New York Agricultural Experiment Station. 



61 



what the same tendencies as basic slag, owing to their containing 

 basic compounds. Ground limestone or marl should not be mixed 

 with soluble phosphate; but at any rate they have no place in a 

 fertilizer mixture. They can better be applied alone since they 

 must be used in relatively large quantities. 



A smooth floor, a shovel and a suitable pair of scales are about all 

 the machinery necessary for home mixing of fertilizers. If a grind- 

 ing machine is available it is sometimes possible to make use of 

 cheaper fertilizing materials, such as coarse bone and tankage or 

 lumpy materials. But it is always practicable to obtain materials 

 in good mechanical condition for immediate mixing. 



A list of the most common fertilizing materials used for home mix- 

 ing, together with the approximate percentages of nitrogen, phos- 

 phorus and potassium which they contain are given below. These 

 materials, especially the organic products, vary in composition and 

 are always purchased on guaranteed analysis. 



Acid phosphate 



Bonemeal (raw) 



Bonemeal (steamed) . . 



Dissolved bone 



Dissolved bone-black. 



Basic slag 



Tankage 



Tankage 



Dried blood 



Cottonseed meal 



Nitrate of soda 



Ammonium sulphate. . 

 Muriate of potassium . 

 Sulphate of potassium . 

 Kainit 



N. 



Per ct. 



4 

 10 

 12 



8 

 15 

 20 



Per ct. 



6.5 



10 



11 



6 



6 



7.5 

 5.5 

 2 

 1 



P.Os 



Per ct. 

 15 

 23 

 25 

 14 

 14 

 17 

 12 

 4.5 

 2.5 



K. 



Per ct 



42 

 40 

 10 



= K 2 0. 



Per ct. 



50 

 48 

 12 



Some or all of these materials may be obtained from any of the 

 large fertilizer concerns either directly or through their agents. 

 The names of all fertilizer companies operating in this State are to 

 be found in the annual fertilizer inspection bulletin put out by this 

 Station. 



Natural rock phosphate, finely ground, containing 11-14 per ct. 

 phosphorus (27-32 per ct. P2O5) can be obtained in car lots direct 

 from southern mines through the companies named on the next 

 page. Prices on car lots delivered to New York points range from 

 $7.50 to $10 per ton. 



