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Moisture Temporal Stability of a Typic Hapludox under Different Uses and Depths
Author(s) -
Guimarães Claudinei Martins,
Costa Carlos Alexandre Gomes,
Filho Raimundo Rodrigues Gomes,
Santos Silva Francisco Charles,
Assunção Hildeu Ferreira,
Carneiro Leandro Flávio,
Pedrotti Alceu,
Doll Kenneth Michael
Publication year - 2019
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj2018.09.0573
Subject(s) - environmental science , water content , soil science , moisture , soil water , biome , hydrology (agriculture) , geology , geography , meteorology , geotechnical engineering , ecology , biology , ecosystem
Temporal stability shows that specific within‐field locations can represent average moisture values for a period of time, reducing efforts of collecting and measurement field observations. The objective of this study was to analyze the temporal stability of soil moisture within a Hapludox, typical of Cerrado, a unique Brazilian biome (similar to savanna), located in the southwestern state of Goiás. Instant readings of volumetric soil moisture were done biweekly from November 2013to February 2014, using a portable TDRSensor with rods of 0.12 m in length, at 0‐ to 0.12‐, from 0.12‐ to 0.24‐, and 0.24‐ to 0.36‐m soil depths. The TDR sensor data were corrected and calibrated by volumetric water content data obtained from gravity method and soil bulk density measurements. To quantify temporal stability, we used nonparametric methods: Spearman correlation coefficient, average relative difference, and temporal stability index. Temporal stability on the field scale differed between the three sites/systems. Average soil moisture can be accurately estimated at only one georeferenced point for each site/management system, reducing measurement effort in long‐term studies. Core Ideas Moisture temporal stability reduce cost of field measurements. It is essential to planning monitoring programs of hydrology and irrigation. Represent a valuable support for future researches related to soil water management.