EVALUATION OF THE CAPACITANCE TECHNIQUE AS A METHOD FOR DYNAMICALLY MEASURING SOIL-WATER CONTENT

被引：45
|
作者：
WHALLEY, WR
DEAN, TJ
IZZARD, P
机构：
[1] DIDCOT INSTRUMENT CO LTD,ABINGDON OX14 3LD,OXON,ENGLAND
[2] INST HYDROL,WALLINGFORD OX10 8BB,OXON,ENGLAND
来源：
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH | 1992年 / 52卷 / 02期
关键词：
D O I：
10.1016/0021-8634(92)80056-X
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
A capacitative sensor that can be used to measure soil water content from a moving tractor is described. The sensor was shaped similar to a narrow tine consisting of two capacitor electrodes separated by an insulator. The capacitor formed part of an oscillator with a frequency of around 150 MHz, which reduced with increasing soil water content. The sensor was found to give calibrations that were affected to a certain extent by soil bulk density. © 1992 Silsoe Research Institute.
引用
收藏
页码：147 / 155
页数：9
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