ILLUSTRATIONS 



FIG. PAGE 



1. Soil Auger IG 



2. King Type of Soil Sampling Machine 16 



3. Bin fob Storing Soils 18 



4. Pint Tin Cans for Use in Taking Soil Samples 18 



5. Soil Sampling Tube 23 



6. Twelve-inch Tube, with Solid Bottom 23 



7. An Accurate Scale 26 



8. Drying Oven 42 



9. Moisture-proof Chamber 42 



10. Handy Equipment to Show Rise of Water by Capillarity 44 



11. Frame and Glass Tubes for Showing Capillary Rise of Water in Dif- 



ferent Soils 44 



12. Galvanized Tray or Tank 44 



13. Percolation Soil Tube 48 



14. Support Block for Use in Holding Tubes 48 



15. Another Simple Form of Apparatus to Show Percolation of Water 



THROUGH Soils 48 



16. Common Soil Tube ■ . . 53 



17. A Good Form of Cylinder for Mulch Experiments 60 



18. Preparing Himself for a Soil Plowing Contest 82 



19. Sod Plow Which Does Not Pulverize the Soil Very Much 83 



20. Stubble Plow 84 



21. General Purpose Plow 84 



