@article{
  author = {Makvandi, Asoodeh},
  title = {Effect of Biological and Chemical Nitrogen Fertilizers and Plant Density on Quan-titative and Qualitative yield of Silage Corn},
  journal = {Journal of Crop Nutrition Science},
  year = {2015},
  volume = {1},
  number = {2},
  pages = {36-48},
  doi = {}
}