Irrigation investigations in Otago, New Zealand

Open Access
Publisher Website
Google Scholar
Abstract
A preliminary study was made of the surface and ground waters and their relation to the salty soils of the Ida Valley. The surface waters are low in salinity, but the ground water varies greatly in salinity. The degree of salinity of the ground water is associated with saline contamination from the Tertiary sediments. Soil salinity arises if the depth to ground water is on average less than 5 ft and at the same time the ground water conductivity is greater than 400 micromhos per cm. A sodium hazard can exist when the ground water conductivity exceeds 1,750 micromhos per cm, but more particularly if the water table is less than 3 ft from the ground surface. Soil salinity levels are low to medium and chemical analysis indicates that improvement of the salty soils is possible by controlled leaching without the addition of amendments.

This publication has 1 reference indexed in Scilit: