Abstract
Ca and Mg in soil are essential nutrient elements for plants, and their exchangeable state is mainly effective. This paper studied the characteristic of statistics, distribution and exchangeable Ca/Mg for Chinese herbs plantation base soil of Yunnan Baiyao Group Co.LTD. The results of 214 soil samplings data show that 93.55% soil samplings of exchangeable Ca content were above 800 mg/kg, so the Baiyao base soil was rich in Ca element. 79.44% of the samples were seriously potential Mg deficiency. The moderate exchangeable Ca/Mg (between 5 and 10) accounts for 41.1%. Baiyao base soil with higher exchangeable Ca and Mg mainly distributed in southwest and north parts, and exchangeable Mg content in the southeast corner was also higher.
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