SOME STATION INVESTIGATIONS IN FERTILIZERS 28? 

 Proposed formula for onions: 



Pounds. Per cent. 



Muriate of potash 400 ^ 



Acid phosphate 550 / /- Nitrogen '. 4.4 



Tankage 500 V yielding j Potash 10.0 



Fine ground bone 200 I I Available phosphoric acid 5.9 



Nitrate of soda 350 J 



"Rhode Island formula for general purposes : 



r Niti _ 

 yielding \ Potash . ..10.0 



Pounds. Per cent. 



Nitrate of soda 125 ^) 



rn __ A f Nitrogen 3.2 



Tankage 750 (^ , 7i aiHi J n ^^ 



Dissolved bone black 725 . 



Muriate of potash 400 J ' Available phosphoric acid .... 8.0 



A compost with hen manure: 



Pounds. Per cent. 



Air dry hen manure 1330 ^ t Nitrogen 2.0 



Acid phosphate 530 \ yielding \ Potash 4.5 



Muriate of potash 140 ) (. Phosphoric acid 5.1 



As we have said heretofore, we have never found any fertilizer in which 

 there is purchased nitrogen, which paid its cost on the Indian corn crop. The 

 Khode Island Station gives the following formula for corn, which is certainly 

 well compounded to suit the manurial requirements of the plant for most 

 soils. But for a soil notably deficient in potash, as much of the New 

 England soil is, we would reverse the percentages of phosphoric acid and 

 potash. 



Pounds. Per cent. 



Acidrphosphate . . ... 920 ^ 



r, of """:::::::::::::::SJ "'{ SET :::::::::::::::::::: S 



Muriate of potash 20oJ l Phosphoric acid 8.3 



The acid phosphate in the above is stated in the bulletin as dissolved 

 bone, and the following remarks are "appended. 



"Dissolved bone is frequently sold at so high a price that it would be 

 better economy to omit its use and substitute a little extra nitrate of soda 

 to supply the nitrogen ; and dissolved bone black, dissolved phosphate rock 

 or double superphosphate to furnish the phosphoric acid." This advice is 

 good, except that it would add more expense to the nitrogen, and it would 

 have been better to have stated plainly that soluble phosphoric acid is one and 

 the same thing, no matter whether it is derived from bone or rock, and if 



