Identifying the plough pan position on cultivated soils by measurements of electrical resistivity and penetration resistance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00312697" target="_blank" >RIV/68407700:21110/17:00312697 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0167198717301356" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0167198717301356</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.still.2017.07.008" target="_blank" >10.1016/j.still.2017.07.008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Identifying the plough pan position on cultivated soils by measurements of electrical resistivity and penetration resistance

Popis výsledku v původním jazyce

Long term tillage has led to soil profile degradation in many cultivated fields. The topsoil is disturbed by plowing. The movement of fine particles from the topsoil to the subsoil and direct pressure from agricultural machinery create an abrupt delineation in the form of a plough pan with very low permeability. The plough pan prevents water infiltrating deeper into the soil profile and reduces the water supply to the lower layers. The plough pan also has a negative effect on the root growth of the crop, leading to a reduced yield. In this paper we discuss the feasibility of using electrical resistivity tomography and penetrometry to identify the presence and the position of plough pans, and also their spatial uniformity, on two fields with different tillage depths. Electrical resistivity measurements were subjected to a comparison with soil physical characteristics, such as soil water content, porosity and bulk density. Standard statistical and geostatistical methods were used. Electrical resistivity tomography seems to be an attractive method that offers a faster and more efficient method than standard invasive soil sampling for obtaining continuous information about the plough pan. It has been shown that the position of a compacted layer within the soil profile can be identified reasonably well by combining electrical resistivity data and penetration resistance data. The semivariogram showed higher variation by orders of magnitude in the topsoil than in the subsoil. This suggests macroscopic homogeneity of the compacted layer formatted in the subsoil in two differently tilled fields. We conclude that a short span between the electrodes should be used (app 10 cm) in order to observe the shallow positioned plough pan clearly.

Název v anglickém jazyce

Identifying the plough pan position on cultivated soils by measurements of electrical resistivity and penetration resistance

Popis výsledku anglicky

Long term tillage has led to soil profile degradation in many cultivated fields. The topsoil is disturbed by plowing. The movement of fine particles from the topsoil to the subsoil and direct pressure from agricultural machinery create an abrupt delineation in the form of a plough pan with very low permeability. The plough pan prevents water infiltrating deeper into the soil profile and reduces the water supply to the lower layers. The plough pan also has a negative effect on the root growth of the crop, leading to a reduced yield. In this paper we discuss the feasibility of using electrical resistivity tomography and penetrometry to identify the presence and the position of plough pans, and also their spatial uniformity, on two fields with different tillage depths. Electrical resistivity measurements were subjected to a comparison with soil physical characteristics, such as soil water content, porosity and bulk density. Standard statistical and geostatistical methods were used. Electrical resistivity tomography seems to be an attractive method that offers a faster and more efficient method than standard invasive soil sampling for obtaining continuous information about the plough pan. It has been shown that the position of a compacted layer within the soil profile can be identified reasonably well by combining electrical resistivity data and penetration resistance data. The semivariogram showed higher variation by orders of magnitude in the topsoil than in the subsoil. This suggests macroscopic homogeneity of the compacted layer formatted in the subsoil in two differently tilled fields. We conclude that a short span between the electrodes should be used (app 10 cm) in order to observe the shallow positioned plough pan clearly.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40104 - Soil science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Soil & Tillage Research

ISSN

0167-1987

e-ISSN

1879-3444

Svazek periodika

174

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

231-240

Kód UT WoS článku

000412265800024

EID výsledku v databázi Scopus

2-s2.0-85027881738