1. Soil temperature;Bouyoucos;Michigan Agric. Exp. Sta. Tech. Bull.,1916
2. Some effects of temperature on the growth and chemical composition of certain pasture grasses;Brown;Missouri Agric. Exp. Sta. Res. Bull.,1939
3. Lysimeter investigations. IV. Water movement, soil temperatures, and root activity under apple trees;Collison;New York Agric. Exp. Sta. Tech. Bull.,1935
4. The root development of New Zealand browntop, chewing's fescue and fine leaved sheep's fescue under putting green conditions;Evans;Jour. Board Greenkeeping Res. (Great Britain),1939
5. The activity of apple and filbert roots especially during the winter months;Harris;Proc. Amer. Soc. Hort. Sci.,1926