Drainage-Subirrigation System Evaluation for Georgia Flatwoods

摘要

The study of drainage-subirrigation was conducted on the SEA-MAR farm located in Pierce County, Georgia on Pelham loamy sand soil. The study area included 40 hectares of land under a drainage-subirrigation system of which 38 hectares were in blueberries, 1 hectare in corn and the remaining hectare in soybeans. The system installation included two different drain spacings of 15.3 and 20 m for comparison purposes. Two types of water table management systems were used. They were an open ditch and a closed system network. Seventeen punch-tape water level recorders were used to measure the water level in the soil profile at midfield. Experimental results showed that using inappropriate design criteria or mismanagement can lead to poor performance of the system.