Becker-Reshef, E., Vermote, A., Lindeman, M. and Justice, C. (2010). A generalized regression-based model for forecasting winter wheat yields in Kansas and Ukraine using MODIS data. Remote Sensing of Environment, 114, 1312–1323.
Brus, DJ., Kempen, B. and Heuvlink, GBM. (2011). Sampling for validation of digital soil maps. European Journal of Soil Science, 62, 394–407.
Cahn, M. D., Hummel, J. W. and Brouer, B. H. (1994). Spatial analysis of soil fertility for site-specific crop management. Soil Science Society American Journal, 58, 1240-1248.
Charles, J., Godfray, J., Beddington, J.R., Crute, I.R., Haddad, L., Lawrence, D., Muir, J.F., Pretty, J., Robinson, S., Thomas, S.M. and Toulmin. C. (2010). Food security: the challenge of feeding 9 billion people. Science, 327, 812–818.
Chen, Z. X., Ren, J. Q., Zhou, Q. B. and Tang, H. J. (2008). Regional yield estimation for winter wheat with MODIS-NDVI data in Shandong, China. International Journal of Applied Earth Observation and Geoinformation, 10, 403−413.
Chipanshi, A. C., Ripley, E. A. and Lawford, R. G. (1999). Large-scale simulation of wheat yields in a semi-arid environment using a crop-growth model. Agricultural Systems, 59, 57−66.
Doraiswamy, P. C., Moulin, S., Cook, P. W. and Stern, V. (2003). Crop yield assessment from remote sensing. Photogrammetric Engineering and Remote Sensing, 69, 665−674.
Florinsky, IV., McMahon, S. and Burton, DL. (2004). Topographic control of soil microbial activity: a case study of denitrifiers. Geoderma, 119: 33-53.
Johari, A., Habibagahi, G. and Ghahramani, A. (2006). Prediction of soil–water characteristic curve using genetic programming. Journal of Geotechnical and Geoenvironmental Engineering, 132, 661–665.
Khattree, R. and Naik, D. N. (2000). Multivariate Data Reduction and Discrimination with SAS Software. SAS Institute Inc., Cary, NC.
Koza, J., Bennett, H., Andre, D. and Keane, M. (1999). Genetic programming 400 III: Darwinian invention and problem solving. Burlington, MA: Morgan Kaufmann.
Kravchenko, AN. And Bullock, DG. (2000). Correlation of corn and soybean grain yield with topography and soil properties. Agronomy Journal, 92, 75-83.
Li, Y., Shi, Z., Li, F. and Li, H. Y. (2007). Delineation of site-specific management zones using fuzzy clustering analysis in a coastal saline land. Computers and Electronics in Agriculture, 56, 174-186.
Macdonald, RB. and Hall, FG. (1980). Global crop forecasting. Science, 208, 670–679.
Makkeasorn, A., Chang, NB., Beaman, M., Wyatt, C. and Slater, C. (2006). Soil moisture estimation in a semiarid watershed using RADARSAT- 1 satellite imagery and genetic programming. Water Resources Research, 42, 1-15.
Maselli, F. and Rembold, F. (2001). Analysis of GAC NDVI data for cropland identification and yield forecasting in Mediterranean African countries. Photogrammetric Engineering and Remote Sensing, 67, 593−602.
Mathworks, 2010. Matlab Version 7.0. The Mathworks Inc., Natick, MA.
McBratney, AB., Mendonca-Santos, ML. and Minasny, B. (2003). On digital soil mapping. Geoderma, 117,3–52.
Mouser, P. J., Rizzo, D. M., Roling, W. F. M. and Van Breukelen, B. M. (2005). A multivariate statistical approach to spatial representation of groundwater contamination using hydrochemistry and microbial community profiles. Environmental Science & Technology, 39, 7551-7559.
Nosrati, H. and Eftekhari, M. (2014). A new approach for variable selection using fuzzy logic. Computational Intelligence in Electrical Engineering, 4, 71-83.
Padarian, J., Minasny, B. and McBratney, A. (2012). Using genetic programming to transform from Australian to USDA/FAO soil particle-size classification system. Australian Journal of Soil Research, 50, 443-446.
Padarian, J., Minasny, B. and McBratney, A. (2012). Using genetic programming to transform from Australian to USDA/FAO soil particle-size classification system. Australian Journal of Soil Research, 50, 443–446.
Padilla, F. L. M., Maas, S. J., Gonz, M.P., Lez-Dugo., F. Mansilla, N., Rajan, Gavil, P., and Donguez, J. (2012). Monitoring regional wheat yield in Southern Spain using the GRAMI model and satellite imagery. Field Crops Research, 130, 145–154.
Parasuraman, K., Elshorbagy, A. and Si, BC. (2007). Estimating saturated hydraulic conductivity using genetic programming. Soil Science Society of American Journal, 71, 1676–1684.
Rembold, F., Atzberger, C., Savin, I. and Rojas, O. (2013). Using Low Resolution Satellite Imagery for Yield Prediction and Yield Anomaly Detection. Remote Sensing, 5, 1704-1733.
Shabani, A., Haghnia, Gh., Karimi, A. and Ahmadi, M.M. (2012). Influence of Topography and Soil Characteristics on the Rainfed Wheat Yield in Sisab Region, Northeastern Iran. Journal of Water and Soil, 26, 922-932.
Shahbazi, F., Jafarzadeh, A.A., Sarmadian, F., Neyshaboury, M.R., Oustan, Sh., Anaya- Romero, M. and De la Rosa, D. (2009). Suitability of Wheat, Maize, Sugar Beet and Potato Using MicroLEIS DSS Software in Ahar Area, North-West of Iran. American-Eurasian Journal of Agriculture and Environment Science, 5, 45-52.
Soil survey staff. (2010). Keys to soil taxonomy. Eleventh Edition. USDA. NRCS. 338pp.
Taghizadeh-Mehrjardi, R. (2015). Digital mapping of cation exchange capacity using genetic programming and soil depth functions in Baneh region, Iran. Archive of Agronomy and Soil Science, xxx-xxx.
Toscano, P., Ranieri, R., Matese, A., Vaccari, F. P., Gioli , B. A., Zaldeia, M., Silvestri, C., Ronchi, P., La-Cava, J.R., Porter, A. and Miglietta, F. (2012). Durum wheat modeling: The Delphi system, 11 years of observations in Italy. European Journal of Agronomy, 43, 108–118
Tucker, C.J., Vanpraet, C., Boerwinkel, E. and Gaston, A. (1983). Satellite remote sensing of total dry matter production in the Senegalese Sahel. Remote Sensing of Environment, 13, 461–474.
Tucker, CJ., Holben, BN., Elgin, JH. and McMurtrey, JE. (1981). Remote sensing of total dry-matter accumulation in winter wheat. Remote Sensing of Environment, 11, 171–189.
Wall, L., Larocque, D. and Leger, P. M. (2007). The early explanatory power of NDVI in crop yield modeling. International Journal of Remote Sensing, 29, 2211−2225.
Wilding, L. (1985). Spatial variability. Its documentation, accommodation, and implication to soil surveys. In: D. R. Nielson and J. Bouma (Eds). Soil Variability, Pudo, Wagenigen, the Netherlands.