1. Introduction to soil microbiology.;Alexander,1977
2. Chemical analysis of ecological materials.;Allen,1974
3. Losses of wheat straw residue under simulated field conditions.;Brown;Proc. Soil Sci Soc. Am,,1970
4. Development and application of new chemical method for predicting the digestibility and intake of herbages samples.;Clancy;10th Int. Grassld. Congr.,1966
5. The rate of decomposition of plant roots.;Doughty;Scientific Agriculture,1941