CONTENTS 



PAGE 



General Information i 



Soils Laboratory Desk Outfit 3 



Stock Soils 5 



-^ Determination of Hygroscopic Moisture ... 10 



-^Determination of Moisture in Field Soils . . . 12 



>: Determination of the Specific Gravity of Soils . 18 



-k Determination of Volume Weight and Pore Space 22 



Determination of Pore Space in Field Soils . . 26 



-i-Percolation of Water Through Soils .... 32 



-I- Water-holding Capacity of Soils 38 



The Distribution of Capillary Water in Soil 



Columns 40 



f Flow of Air Through Soils 42 



Flow of Air Through Field Soils 44 



-j" Capillary Rise of Moisture 46" 



4- Interruption of the Capillary Rise of Moisture . 46- 



Continuous Rise of Capillary Moisture . . . 50 - 



Lateral Movement of Capillary Moisture . . . 54  



Co-efficient of Evaporation ....... ^(^ 



->r Effect of Mulches upon Rate of Evaporation . 60 



The Absorptive Power of Soils 64 



.^The Flocculating Effect of Lime 6^ 



Vll 



