detectable loss of yield with no nitrogen fertilizers applied. The usual is for the yield to fall off in the fourth year. In theory mare nitrogen was removed than applied.
I do not pay for a soil test that will reflect Nitrate, Nitrite and Ammonia, I simply keep track of the amounts applied and the amounts removed in hay. The difference is residual.
This is a clay soil not a sandy soil. For sandy soil everything is different. | |
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Soil Sampling - Grid vs. Zone?
