ABSTRACT
Cropping Zones ..............................................................................................193 18.2.1 Soils..................................................................................................194 18.2.2 Water Requirements .........................................................................194 18.2.3 Cropping Systems ............................................................................194 18.3 Expanse and Productivity ..............................................................................196 Keywords .................................................................................................................196 References ................................................................................................................197 Exercise ....................................................................................................................197 Further Reading .......................................................................................................197 Useful Websites ........................................................................................................197
18.1 INTRODUCTION
