Drainage Irrigation 8 Surveying 4 Groundwater flow 3 Soil and water conservation 3 Building sites 2 Earthwork 2 Irrigation systems 2 SCIENCE / Environmental Science 2 Soil Water Management (Irrigation and Drainage), (Revised June 2002) 2 Soil conservation 2 TECHNOLOGY & ENGINEERING / Civil / Soil & Rock 2 TECHNOLOGY & ENGINEERING / Environmental / Water Supply 2 Water management 2 Water table 2 Watershed management 2 Zone of aeration 2 Agricultural 1 Agricultural Economics 1 Agro climate 1 Average annual rainfall 1 Clearing, drainage, revegetation 1 Climate factors in Indian agriculture 1 Cultivation and harvesting 1 Drainage systems 1 Earth work 1 Economics 1 Evaluation 1 Geology 1 Geomorphology 1