I had a mistake in the numbers I gave as to the quantity of elemental Selenium I applied. My journal said it was 400g but my purchase history says 200g is what I ordered. I ordered two different times at 100g each time. The second order actually weighed around 150g so they sent too much. I had forgotten about that. So in actuality I used about 250g. I remembered this after John’s comment which made me crunch some numbers and they seemed higher than what I thought they should be. I then checked my order history and saw what I ordered and remembered they sent me a little to much. I must have made a mistake when I wrote 400g in my journal. 250 g is about a half pound. If that was used on one acre it’s about .25ppm but I’m only about a tenth of an acre which would equal 2.5ppm. I rolled it in 8″, not 6″ which is what we use for pounds per acre and ppm. That would dilute it about 33% making it 1.675ppm plus what ever was in the soil naturally. Based on my study I believed this stuff would convert to an available form slowly which seems to be the case. I read about seleniferous (sp?) soils and saw the amount I was adding was no where near those levels so I concluded it was safe to use at this quantity. I was also using the recommended levels that Graeme Sait suggests. I’m not giving recommendations on what people should do or quantities just explaining what I did. I don’t know if anyone knows the exact details on many of these trace elements but I sought to find the best information I could at the time and made a decision. In this case it seems to me that it worked out well. Others may disagree but hopefully we’re all here to study and learn.