raw data of figure 4,,,,,,,,,,,,,,,,,,
altitude,plot,soil layer,SOC,TN,AN,TP,AP,Alt,Slp,pH,SBD,SMC,Clay,Silt,Sand,TG,EEG,eCa
1200,Ⅰ-1,topsoil,21.73231451,1.758577001,144.7922926,0.255008,1.787175,1200,25,5.22,1.07113,50.19652143,15.1,76.05,8.85,1.0449472,0.7647232,2.757568663
1200,Ⅰ-1,topsoil,22.67521191,1.682444057,149.6886503,0.22431104,1.44807,1200,25,5.35,0.92948,65.34406335,15.11,76.38,8.51,1.052272,0.761968,2.757568663
1200,Ⅰ-1,topsoil,23.0337887,1.786774387,158.7818861,0.24843008,1.347255,1200,25,5.3,1.10705,46.14787047,15.13,76.24,8.63,1.067056,0.7155328,2.757568663
1200,Ⅰ-2,topsoil,23.65756764,1.603491375,120.310504,0.20676992,0.925665,1200,35,5.6,1.0714,45.1586709,15.5,73.29,11.21,1.11208,0.7398592,3.246189621
1200,Ⅰ-2,topsoil,24.19064906,1.606311114,124.5073821,0.19142144,0.779025,1200,35,5.62,1.13627,42.03138339,15.49,73.38,11.13,1.0315744,0.741136,3.246189621
1200,Ⅰ-2,topsoil,23.30575295,1.595032159,123.1084227,0.20238464,0.705705,1200,35,5.58,1.2231,39.03523833,15.49,73.5,11.01,1.0299616,0.7215808,3.246189621
1200,Ⅰ-3,topsoil,24.37905762,1.578113728,128.7042601,0.20238464,0.93483,1200,30,4.82,0.93333,54.93126761,12.18,74.91,12.91,1.1095264,0.827152,2.252311178
1200,Ⅰ-3,topsoil,24.53819028,1.578113728,129.4037398,0.1855744,0.82485,1200,30,4.81,0.91532,49.82738277,12.19,75.26,12.55,1.1603968,0.8985856,2.252311178
1200,Ⅰ-3,topsoil,23.81155067,1.555555818,134.9995772,0.19726848,0.943995,1200,30,4.8,0.83438,64.33159951,12.26,75.59,12.15,1.188688,0.8195584,2.252311178
1300,Ⅱ-1,topsoil,20.66749359,1.079019988,95.8287154,0.11760256,0.943995,1300,18,4.53,1.32145,33.81512732,6.9,32.62,60.48,1.091584,0.8067232,0.395181836
1300,Ⅱ-1,topsoil,19.15194603,1.076200249,89.53339833,0.11833344,0.98982,1300,18,4.47,1.00455,47.72385645,6.98,33.49,59.53,1.0667872,0.7664704,0.395181836
1300,Ⅱ-1,topsoil,19.31003992,1.081839726,88.83391866,0.12052608,0.943995,1300,18,4.55,0.75231,73.04435671,6.9,32.81,60.29,1.1494432,0.747856,0.395181836
1300,Ⅱ-2,topsoil,19.45828218,1.112856851,96.52819508,0.12198784,0.943995,1300,9,4.63,0.91043,59.08636578,5.97,30.6,63.43,1.114432,0.7752064,0.435232735
1300,Ⅱ-2,topsoil,18.87256733,1.124135806,97.92715443,0.12564224,0.962325,1300,9,4.6,0.98418,57.1348737,5.92,30.19,63.89,1.1104672,0.8245312,0.435232735
1300,Ⅱ-2,topsoil,19.65704078,1.101577897,110.5177886,0.1380672,0.980655,1300,9,4.59,0.8214,67.63209155,5.98,30.65,63.37,1.1192032,0.691744,0.435232735
1300,Ⅱ-3,topsoil,21.15047478,1.186170056,95.12923573,0.17972736,1.13646,1300,32,5.18,1.026103,51.52778016,18.89,63.36,17.75,0.892336,0.6785056,2.417444112
1300,Ⅱ-3,topsoil,22.23552015,1.203088488,102.1240325,0.18192,1.00815,1300,32,5.27,0.889096667,59.95152632,18.66,62.13,19.21,0.9235168,0.645712,2.417444112
1300,Ⅱ-3,topsoil,22.15381799,1.205908227,90.23287801,0.17168768,1.145625,1300,32,5.3,0.882306667,63.08853207,18.94,63.36,17.7,0.9771424,0.6814624,2.417444112
1400,Ⅲ-1,topsoil,30.77615258,1.939040274,136.0487967,0.163648,1.163955,1400,15,4.41,0.82021,62.76441399,8.85,51.06,40.09,1.0779424,0.8409952,1.15676507
1400,Ⅲ-1,topsoil,28.85465536,1.910842888,138.1472357,0.17022592,1.20978,1400,15,4.33,1.00862,45.78632191,8.75,50.78,40.47,1.1524,0.8848096,1.15676507
1400,Ⅲ-1,topsoil,29.91507612,1.727089919,131.8519186,0.15853184,1.145625,1400,15,4.4,1.37751,32.51228666,8.83,51.15,40.02,1.1112064,0.8783584,1.15676507
1400,Ⅲ-2,topsoil,31.00804504,1.504800523,112.9659674,0.17022592,1.218945,1400,4,4.33,1.32175,31.42727445,11.29,57.94,30.77,1.1840512,0.9286912,2.369383034
1400,Ⅲ-2,topsoil,32.19802256,1.504800523,112.9659674,0.19434496,0.650715,1400,4,4.29,0.83655,57.89133943,11.36,58.61,30.03,1.1689312,1.0605376,2.369383034
1400,Ⅲ-2,topsoil,32.34171944,1.504800523,110.8675284,0.15560832,0.375765,1400,4,4.31,0.87904,59.16909356,11.35,58.27,30.38,1.1832448,1.1091904,2.369383034
1400,Ⅲ-3,topsoil,29.26661028,1.927761319,185.7118536,0.23600512,1.493895,1400,6,4.96,1.29189,33.81170223,14.91,56.22,28.87,1.0985728,0.8071264,0.935560878
1400,Ⅲ-3,topsoil,28.37163099,1.924941581,195.8543089,0.23965952,1.897155,1400,6,5,1.01264,47.96176331,14.56,54.89,30.55,1.1308288,1.0407808,0.935560878
1400,Ⅲ-3,topsoil,30.55183997,1.902383672,186.0615934,0.24623744,1.292265,1400,6,4.99,1.18459,37.87217518,14.66,55.27,30.07,1.1502496,1.1481664,0.935560878
1500,Ⅳ-1,topsoil,35.44150553,1.90520341,173.8206991,0.19995984,0.925665,1500,12,4.73,0.73996,80.11784421,6.06,34.7,59.24,1.0907104,0.803296,1.310806986
1500,Ⅳ-1,topsoil,33.38917721,1.834709944,178.7170568,0.21556536,0.797355,1500,12,4.7,0.76401,83.35362103,5.92,33.84,60.24,1.2124096,1.0118848,1.310806986
1500,Ⅳ-1,topsoil,32.47496908,1.865727069,192.0071706,0.21482224,0.80652,1500,12,4.72,0.76072,83.97570722,5.98,34.24,59.78,1.0622176,0.7647232,1.310806986
1500,Ⅳ-2,topsoil,36.33485274,1.831420249,131.8519186,0.25718008,0.95316,1500,14,4.73,0.81465,74.85934867,5.74,32.85,61.41,1.1062336,0.8926048,0.124068064
1500,Ⅳ-2,topsoil,33.42040182,1.842699204,139.5461951,0.250492,0.742365,1500,14,4.7,0.70278,85.13617348,5.76,33.05,61.19,1.0793536,0.7612288,0.124068064
1500,Ⅳ-2,topsoil,33.31426718,1.837059726,143.0435934,0.2579232,0.87984,1500,14,4.7,0.92652,64.58252385,5.81,33.38,60.81,1.0913824,0.84832,0.124068064
