Arif, M. S., Shahzad, S. M., Riaz, M., Yasmeen, T., Shahzad, T., Akhtar, M. J., … Buttler, A. (2017). Nitrogen-enriched compost application combined with plant growth-promoting rhizobacteria (PGPR) improves seed quality and nutrient use efficiency of sunflower. Journal of Plant Nutrition and Soil Science, 180(4), 464-473. https://doi.org/10.1002/jpln.201600615