Oskaloosa, Iowa 52577 | I received the following chart.........(edited to protect the innocent) and comments........also edited................If the commas were decimal points, it would seem to work.......heh????? I need to call this fellow, and would rather not show toooooo much ignorance..........is it as simple as he used commas instead of decimal point for the ppms? N is most likely percent??? Comes close to the indicated 220lbs per A for five tons. I can get the K...........using conversion of 2. But "150lbs of P"???? I cannot get close to that. I don't know "SAR".............or the "three-fold safety factor"........ Thanks. *********************************************** XXX DIGESTED COMPOST ANALYSES BY ZZZ AND YYY | | Lab# | ID | Total N | P, ppm | K, ppm | Ca, ppm | Mg, ppm | Na, ppm | SAR | | P1885 | Old | 2.468 | 7,000 | 5,728 | 90,150 | 4,213 | 13,425 | 16.8 | | P1885 | Old | 2.497 | 6,865 | 5,218 | 91,550 | 4,215 | 14,000 | 17.3 | | P1886 | New | 2.292 | 6,185 | 5,835 | 81,225 | 4,120 | 12,975 | 17.0 | | P1886 | New | 2.264 | 6,125 | 4,790 | 83,650 | 3,800 | 12,925 | 16.8 |
............. I completed the SAR calculations using the sodium, calcium and magnesium contents from digestion, not the saturated paste extracts. With these values, the compost at five dry tons per acre would have a three-fold safety factor. A five-ton application would give 220 lbs per acre of N and about one-half to three quarters would be available in the crop year to corn and more to grass pasture. A five-ton application also yields 150 pounds of phosphate and 60 pounds of potash.
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Need some help with conversion factors..........