1500,Ⅳ-3,topsoil,43.66185429,2.47432066,166.1264227,0.34635448,0.58656,1500,7,4.77,0.67291,100.251148,8.55,40.28,51.17,1.1386912,0.729376,0.001450699
1500,Ⅳ-3,topsoil,44.50073299,2.479960137,167.525382,0.34932696,0.724035,1500,7,4.79,0.61091,104.1691902,8.58,40.37,51.05,1.1468224,0.7860928,0.001450699
1500,Ⅳ-3,topsoil,40.21378554,2.488419353,173.1212194,0.30325352,0.76986,1500,7,4.78,0.86588,64.77918418,8.27,38.96,52.77,1.1808928,0.725008,0.001450699
1600,Ⅴ-1,topsoil,8.422799382,0.720443223,69.59822761,0.08477624,0.7332,1600,0,4.75,1.24193,38.42406577,4.48,22.01,73.51,0.8370976,0.6303232,0.140088423
1600,Ⅴ-1,topsoil,10.93179964,0.720443223,66.10082924,0.09146432,0.577395,1600,0,4.76,1.0034,51.69324297,4.5,22.14,73.36,0.8588704,0.6514912,0.140088423
1600,Ⅴ-1,topsoil,10.05981273,0.700705053,68.19926826,0.08923496,0.669045,1600,0,4.64,1.50013,24.38055369,4.44,21.85,73.71,0.8674048,0.7010176,0.140088423
1600,Ⅴ-2,topsoil,15.97832381,1.095468463,82.07228181,0.13307904,0.76986,1600,0,4.73,1.36032,32.10568102,2.93,15.08,81.99,0.9919936,0.8077984,2.600445908
1600,Ⅴ-2,topsoil,16.4789219,1.137764543,86.96863953,0.13084968,0.705705,1600,0,4.77,1.30481,31.76401162,2.93,15.09,81.98,1.0448128,0.8184832,2.600445908
1600,Ⅴ-2,topsoil,17.02104618,1.084189509,83.47124115,0.12713408,0.80652,1600,0,4.76,1.30585,38.43550178,2.95,15.25,81.8,1.0067104,0.7600864,2.600445908
1600,Ⅴ-3,topsoil,10.56529396,0.816314337,57.5904932,0.1241616,1.63137,1600,8,4.71,1.28503,33.83033859,3.17,16.16,80.67,0.7756096,0.7063264,1.826847405
1600,Ⅴ-3,topsoil,10.76180172,0.81067486,56.19153385,0.13084968,1.805505,1600,8,4.69,1.20844,38.95352686,3.2,16.29,80.51,0.7850848,0.6707776,1.826847405
1600,Ⅴ-3,topsoil,11.22681029,0.813494599,57.5904932,0.12936344,1.86966,1600,8,4.7,1.28057,33.79042145,3.25,16.45,80.3,0.788512,0.6588832,1.826847405
1200,Ⅰ-1,subsoil,5.463907212,0.650419714,46.16565852,0.18849792,0.797355,1200,25,5.9,1.07113,50.19652143,15.19,76.69,8.12,0.4886735,0.3334228,1.053248902
1200,Ⅰ-1,subsoil,7.959479016,0.656059191,46.16565852,0.1928832,0.65988,1200,25,5.8,0.92948,65.34406335,15.12,76.36,8.52,0.5259598,0.3397065,1.053248902
1200,Ⅰ-1,subsoil,6.775032734,0.636321021,47.56461786,0.16949504,0.577395,1200,25,5.73,1.10705,46.14787047,15.07,76.19,8.74,0.4920369,0.3023877,1.053248902
1200,Ⅰ-2,subsoil,3.688344338,0.289493167,59.45577233,0.17168768,0.56823,1200,35,4.5,1.0714,45.1586709,15.72,74.03,10.25,0.5560285,0.3148628,0.053208782
1200,Ⅰ-2,subsoil,4.039368278,0.278214213,59.45577233,0.17680384,0.34827,1200,35,4.53,1.13627,42.03138339,15.57,73.36,11.07,0.5056333,0.3275317,0.053208782
