Chapter 23

DRAINAGE 237-246 Underdrainage 237 Counting the cost 238 Where returns are largest 239 Material for the drains 239 The outlet 240 Locating main and branches 240 The laterals 241 Size of tile 241 Kind of tile 242 The grade 243 Establishing a grade 243 Cutting the trenches 244 Depth of trenches 245 Connections 245 Permanency desired 246

ILLUSTRATIONS

Alfalfa and Corn in Indiana _Frontispiece_

Facing Page

A Good Crop for a Poor Soil 4

Red Clover on Limed and Unlimed Land 20

Turning down Organic Matter with a Gang Plow 36

Red Clover on the Farm of P. S. Lewis & Son, Pt. Pleasant, W. Va. 51

Alfalfa on the Ohio State University Farm 61

Curing Alfalfa at the Pennsylvania Experiment Station 68

A Heavy Grass Sod in New York 73

Good Pasture Land in Chester County, Pa. 90

Sheep on a New York Farm 96

The Cowpea Seeded at the Last Cultivation of Corn in the Great Kanawha Valley, W. Va. 106

Texas Calves on an Ohio Farm 121

In the Fertile Miami Valley, Ohio 126

Concrete Stable Floors 131

Corn in the Ohio Valley 140

Penn's Valley, Pennsylvania 151

In the Shenandoah Valley 155

Plat Experiments 167

In the Lebanon Valley, Pennsylvania 189

On the Productive Farm of Dr. W. I. Chamberlain in Northwestern Ohio 210

Deep Tillage 222

Making an Earth Mulch in a New York Orchard 233

Drain Tile 239

The Lure of the Country 246

CROPS AND METHODS FOR SOIL IMPROVEMENT