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CHAPTER II. How Drainage operates-How it affects Soils, 60
CHAPTER III. Drainage removes Stagnant Waters from the
CHAPTER
Surface, -
IV. Drainage removes Surplus Water from under
the Surface,
CHAPTER V. Drainage lengthens the Working Season,
VI. Drainage deepens the Soil,
CHAPTER VII. Drainage warms the Undersoil,
72
98
CHAPTER VIII. Drainage equalizes the Temperature of the
Soil during the Season of Growth, -
-
133
IX. Drainage carries down Soluble Substances to
the Roots of Plants,
- 134
X. Drainage prevents "Heaving out," "Freezing
out," or "Winter killing,"
· 144
165
CHAPTER XII. Drainage improves the Quantity and Quality
of the Crops,
CHAPTER XIII. Drainage increases the Effects of Manures,
XIV. Drainage prevents Rust in Wheat, and Rot
CHAPTER XVIII. On the Absorbing Qualities of Soil, and Ana-
lysis of Drain Water,
. 187
CHAPTER X. Draining Tools, Instruments, etc.,
CHAPTER XI. Digging Underdrains,
CHAPTER XII. Time to cut Drains and lay Tile,
CHAPTER XIII. Obstructions in Drains,
- 381
387
- 394
410
414
Conclusion,
421
APPENDIX-Laws of Ohio relating to Drainage, -
- 425
Index,
- 433