ﺗﺎﺛﯿﺮ ﺳﻄﻮح ﻣﺨﺘﻠﻒ ﮐﻮد ﻧﯿﺘﺮوژن روی روﻧﺪ اﺳﯿﻤﯿﻼت، ﭘﺮ ﺷﺪن ﻏﺪه و ﭘﺮوﺗﺌﯿﻦ در ارﻗﺎم زودرس و دﯾﺮرس ﺳﯿﺐ زﻣﯿﻨﯽ

Effect of nitrogen fertilizer levels on assimilate, tuber filling process and protein in early and late maturing cultivars of potato