- Board, J.E. (2004). Soybean cultivar differences on light interception and leaf area index during seed filling. Agron. J. 96: 305-310.
- Dong, Z. (1999). Soybean yield physiology. Agricultural Press, Beijing, China, pp. 135-137 (In Chinese).
- Eberbach, P. and Pala, M. (2005). Crop row spacing and its influence on the partitioning of evapotranspiration by winter-Â Â Â grown wheat in Northern Syria. Plant Soil 268: 195-208.
- Flenet, F., Kiniry, J.R., Board, J.E., Westgate, M.E. and Reicosky, D.C. (1996). Row spacing effects on light extinction coefficients of corn, sorghum, soybean and sunflower. Agron. J. 88: 185-190.
- Girma, A., Skidmore, A.K., de Bie, C.A.J.M., Bongersc, F. and Schlerfa, M. (2013). Photosynthetic bark: Use of chlorophyll absorption continuum index to estimate Boswellia papyrifera bark chlorophyll content. Int. J. Appl. Earth Obs. 23: 71-80.
- Hamzei, J. and Soltani, J. (2012). Deficit irrigation of rapeseed for water-saving: Effects on biomass accumulation, light interception and radiation use efficiency under different N rates. Agric. Ecosyst. Environ. 155: 153-160.
- Hill, J., Nelson, E., Tilman, D., Polasky, S. and Tiffany, D. (2006). Environmental, economic, and energetic costs and benefits of biodieseland ethanol biofuels. Proc. Natl. Acad. Sci. U.S.A. 103: 11206-11210.
- Hunt, T.E., Higley, L.G. and Witkowski, J.F. (1994). Soybean growth and yield after simulated bean leaf beetle injury to seedlings. Agron. J. 86: 140-146.
- Kriedmann, P.E. and Barrs, H.D. (1983). Photosynthetic adaptation to water stress and implication for drought resistance. Boulder, Colorado: Westbiew Press. 201-223.
- Kumudini, S., Hume, D.J. and Chu, G. (2001). Genetic improvement in short season soybeans. Crop Sci. 41: 391-398.
- Norsworthy, J.K. and Shipe, E.R. (2005). Effect of row spacing and soybean genotype on main stem and branch yield. Agron. J. 97: 919-923.
- Ren, J.Q., Chen, Z.X., Tang, H.J. and Shi, R.X. (2006). Regional yield estimation for winter wheat based on net primary production model. Transactions of the CSAE. 22: 111-117.
- Ritchie, S.W., Hanway, J.J., Thompson, H.E. and Benson, G.O. (1994). How a soybean plant develops. In Special Report 53, Rev (Ed. I. Ames). USA: Iowa State University Cooperative Extension Service.
- Singer, J.W. (2001). Soybean light interception and yield response to row spacing and biomass removal. Crop Sci. 41: 424-429.
- Wang, G.Y., Han, Y.Y., Zhou, X.B., Chen, Y.H. and Ouyang, Z. (2014). Planting pattern and irrigation effects on water-use efficiency of winter wheat. Crop Sci. 54: 1166-1174.
- Wang, T.C., Wei, L., Wang, H.Z., Ma, S.C. and Ma, B.L. (2011). Responses of rainwater conservation, precipitation-use efficiency and grain yield of summer maize to a furrow-planting and straw-mulching system in northern China. Field Crops Res. 124: 223-230.
- Westgate, M.E. (1999). Managing soybeans for photosynthetic efficiency. World Soybean Res. P. 2: 223-228.
- Zhang, X.Z. (1992). Methods of crop physiology analysis. Agricultural Press, Beijing, China. pp. 50-51 (In Chinese).
- Zhou, X.B, Chen, Y.H. and Ouyang, Z. (2011). Row spacing effect on leaf area development, light interception, crop growth and grain yield of summer soybean crops in Northern China. Afr. J. Agric. Res. 6: 1430-1437.
- Zhou, X.B., Yang, G.M., Sun, S.J. and Chen, Y.H. (2010). Plant and row spacing effects on soil water and yield of rainfed summer soybean in the northern China. Plant Soil Environ. 56: 1-7.