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Fertilizer Formula Question?
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<blockquote data-quote="john250" data-source="post: 320548" data-attributes="member: 4406"><p>Start with the per acre P requirement.</p><p>80 lb actual =173 lb 18-46-0</p><p>You get that by multiplying 80 by the inverse of 46 or 2.17</p><p></p><p>Now the N. In one application you only want 50 lb. </p><p>You have 31 lb of actual N in your 18-46-0. </p><p>Multiply 18*173 lb of 18-46-0.</p><p></p><p>To get to 50 you want to add urea. (46-0-0).</p><p></p><p>You need 19 lb N. Add in 41 lb of urea. 19*2.17=41.23 lb of urea.</p><p> </p><p>To get 40 lb of potash, add 67 lb of 0-0-60.</p><p>40*1.67=66.67.</p><p></p><p>Now you have per acre amounts for product.</p><p>173 lb of 18-46-0</p><p>41 lb urea</p><p>67 lb 0-0-60</p><p>281 lb. is where you set the spreader gate. </p><p></p><p>Throw all that in a blender and apply 281 lb/acre.</p></blockquote><p></p>
[QUOTE="john250, post: 320548, member: 4406"] Start with the per acre P requirement. 80 lb actual =173 lb 18-46-0 You get that by multiplying 80 by the inverse of 46 or 2.17 Now the N. In one application you only want 50 lb. You have 31 lb of actual N in your 18-46-0. Multiply 18*173 lb of 18-46-0. To get to 50 you want to add urea. (46-0-0). You need 19 lb N. Add in 41 lb of urea. 19*2.17=41.23 lb of urea. To get 40 lb of potash, add 67 lb of 0-0-60. 40*1.67=66.67. Now you have per acre amounts for product. 173 lb of 18-46-0 41 lb urea 67 lb 0-0-60 281 lb. is where you set the spreader gate. Throw all that in a blender and apply 281 lb/acre. [/QUOTE]
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