Abstract

The effect of different tillage practices on soil hydraulic properties was studied in a mature, drip irrigated apricot orchard with a 7% slope, in Murcia (SE Spain). The soil had a loamy texture. Three soil tillage treatments were applied between the rows of trees: 1) control treatment (non-tilled, although weeds were cut to ground level using a blade attached to a tractor following the common practice of the area), 2) perforation treatment, in which soil surface was mechanically perforated with an adapted plough, and 3) mini-catchment treatment, in which small banks were manually raised perpendicular to the line of emitters. The perforation and mini-catchment treatments increased the infiltration of water into the soil surface: the hydraulic conductivity and sorptivity values were higher than those of the control treatment. Both tillage treatments were designed to prevent runoff and both increased rainwater penetration of the soil. They may therefore be useful as part of water management strategies in semiarid areas with scarce water resources, such as Mediterranean countries. The process of infiltration appears to be controlled more by gravity than by capillary forces since the values for time related to gravity were small.

Highlights

  • The widespread use of tractors and agricultural machinery in intensive agriculture causes soil compaction, one of the leading causes of soil degradation threatening future productivity (Yavuzcan, 2000)

  • A major effect of soil compaction on irrigated soils is a reduction in the infiltration rate (Goldhamer and Peterson, 1984)

  • The aim of this paper was to assess the effect of different soil surface tillage practices on the hydraulic properties of a loamy soil, based on tension disk infiltrometer measurements

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Summary

Introduction

The widespread use of tractors and agricultural machinery in intensive agriculture causes soil compaction, one of the leading causes of soil degradation threatening future productivity (Yavuzcan, 2000). Additional key words: disk infiltrometers, hydraulic conductivity, infiltration, pore size, sorptivity, time related to gravity. The aim of this paper was to assess the effect of different soil surface tillage practices on the hydraulic properties of a loamy soil, based on tension disk infiltrometer measurements.

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