Summarizes findings of six-volume, comprehensive field study done in Pakistan which addresses farmers' responses to selected irrigation constraints on their crop production systems. Contains major findings and policy implications related to the irrigation system, agronomic factors, and farmers' perceived constraints regarding economics, knowledge of agricultural practices, water codes and regulations, and farmer organization. Using the survey data, possible criteria (physical, economic and social) are described which must be considered in the selection of watercourse commands for comprehensive improvement of water management. Also discussed are the implications of subsequent projects, survey and/or implement improvement programs as they relate to delivery and application efficiencies. Each major finding is referenced to a more detailed discussion in the companion volumes of the report. A glossary of English (including local English) and Urdu/Pujab terms is included.