@article{
  author = {burbur, Mohamadreza, Seifzadeh, Saeed, Eradatmand Asli, Davoud},
  title = {Effect of plant densities on extinction  coefficient,grain yield and yield components of Varieties of grain Sorghum},
  journal = {New Finding in Agriculture},
  year = {2014},
  volume = {8},
  number = {31},
  pages = {207-218},
  doi = {}
}