1200,Ⅰ-2,subsoil,3.657579305,0.297952383,59.45577233,0.1855744,0.339105,1200,35,4.5,1.2231,39.03523833,15.75,73.96,10.29,0.4803321,0.2887078,0.053208782
1200,Ⅰ-3,subsoil,10.05272357,0.565827555,39.87034145,0.1563392,0.650715,1200,30,4.96,0.93333,54.93126761,16.24,74.86,8.9,0.5094472,0.3520322,0.020551896
1200,Ⅰ-3,subsoil,8.690900922,0.568647293,41.96878047,0.15707008,0.320775,1200,30,5.02,0.91532,49.82738277,16.23,74.79,8.98,0.5353285,0.4018848,0.020551896
1200,Ⅰ-3,subsoil,9.269318856,0.563007816,45.46617884,0.163648,0.69654,1200,30,4.89,0.83438,64.33159951,16.33,75.01,8.66,0.5911107,0.3524352,0.020551896
1300,Ⅱ-1,subsoil,8.086880596,0.458677486,44.76669917,0.1015232,0.31161,1300,18,4.6,1.32145,33.81512732,7.88,35.33,56.79,0.5059055,0.3268277,1.599789621
1300,Ⅱ-1,subsoil,7.41114001,0.441759054,45.46617884,0.09640704,0.320775,1300,18,4.57,1.00455,47.72385645,7.87,35.52,56.61,0.4913641,0.3227204,1.599789621
1300,Ⅱ-1,subsoil,7.006491399,0.424840622,44.76669917,0.10006144,0.45825,1300,18,4.57,0.75231,73.04435671,8.04,35.91,56.05,0.5736319,0.3151233,1.599789621
1300,Ⅱ-2,subsoil,12.05444216,0.656059191,72.04640647,0.10298496,0.375765,1300,9,4.58,0.91043,59.08636578,7.88,33.49,58.63,0.5184435,0.3370278,0.102502196
1300,Ⅱ-2,subsoil,14.11263405,0.647599975,72.27956636,0.07740416,0.49491,1300,9,4.58,0.98418,57.1348737,8.09,34.44,57.47,0.5281921,0.358719,0.102502196
1300,Ⅱ-2,subsoil,10.68688038,0.675797362,72.97904604,0.07813504,0.31161,1300,9,4.62,0.8214,67.63209155,7.78,33.21,59.01,0.5386237,0.2827318,0.102502196
1300,Ⅱ-3,subsoil,6.578540848,0.416381406,33.57502438,0.09129088,0.522405,1300,32,5.49,1.026103,51.52778016,21.56,66.6,11.84,0.4344306,0.299767,0.102502196
1300,Ⅱ-3,subsoil,6.784258509,0.441759054,35.6734634,0.09056,0.56823,1300,32,5.45,0.889096667,59.95152632,21.56,66.41,12.03,0.4503399,0.2759478,0.102502196
1300,Ⅱ-3,subsoil,7.319810931,0.438939316,39.87034145,0.12052608,0.53157,1300,32,5.48,0.882306667,63.08853207,21.54,66.58,11.88,0.4478416,0.2976098,0.102502196
1400,Ⅲ-1,subsoil,13.43223985,0.72091318,54.90915445,0.10590848,0.62322,1400,15,4.5,0.82021,62.76441399,11.09,55.67,33.24,0.509904,0.350196,0.102502196
1400,Ⅲ-1,subsoil,14.15926267,0.703994748,70.99718696,0.0978688,0.69654,1400,15,4.56,1.00862,45.78632191,11.07,55.61,33.32,0.5641471,0.3681587,0.102502196
1400,Ⅲ-1,subsoil,13.4620953,0.712453964,57.70707314,0.10371584,0.614055,1400,15,4.55,1.37751,32.51228666,11.08,55.68,33.24,0.5302841,0.3704561,0.102502196
1500,Ⅳ-1,subsoil,20.06453317,1.064921294,93.38053654,0.18286808,0.375765,1500,12,4.92,0.73996,80.11784421,7.91,33.88,58.21,0.5137724,0.362984,0.260857285
