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Little River, TX | All my crop land is bottom land with 25 feet to gravel or a sand stone rock. It has visible lime particles as deep as you want to go.
When I pull the next series of soil samples I will use the MidWest S 2 that includes sodium and free lime.
On the upland soils here they are a few inches to 10 feet of soil, sometimes a A and B strata and then caliche rock. Where there has been erosion the soil is white not black and the caliche is very close to the surface.
I am not sure what my percentage of free lime is, yet. Using the equation for computed CEC but with Ca as the unknown I have computed as high as 30% free lime. I would think that the computed Ca level would have additative errors from all the variability potential with K, Mg, & Na. My guess would be in the 15% free lime range. If my 71 lbs of phosphate will effect the Olsen soil test 1 ppm P then it would be in the 8% to 10% range. I will have a better feel for my free lime percentage in June. | |
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Corn on high ph soil?????????
