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What to spray with?
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<blockquote data-quote="Dave" data-source="post: 172608" data-attributes="member: 498"><p>The P is elemental phosphorous. The chemical form that it most often comes in is P2O5. 22.9 pounds of P2O5 has 10 pounds of elemental phosphorous in it. The amount of P removed will vary by crop and how that plant utilizes the P. I couldn't find the number for berries in my books but I will give you some examples. The Agriculture Waste Management Field Handbook lists the nutrient uptake and removal by specific crops. Most of the grasses have about a .2% P per pound of dry matter removed. That is 4 pounds per ton. Corn is 0.28%, barley 0.32%. On a fresh harvested basis apples are 0.02% while pineapples are 0.35%. The majority, but not all, of the P used by plants is in the roots. That is why the P is not removed.</p><p>As for me saying that I am a CCA. I did that to show that I do know something about this subject. If we were debating welding I wouldn't have jumped in because I don't know a lot about welding. There is a little more to becoming a CCA than paying the dues. if you don't think so go take the test and let me know how you did. And I do in fact work much more with organic nutrients and organic farmers than I ever do with chemicals. Working with farmers and their soil, nutrient, plant relationship is what I do everyday. The only reason I put my dog in this fight is things were said or certainly implied that were dead wrong and not being challenged. I know I would have to see the proven research, years of research, before I would invest my time or money in this. At this time I haven't seen any. And yes I do know the researchers. I am on a first name basis with the ones in my region. </p><p></p><p>Dave</p></blockquote><p></p>
[QUOTE="Dave, post: 172608, member: 498"] The P is elemental phosphorous. The chemical form that it most often comes in is P2O5. 22.9 pounds of P2O5 has 10 pounds of elemental phosphorous in it. The amount of P removed will vary by crop and how that plant utilizes the P. I couldn't find the number for berries in my books but I will give you some examples. The Agriculture Waste Management Field Handbook lists the nutrient uptake and removal by specific crops. Most of the grasses have about a .2% P per pound of dry matter removed. That is 4 pounds per ton. Corn is 0.28%, barley 0.32%. On a fresh harvested basis apples are 0.02% while pineapples are 0.35%. The majority, but not all, of the P used by plants is in the roots. That is why the P is not removed. As for me saying that I am a CCA. I did that to show that I do know something about this subject. If we were debating welding I wouldn't have jumped in because I don't know a lot about welding. There is a little more to becoming a CCA than paying the dues. if you don't think so go take the test and let me know how you did. And I do in fact work much more with organic nutrients and organic farmers than I ever do with chemicals. Working with farmers and their soil, nutrient, plant relationship is what I do everyday. The only reason I put my dog in this fight is things were said or certainly implied that were dead wrong and not being challenged. I know I would have to see the proven research, years of research, before I would invest my time or money in this. At this time I haven't seen any. And yes I do know the researchers. I am on a first name basis with the ones in my region. Dave [/QUOTE]
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