A guide to integrating plant, soil, and water relationships for drainage of irrigated lands.

1 INTRODUCTION
2 BASIC DATA
3 FIELD AND LABORATORY PROCEDURES
A . IN-PLACE HYDRAULIC CONDUCTIVITY TESTSBELOW A WATER TABLE
B. IN-PLACE HYDRAULIC CONDUCTIVITY TESTSABOVE A WATER TABLE
C. LABORATORY TESTS FOR HYDRAULIC CONDUCTIVITY.
D. OBSERVATION HOLES AND PIEZOMETERS
4 DRAINAGE INVESTIGATIONS
5 DESIGN AND CONSTRUCTION
A. SPACING OF DRAINS
B. INTERCEPTOR DRAINS.
C.OPENDRAINS
D. PIPE DRAINS
E. SPECIAL DRAIN TYPES
F. INVESTIGATION AND LAYOUT FOR DRAINS .
6 OPERATION AND MAINTENANCE OF DRAINAGE SYSTEMS
7 SPECIAL DRAINAGE PROBLEMS