Apparent Electrical Conductivity to Delineate Management Zones in an Agricultural Soil with Reduced Variability in Physico-chemical Properties

Authors

  • Javier Coitiño-López Departamento de Producción Vegetal, Estación Experimental Mario A. Cassinoni, Facultad de Agronomía, Universidad de la República. Ruta 3 km 363, Paysandú 60000, Uruguay
  • Mónica Barbazán Departamento de Suelos y Aguas, Facultad de Agronomía, Universidad de la República. Garzón 780, Montevideo 12900, Uruguay
  • Oswaldo Ernst Departamento de Producción Vegetal, Estación Experimental Mario A. Cassinoni, Facultad de Agronomía, Universidad de la República. Ruta 3 km 363, Paysandú 60000, Uruguay

DOI:

https://doi.org/10.31285/AGRO.19.326

Keywords:

productivity zones, Veris sensor, topographical attributes, edaphic attributes

Abstract

The spatial variation in soils and crops could be included into agricultural management systems to optimize the use of resources within fields. This requires a spatial characterization of agroecological resources. Apparent soil electrical conduc-tivity (ECa) has been proposed as a reliable way to characterize the variation in soil properties. In this study the objectives were: i) quantify ECa relationships with terrain attributes and soil physical and chemical properties, and ii) determine if ECa can be used to delineate zones with differences in edaphic and topographic properties in an agricultural soil of Uruguay. A grid soil sampling was conducted in an area of 4.2 ha in a field. Exchangeable bases, organic matter, available phosphorus, texture, penetration resistance, direct electrical conductivity of the soil, soil depth, ECa at two depths, and terrain attributes were determined. The management zones were delineated using a fuzzy c means clustering analysis with the ECa data at two depths. The ECa showed medium to low correlations (P value ≤ 0.05) with various soil physical and chemical properties and terrain attributes. Three zones were identified according ECa, two of which had similar characteristics and differed from the third to present more exchangeable potassium, calcium, magnesium and soil organic matter and lower exchangeable sodium. Under the conditions of the study ECa proved be useful for identifying zones with different soil properties, and potentiality to be incorporated into precision farming schemes.

Downloads

Download data is not yet available.

Published

2015-06-01

How to Cite

1.
Coitiño-López J, Barbazán M, Ernst O. Apparent Electrical Conductivity to Delineate Management Zones in an Agricultural Soil with Reduced Variability in Physico-chemical Properties. Agrocienc Urug [Internet]. 2015 Jun. 1 [cited 2024 Mar. 4];19(1):102-11. Available from: https://agrocienciauruguay.uy/index.php/agrociencia/article/view/326

Issue

Section

Soil and Water
QR Code

Altmetric

Article metrics
Abstract views
Galley vies
PDF Views
HTML views
Other views

Most read articles by the same author(s)

1 2 > >>