TY  - JOUR
AU  - Mehrpouyan, Mehdi
AU  - golchin, ahmad
AU  - jamshidi, soleiman
TI  - Effects of four nitrogen fertilizer sources on seed and oil yield of rapeseed and nitrogen residues in the soil
JO  - Agroecology Journal
VL  - 7
IS  - 2
SP  - 53
EP  - 61
PY  - 2011
DO  - 
ER  -