286 CROP FEEDING AND CROP GROWING 



The grower who used the above formula became convinced that it con- 

 tained too little nitrogen for his soil, and he used, then, the following: 



Pounds. 



Nitrate of soda 150 ^ 



Sulphate of ammonia 100 / 



Dried blood 450 V yielding 



Muriate of potash 400 ( 



Acid phosphate 900 J 



Per cent. 



Nitrogen 4.6 



Potash 10.0 



Available phosphoric acid 5.8 



Another Rhode Island grower uses the following: 



Pounds. 



Per cent. 



H. G. sulphate of potash ..... 360 



Acid phosphate ....... . 550 



Tankaee 730 



Fine ground bone ............ 120 



Nitrate of soda ............... 120 



Dried blood . . .120 



r Nitrogen .................... 3.9 



yielding] Potash .............. . 8.6 



l Available phosphoric acid .... 6.0 



Another grower made various changes in the formulas he used from 

 year to year, and the following represents the ideal which he finally reached. 

 He uses only the highest grades of materials : 



Pounds. 



Fine ground bone 400 



Dissolved bone black 400 



Dry ground fish 300 | 



Cotton seed meal 300 j- yielding -j 



Nitrate of soda 200 



Sulphate of potash . .' 200 



Muriate of potash , 200 J 



Per cent. 



Nitrogen 4.0 



Potash 10.0 



Available phosphoric acid 6.4 



Very excellent results are claimed for this formula for potatoes and 

 . egetables in rotation with cereals and grasses. He mixes but 500 pounds at 

 each mixing, and instead of weighing out each time the amount of the 

 materials to be mixed, he uses boxes gauged to hold approximately the right 

 weights. 



Another grower has used the following with good results : 



Pounds. 

 Dissolved bone black ......... 750 



Tankage ..................... 760 



H. G. sulphate of potash ..... 430 



Sulphate of ammonia ........ 140 



Nitrate of soda . 100 



yielding 



Per cent. 



Nitrogen ........ . ............ 4.5 



Potash . ........ : . . 10.3 



Available phosphoric acid ---- 6.7 



