@article{article,
title = {Effect of mineral nitrogen on symbiotic nitrogen fixation in lucerne. I. The effect of fertilizing with calcium ammonium nitrate on nodule formation, yield and nitrogen content in lucerne (Medicago sativa L.) in gajnjaca and parapodzol},
author = {Petrovic, V.},
year = {1968},
journal = {Zemlj. Biljka},
volume = {17},
pages = {227-242},
howpublished = "\url{https://eurekamag.com/research/014/440/014440896.php}"
}