Soil Chemical Properties under Various Land-Use Types in the Karst Area with a Case Study in Shibing County of China

Table 3

Gray correlation coefficients and correlation degrees of soil nutrient contents under different land-use types.

Land-use type	TN	AN	TP	AP	TK	AK	SOC	Gray relational degree
Upper paddy field	0.6672	0.5117	0.9425	0.5409	0.9608	0.6511	0.9657	0.7486
Lower paddy field	0.4614	0.4959	0.9066	0.5028	0.9594	0.6837	0.4244	0.6335
Upper dryland	0.4879	0.5085	0.9258	0.7878	0.9425	0.7970	0.3333	0.6832
Lower dryland	0.4803	0.5067	0.9068	0.6578	0.9390	0.7618	0.3917	0.6634
Forest	0.8372	0.6751	0.9088	0.5902	0.9280	0.7573	1.0000	0.8138
Grass slope	0.6968	0.6782	1.0000	0.5349	0.9339	0.7292	0.9764	0.7928
Dolomite shrubland	1.0000	1.0000	0.8706	0.5159	0.9456	1.0000	0.9836	0.9022
Limestone shrubland	0.5975	0.5336	0.9172	0.5574	1.0000	0.7127	0.9588	0.7539
Upper flue-cured tobacco field	0.4835	0.4879	0.9350	0.5738	0.9632	0.7315	0.3612	0.6480
Lower flue-cured tobacco field	0.4574	0.4899	0.9171	0.7199	0.9651	0.6477	0.5756	0.6818
Upper pear orchard	0.4960	0.5191	0.9508	1.0000	0.9680	0.6895	0.9198	0.7919
Lower pear orchard	0.4845	0.5036	0.9184	0.5605	0.9631	0.6444	0.9142	0.7127