1. Nitrification;Alexander,1965
2. Nitrogen availability indexes;Bremner,1965
3. A comparison of microbial activity in an Ontario forest soil under pine, hemlock and maple cover;Chase;Canadian Journal of Microbiology,1954
4. Soil changes associated with loblolly pine succession on abandoned agricultural land of the Piedmont Plateau;Coile;Duke University School of Forestry Bulletin No. 5,1940
5. Mineralization of organic nitrogen in soil;Harmson,1955