{"title":"在西开普格拉博地区的一套土壤中，底土颜色和湿润程度之间的关系2。预测水饱和度的持续时间和评价颜色定义层的颜色定义","authors":"C. V. van Huyssteen, F. Ellis, J. Lambrechts","doi":"10.1080/02571862.1997.10635100","DOIUrl":null,"url":null,"abstract":"Existing colour indices were evaluated to determine their correlation with duration of water saturation, for a hydrosequence in the Grabouw district, Western Cape. Correlation coefficients ranged between 0.31 and 0.63. More simple colour indices were developed. Dry soil colour is a relatively good indicator (r = 0.77) of duration of free water. For this study the equation: Duration of free water = 2.35 x Huedry + 5.79 x Valuedry − 7.31 Chromadry – 27.89 can be used to predict duration of free water in diagnostic red apedal B, yellow-brown apedal B, yellow E and grey E horizons. It seems that the present colour definitions for diagnostic horizons in the South African soil classification system are sufficiently accurate to distinguish meaningfully between these horizons with respect to duration of free water.","PeriodicalId":22913,"journal":{"name":"The South African Journal of Plant and Soil","volume":"14 1","pages":"154-157"},"PeriodicalIF":0.0000,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":"{\"title\":\"The relationship between subsoil colour and degree of wetness in a suite of soils in the Grabouw district, Western Cape II. Predicting duration of water saturation and evaluation of colour definitions for colour-defined horizons\",\"authors\":\"C. V. van Huyssteen, F. Ellis, J. Lambrechts\",\"doi\":\"10.1080/02571862.1997.10635100\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Existing colour indices were evaluated to determine their correlation with duration of water saturation, for a hydrosequence in the Grabouw district, Western Cape. Correlation coefficients ranged between 0.31 and 0.63. More simple colour indices were developed. Dry soil colour is a relatively good indicator (r = 0.77) of duration of free water. For this study the equation: Duration of free water = 2.35 x Huedry + 5.79 x Valuedry − 7.31 Chromadry – 27.89 can be used to predict duration of free water in diagnostic red apedal B, yellow-brown apedal B, yellow E and grey E horizons. It seems that the present colour definitions for diagnostic horizons in the South African soil classification system are sufficiently accurate to distinguish meaningfully between these horizons with respect to duration of free water.\",\"PeriodicalId\":22913,\"journal\":{\"name\":\"The South African Journal of Plant and Soil\",\"volume\":\"14 1\",\"pages\":\"154-157\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"13\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The South African Journal of Plant and Soil\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/02571862.1997.10635100\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The South African Journal of Plant and Soil","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/02571862.1997.10635100","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
摘要
现有的颜色指数进行了评估，以确定其与水饱和度持续时间的相关性，在格拉博地区，西开普。相关系数在0.31 ~ 0.63之间。更简单的颜色指数被开发出来。干土颜色是自由水分持续时间较好的指标(r = 0.77)。在本研究中，方程:游离水持续时间= 2.35 x Huedry + 5.79 x Valuedry−7.31 Chromadry - 27.89可用于预测诊断红色花瓣B、黄褐色花瓣B、黄色E和灰色E层的游离水持续时间。目前南非土壤分类系统中诊断层的颜色定义似乎足够准确，足以在自由水的持续时间方面对这些层进行有意义的区分。
The relationship between subsoil colour and degree of wetness in a suite of soils in the Grabouw district, Western Cape II. Predicting duration of water saturation and evaluation of colour definitions for colour-defined horizons
Existing colour indices were evaluated to determine their correlation with duration of water saturation, for a hydrosequence in the Grabouw district, Western Cape. Correlation coefficients ranged between 0.31 and 0.63. More simple colour indices were developed. Dry soil colour is a relatively good indicator (r = 0.77) of duration of free water. For this study the equation: Duration of free water = 2.35 x Huedry + 5.79 x Valuedry − 7.31 Chromadry – 27.89 can be used to predict duration of free water in diagnostic red apedal B, yellow-brown apedal B, yellow E and grey E horizons. It seems that the present colour definitions for diagnostic horizons in the South African soil classification system are sufficiently accurate to distinguish meaningfully between these horizons with respect to duration of free water.
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