37 



liable laboratory method to differentiate between the low and hi^di 

 grade organic animoniates in fertilizers. The experience at this 

 laboratory would indicate that the alkaline permanganate method 

 serves this purpose better than any other method yet tried both in 

 accuracy and ease of manipulation. In studying this experiment 

 the reader should not lose sight of the fact that we are dealing with 

 that part of the nitrogen only which is insoluble in water. In many 

 cases this is but a small proportion of the total nitrogen which the 

 fertilizer contains. The availability of the water soluble part of the 

 nitrogen in fertilizers is not questioned. 



To make this matter plain and to avoid an}' possibility of in- 

 justice to the manufacturer, Table No. 3 has been prepared which 

 shows the total nitrogen as well as the total nitrogen activity of each 

 fertilizer (the total nitrogen activity would include nitrogen as ni- 

 trates and animoniates, soluble organic nitrogen and water insoluble 

 organic nitrogen). In this table there have also been included the 

 percentage of water insoluble nitrogen of each fertilizer and the ac- 

 tivity of the water insoluble nitrogen, both by the chemical and vege- 

 tation tests. 



TABLE NO. 3. 



BRAND 



Armour's Special Corn 2 .73 



Baugh's Economical Truck 3.55 



Beach Lawn Dressing 4 .25 



Boston Plant Life 1 .74 



Bradley's Complete Potato & Vegetable 3.17 



Bradley's Green Mountain Special 1 .77 



Buffalo Farmer's Choice 96 



Buffalo High Grade Manure . . . v 3 .28 



Buffalo Tobacco Producer 4.71 



Buffalo 2-8-10 1 .84 



Buffalo Vegetable and Potato 2.46 



Chittenden's Tobacco and Onion 3.46 



Chittenden's Fish and Potash 2 .50 



Chittenden's Grain and Vegetable 2.99 



Chittenden's Grass and Grain 4.13 



Chittenden's Potato and Grain 3 . 69 



Chittenden's Potato Special 3.25 



Chittenden's Tobacco Special 4.79 



Coe-Mortimer Amraoniated Superphosphate 1.93 



Johnson Ideal Potato. 3.21 



Lister's Celebrated Onion 3 . 24 



Lister's 10% Potato Grower 3.32 



Lowell Corn and Grain 1 .68 



Lowell Superior 10 % Potash 3 . 69 



National Potato Phosphate 2.28 



O. & W. Corn and Potato 3.25 



O. & W. Complete Grass 3 .70 



O. & W. Complete Onion 3.70 



O. & W. Complete Tobacco 4.77 



Royster's Champion Crop Compound 1 .75 



Sanderson's Potato Manure 2.30 



^■irginia-Carolina Potato and Truck 1 .65 



^'i^ainia-Carolina Fish and Potash 1 . 80 



Wilcox Grass ' 4 . 52 



Wilcox Superphosphate I 1 .30 



Worcester Rendering Com and Grain I 2.13 



H5 



■>s 



&,z 



76.20 



85.36 



95 54 



45.98 



82.34 



86.44 



62.50 



86.59 



80.05 



82.06 



88". 61 



84.98 



84.80 



88.96 



93.70 



88.62 



88.62 



67.86 



81.35 



81.00 



86.73 



85.55 



84.52 



79 . 13 



88.16 



74.77 



77.57 



76.22 



74.63 



82.28 



73.48 



80.00 



76 . 1 1 



93.80 



81.54 



81.69 



Waler Insoluble Organic Nitrogen 



2.26 

 1.77 

 .73 

 1.76 

 2.70 

 .78 

 1.16 

 1.78 

 4.26 

 .99 

 1.04 

 2.19 

 1.26 

 1.54 

 1.50 

 2.47 

 2.35 

 4.24 

 1.45 

 2.30 

 2.44 

 2.86 

 .71 

 3.13 

 1.02 

 2.50 

 2.39 

 2.79 

 2.65 

 1.07 

 3.01 

 .98 

 .91 

 1.76 

 .78 

 I.IS 





0^3 



48.00 

 46.40 

 44.00 

 34.00 

 54.20 

 55.80 

 42.40 

 54.80 

 61.00 

 43.60 

 48.20 

 47.20 

 37.20 

 38.20 

 40.80 

 47.80 

 52.00 

 37.00 

 66.00 

 47.20 

 56.00 

 52.00 

 58.00 

 60.00 

 63.00 

 35.60 

 39.00 

 .39.00 

 50.00 

 56.00 

 62.00 

 26.00 

 24.00 

 44.00 

 41.00 

 49.00 



"^ o 2 e 



2 «35 g 

 ■ - «) i. 



'-' 0) «■-? 



ei.-s on i 



16.45 

 .34.61 

 8.51 

 No inc. 

 59.57 

 36.88 

 39.15 

 34.61 

 50.50 

 20.43 

 39.15 

 46.52 

 No inc. 

 16.45 

 31.21 

 50.50 

 55.60 

 47.09 

 69.80 

 10.78 

 52.20 

 51.06 

 54.47 

 74.89 

 68.09 

 41.42 

 57.30 

 62.41 

 53.33 

 55.04 

 70.92 

 20.99 

 2.84 

 13.62 

 3.97 

 59.57 