1500,Ⅳ-1,subsoil,20.13117599,1.056462079,102.4737723,0.18658368,0.412425,1500,12,4.9,0.76401,83.35362103,7.9,33.92,58.18,0.6056798,0.4527946,0.260857285
1500,Ⅳ-1,subsoil,19.58725144,1.084189509,99.67585361,0.18658368,0.29328,1500,12,4.9,0.76072,83.97570722,7.94,34.07,57.99,0.5252004,0.3278883,0.260857285
1500,Ⅳ-2,subsoil,16.41950843,0.996777611,79.39094305,0.19921672,0.485745,1500,14,4.75,0.81465,74.85934867,8.72,36.25,55.03,0.5467005,0.3606754,0.018087226
1500,Ⅳ-2,subsoil,17.00054881,0.996777611,84.17072083,0.20144608,0.43992,1500,14,4.77,0.70278,85.13617348,8.57,35.73,55.7,0.4951202,0.316904,0.018087226
1500,Ⅳ-2,subsoil,16.7982508,1.010876304,82.77176148,0.20144608,0.45825,1500,14,4.76,0.92652,64.58252385,8.59,35.81,55.6,0.5257758,0.3714414,0.018087226
1500,Ⅳ-3,subsoil,14.17157581,1.070090815,78.69146338,0.19698736,0.71487,1500,7,4.88,0.67291,100.251148,11.04,42.31,46.65,0.558842,0.3204968,0.020551896
1500,Ⅳ-3,subsoil,14.03172884,1.064451338,83.5878211,0.18212496,0.45825,1500,7,4.88,0.61091,104.1691902,11.14,42.61,46.25,0.5336247,0.3379999,0.020551896
1500,Ⅳ-3,subsoil,16.39400564,1.044713168,93.38053654,0.17766624,0.504075,1500,7,4.91,0.86588,64.77918418,10.89,41.81,47.3,0.5387837,0.318901,0.020551896
1600,Ⅴ-1,subsoil,1.316931549,0.210070529,33.92476421,0.07511568,0.34827,1600,0,5,1.24193,38.42406577,4.33,22.34,73.33,0.4003587,0.2805637,0.02486507
1600,Ⅴ-1,subsoil,2.345493,0.210070529,32.52580486,0.05653768,0.302445,1600,0,4.96,1.0034,51.69324297,4.27,21.99,73.74,0.4139667,0.2824889,0.02486507
1600,Ⅴ-1,subsoil,1.732704749,0.210070529,33.22528454,0.06694136,0.3666,1600,0,5.01,1.50013,24.38055369,4.32,22.07,73.61,0.3953873,0.3082089,0.02486507
1600,Ⅴ-2,subsoil,8.491515489,0.492044393,44.30037938,0.10632672,0.5499,1600,0,4.85,1.36032,32.10568102,3.89,19.36,76.75,0.4805262,0.34348,0.002683034
1600,Ⅴ-2,subsoil,7.778411819,0.489224655,42.20194036,0.0944368,0.43992,1600,0,4.9,1.30481,31.76401162,3.93,19.6,76.47,0.4953793,0.3339983,0.002683034
1600,Ⅴ-2,subsoil,8.354106661,0.4779457,45.69933873,0.11078544,0.504075,1600,0,4.92,1.30585,38.43550178,3.98,19.74,76.28,0.4697456,0.3444185,0.002683034
1600,Ⅴ-3,subsoil,7.407165148,0.53997995,38.00506231,0.12862032,1.108965,1600,8,4.87,1.28503,33.83033859,3.54,16.64,79.82,0.3758922,0.3075011,0.015006387
1600,Ⅴ-3,subsoil,7.519907699,0.53997995,31.70974524,0.13307904,0.962325,1600,8,4.85,1.20844,38.95352686,3.47,16.24,80.29,0.3663005,0.287272,0.015006387
1600,Ⅴ-3,subsoil,7.519907699,0.534340473,40.10350134,0.120446,1.035645,1600,8,4.8,1.28057,33.79042145,3.51,16.37,80.12,0.3698313,0.2657089,0.015006387