CONTENTS. 
Page. 
Introduction 5 
Ammonification under varying conditions 6 
Series I — Ammonification in silica sand 6 
Series II — Ammonification in soil 8 
Series III — Ammonification of equal amounts of nitrogen 9 
Series IV — Ammonification in soil under anaerobic conditions 10 
Series V — Ammonification with equal amounts of nitrogenous and non- 
nitrogenous materials 11 
Series VI — Ammonification with varying amounts of casein 12 
Series VII — Ammonification of casein during different lengths of time 13 
Series VIII — Ammonification of casein in silica sand 14 
Series IX — Ammonification and hydrolysis of casein 15 
Effects of bacterial action on different groups of nitrogen compounds 17 
Casein 18 
Dried blood 18 
Soy bean cake meal 19 
Cottonseed meal 20 
Linseed meal 20 
Coconut meal 21 
Globulin from cottonseed meal 21 
Zein from maize 22 
Summary 24 
ILLUSTRATION 
Page. 
Figure 1. Diagram showing the ammonification of different amounts of casein. 13 
(4) 
