Abstract
As it is known, drought is one of the most important issues of recent years. On the other hand, agriculture is the sector that uses the most water. The impact of drought can be reduced by reducing the water used in agriculture. Therefore, it is very important to determine the application time and amount of irrigation water for a successful agricultural irrigation management. One of the most important ways to achieve this success is to accurately determine and monitor the water content in the plant root zone. Soil water content can be determined in two ways; direct and indirect methods. The direct measurement method is tedious, laborious and time consuming. Instead, a large number of indirect measurement methods are developed. One of these indirect measurement methods is the PR2 Profile Probe method. In this study, the possibilities of using PR2 method under different soil water content conditions were investigated. First, the calibration of the PR2 method was made within 40 cm of soil depth. Then, the water content in the soil was monitored by the PR2 method under three different soil water content (100%, 75% and 50%) conditions. R2 values for calibration relationships varied between 0.7947 and 0.9305. In the study, it was concluded that soil water content could be monitored with PR2 Profile Probe.
Highlights
The soil is a dynamic and heterogeneous system in which all living things inhabit and plants are grown
A total of 108 volumetric soil water samples and 324 times PR2 readings were used for the calibration
The methods discussed in these studies have been somewhat different from one another depending on soil characteristics and other factors
Summary
The soil is a dynamic and heterogeneous system in which all living things inhabit and plants are grown. The measurement of soil water content is necessary for irrigation engineering, land and water conservation studies, many environmental and engineering studies (Çetin, 2003). One of the most important problems in the agriculture sector in the coming years is the sustainability of irrigated agriculture. The studies on increasing the efficiency of the unit production and increasing the efficiency of the water used in the agricultural production are important issues for water saving. For this aim, determination and monitoring of soil water content in irrigation agricultural lands with effortless, fast and easy-to-use methods has become very important
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