VI TABLE OF CONTENTS 



PACK 



Nature of Products formed in Soil at Ordinary Temperatures. 44 



Effect of Changing Ratio of Liquid to Soil 46 



Influence of Aeration 47 



Influence of Electrolytes 48 



Nature of Effective Soil Constituents 48 



Effect of Zeolites 49 



Effect of Carbon 50 



Experiments with Natural Colloids 51 



Experiment with Sterilized Soil 56 



Conclusions 57 



CHAPTER VI. RETENTION OF Cyanamid Nitrogen in Soil.. 60 



CHAPTER VII. Nitrification of Cyanamid Nitrogen 62 



CHAPTER VIII. Toxicity of FertiTvIzers 65 



Meaning of '* Poison " 65 



Conclusions of Dr. Paul Wagner 66 



Other Explanations of Toxic Action 73 



Dicyandiamide 74 



Formation 75 



Decomposition 75 



Conversion in Soil 77 



Pure Substances and Toxicity 80 



Conclusion 82 



CHAPTER IX. AGRICUI.TURAI. Use of Cyanamid 83 



Fertilizer Tests 83 



Use as a Weed Destroyer - . . 86 



Directions for Application as Fertilizer 87 



Use of Complete Fertilizer Mixtures 89 



CHAPTER X. Making Fertii^izer Mixtures With Cyanamid 90 



Mixtures with Ammonium Salts 90 



Mixtures with Acid Phosphate 91 



Other Mixtures 93 



Advantages of Cyanamid in Fertilizer Mixtures 93 



Drying Action 93 



Preventing Loss of Nitric Nitrogen 93 



Preventing Bag-rotting 94 



CHAPTER XL Permanganate Avaii^ability of Cyanamid.. 95 



Solubility on Filter 95 



Solubility in Plasks 96 



Rate of Solution in Flasks 96 



Neutral Permanganate Method 96 



Alkaline Permanganate Method 97 



Modified Alkaline Permanganate Method 98 



CHAPTER XII. Fire and Water Hazard of Cyanamid 102 



Test for Flammable Gases 102 



Spontaneous Heating Tests 102 



Test with Water 103 



Acid Tests T03 



Behavior of Product when Heated 104 



Test with the Oil Used 104 



General Behavior when Treated with Water 105 



