Charter 5 Soil Water
Charter 5 Soil Water
Section 1 The types of soil water and measuring soil moistueeeaoi
Section 1 The types of soil water and measuring soil moisture content
The importance of soil water Effect on soil formation,erosion, and structure stability It is the ma jor constituent of plant protoplasm It is essential for photosynthesis and conversion of starches to sugar It is the solvent in which nutrients move into and through plant parts
The importance of soil water： • Effect on soil formation,erosion, and structure stability • It is the major constituent of plant protoplasm. • It is essential for photosynthesis and conversion of starches to sugar . •It is the solvent in which nutrients move into and through plant parts
The types and available of soil moisture 1 Classification of soil water Adsorbed water Membranous water Capillary water ● Numerical Gravitational water method
一、The types and available of soil moisture 1、Classification of soil water • Adsorbed water • Membranous water • Capillary water • Gravitational water •Numerical method
(1) Soil adsorbed water held by strong electrical forces low energy little movement- held tight by soil exists as a film unavailable to plants removed from soil by drying in an oven
（1） Soil adsorbed water ： •held by strong electrical forces - low energy •little movement- held tight by soil •exists as a film •unavailable to plants •removed from soil by drying in an oven