1. Survey of methods for soil moisture determination;Schmugge;Water Resources Research,1980
2. Review of techniques for measuring soil moisture in situ;McKim,1980
3. Interactions of the electromagnetic spectrum with soils;Wheeler;ASAE Paper No. 84-2078,1984
4. Measurement of soil moisture and bulk density;Erbach;ASAE Paper No. 83-1553,1983
5. Water content;Gardner,1986