Fertilizers Their Source Purchase And Use Written for the Use of Farmers And
Fertilizers Their Source Purchase And Use Written for the Use of Farmers And
Carroll Bradford Smith
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54% or 90. 80 pounds at 20c '. $18. 16 Phosphoric acid (from raw bone) 13% or 260 pounds at 2c 5. 20 Equal to bone phosphate, 31% . Potash, (actual, K 2 O) 4% or 80 pounds at 6c 4. 80 Sulphate of potash, 7. 95%. Total value of ton $28. 16 Although Analysis II is higher in its percentage of plant food, the form of the phosphoric acid is against it and cheapens it so much that the total value of the ton is considerably less. Either of these analyses might be offered to the FERTILIZERS 37 grower f...or, say, $35 per ton and No. 1 would be the best buy for the grower, and No. 2 the best sale for the agent or manufacturer. It is quite possible for the nitrogen to be in cheap form also and worth considerably less than 20c. Per pound. The nitrogen from raw bone is worth less than that from blood, or guano, or tankage. So the value of a ton of fertilizer is based upon the source or form of the nitrogen, phosphoric acid and potash, and the quantity of each. COST OF NITROGEN. 56. Nitrate of soda, 96% pure, 16% nitrogen at $50 per ton.
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