THE EFFECT OF ORGANIC MATTER APPLICATIONS ON THE SATURATED HYDRAULIC CONDUCTIVITY AND AVAILABLE WATER-HOLDING CAPACITY OF SANDY SOILS
Abstract
Soils are natural resources that require preservation and good
management due to their ever-changing structure. Among the soil
management applications, organic material amendments are known to be the
most practical soil management methods in the improvement of the
chemical and physical properties of soils. Organic matter amendments are
used to preserve water in coarse-textured soils and arid region soils.
This study was carried out at Bingol University Research laboratory
located in eastern Turkey. In the study, different doses of soil organic
matter (SOM) including walnut sawdust (WS), earthworm manure (EM) and
farmyard manure (FM) were applied to sandy soils to measure their
effects on the saturated hydraulic conductivity (Ksat) and available
water-holding capacity (AWC) of the soils. Compared with the control
application, the SOM amendments decreased the hydraulic conductivity of
the sandy soils (p < 0.01). A comparison with the control application
showed that the 8\% WS application reduced the hydraulic conductivity of
the soils by 51\%, followed by the FM application with 35\% and EM
application with 39\%. On the other hand, the SOM amendments increased
the available water holding capacity of the soils when compared with the
control application (p < 0.01). The application with the most notable
effect was determined to be the 1\% WS application.
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