Commercial Fertilizers for Various Crops 299 



Acid phosphate ^°Xl\ . ^. ''^ '''^'- 



Nitrate of Soda iso I ir- ,^. \ N»t«^8en 3.5 



Muriate of Potash V.' .' ! ! ! ! ! ! ! ! ! ! 300 1 Yielding Potash 8 , 



Cotton-seed Meal 700 / ' ^^**^- ^^°*- ^ci^-- .6.0 



The stations found that a higher quality of potatoes 

 could be made by the following, in which high-grade 

 sulphate of potash is used instead of the muriate: 



Pounds Per Cent. 



High Grade Sulphate of Potash . .325 \ 



Nitrate of Soda 100 



Sulphate of Ammonia too 



Dissolved Bone-black 750 



Cotton-seed Meal 725 



I Nitrogen 4.0 

 Potash 8.0 

 Avail. Phos. Acid.. . 7.0 



Or for equally good quality of tubers the following: 



Pounds Per Cent. 



Cotton-seed Meal 800 \ . \i-4.^^„.^ 



H. G. Sulphate of Potash 400 ( v;«m;«„ I pA^o.?. ^ ' "* 



Nitrate of Soda 100 Yielding Jotash . . 10 . a 



Acid Phosphate 700 ) < ^^»'^- Ph°»- A<='^- • 5 • » 



Which we consider an improvement. In all fertihzers for 

 the potato crop especially on the light soil that is best for 

 that crop the main needs are for phosphoric acid and 

 potash, when a clover sod has been plowed for the potato 

 crop. In that case the nitrogen may be omitted except a 

 little readily available nitrate of soda to give the crop an 

 early start. But in no case would we make the percentage 

 of potash lower than lo per cent, of the whole. Gardeners 

 will find this last formula well suited to all vegetable 

 crops. 



But as we have more than once urged, with our grain 

 crops, if a good short rotation of crops is used and clover 

 or other legume comes in frequently on the land the only 

 artificial fertilizers we would use are phosphates and 

 potash. 



