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W. Haijiang, L. Dongdong, H. Zhenan, and L. Xin, Spatial and temporal variability of soil nutrients in farmland based on GIS

, Xinjiang Agricultural Sciences, issue.10, pp.1872-1878, 2013.

C. Zhao-yue-ling, W. Gui-fen, and . Yue, Study on Spatial Variability of Soil Nutrients Based on GIS, Northwest Agricultural Sciences, pp.195-198, 2005.

J. Jian, Based on the spatial fuzzy clustering of visual variable fertilization decisionmaking system

W. Zhao-yue-ling, H. Yan-guo, C. Hai-yan, and . Gui-fen, Spatial Variation of Soil Nutrients in Typical Black Soil Region of Jilin Province, China Agricultural Mechanization, pp.72-75, 2012.

J. Jian and C. Guifen, Study and Realization of Three-dimensional Visualization of Soil Nutrients Based on VTK

, Agricultural Network Information, issue.03, pp.10-13, 2011.

L. Qin and . Peng, ArcScene campus three-dimensional scene of the establishment

, Chinese names, pp.78-79, 2014.

. Lu-xiao-nan, W. Ma-wan-zhi, and . Xiao-fu, Spatial variability of soil fertility in agricultural science and technology demonstration park supported by GIS technology, J]. Journal of Zhejiang Agricultural Sciences, issue.03, pp.3-6, 2004.

C. Hang, C. Liying, and C. Guifen, Study and application of temporal and spatial variability of soil fertility, Journal of Chinese Society of Agricultural Mechanization, issue.04, pp.268-273, 2014.

H. Shengwu and L. Kunpeng, Three-dimensional GIS key technology research

, Geospatial Information, issue.03, pp.9-12, 2008.

, Project Funding: The national spark program project :Precise operation technology integration and demonstration of corn, 2015660004.

, Brief Introduction of Author

, Heilongjiang Yichun, master's degree. Research Direction: artificial intelligence and computer agriculture applications, male, Han nationality, 1993.

, * corresponding author, professor, doctoral tutor, engaged in artificial intelligence, data mining and precision agriculture research, E-mail: guifchen@163.com. ???????????????2888???????? ??? ?????