[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
[1]College of Resources;
Sichuan Agricultural University;
Chengdu 611130;
P.R.China;
soil nutrient; spatial variability; affecting factors; purple soil hilly area of China;