68 The Bulletin. 



No. 12— 



Bone meal, 22.5 per cent phosphoric acid and 3.7 per cent 

 nitrogen 950 pounds 



Cotton-seed meal, 6.59 per cent nitrogen, 2.5 per cent phos- 

 phoric acid and 1.5 per cent potash 975 pounds 



Muriate of potash, 50 per cent potash 75 pounds 



2,000 pounds 



This mixture is a concentrated one, on account of the high-grade 

 phosphatic and potassic materials used, and will contain: available 

 phosphoric acid, 11.9 per cent; potash, 2.6 per cent; nitrogen, 5.0 per 

 cent (equal to ammonia, 6.0 per cent). 



No. 13— 



Acid phosphate, 14 per cent phosphoric acid 5So pounds 



Cotton seed, 3.1 per cent nitrogen, 1.3 per cent phosphoric 



acid and 1.2 per cent potash 1,375 pounds 



Kainit, 12.5 per cent potash 40 pounds 



2,000 pounds 



This mixture will contain : available phosphoric acid, 5.0 per cent ; 

 potash, 1.1 per cent; nitrogen, 2.1 per cent (equal to ammonia, 2.6 per 



cent). 



Cotton Seed. — Cotton seed may replace the meal in preceding form- 

 ulas containing meal by allowing 2 pounds of seed for one of meal. 



Nitrate of Soda. — This material is quick-acting, because of its easy 

 solubility in water. For this reason, when used in a considerable quan- 

 tity in fertilizers at time of planting, especially on light sandy land, 

 there is considerable danger of its being leached beyond the reach of 

 the roots of the plants before they can use it. On clay lands and loams 

 having good subsoils to them this danger does not exist, certainly not to 

 the extent that it does on light soils. A small amount of nitrate of 

 soda in the mixture will give the crop a quick start and make its culti- 

 vation easier and more economical. Formula ]STo. 3 has been arranged 

 with this idea in view, and in No. 2 one-half the nitrogen comes from 

 nitrate of soda. On light lands it would likely be better to omit the 

 nitrate from the mixture and apply it as a top dressing, between the 

 10th and last of June, on early corn. Nitrate of soda may take the 

 place of a portion of the other nitrogen-furnishing materials in any of 

 the formulas, one pound of nitrate being equal in its content of nitrogen 

 to 2.2 pounds of cotton-seed meal, 2 pounds of fish scrap, 1.2 pounds 

 of dried blood. Nitrate of soda is frequently used as a top dressing for 

 corn, and is a very valuable material for use in this way. A good appli- 

 cation is 50 to 75 pounds per acre, distributed along the side of the row 

 or dropped beside the plants and three or four inches from them, or 

 else, where there is a ridge in the center, it may be distributed on this, 

 and when it is thrown out the nitrate will be thrown to the two sides 

 of the row. 



Application of Fertilizers to Corn. — On clay lands and loams having 

 good subsoil the fertilizer should be applied in the drill, at or just before 

 planting, at the rate of 200 to 400 pounds per acre. On light sandy 



