Effect of the gradual release of nitrogen by manure fertilizers pellet on the different periodic irrigation on some quantitative and qualitative characteristics of sunflower (Helianthus annuus L.)

Document Type : Original Article

Authors

1 Ph.D Student, Department of Agronomy, Faculty of Agriculture, Maraghe University, Maraghe, Iran.

2 Associated Professor, Department Agronomy, College of Abouraihan, University of Tehran, Tehran, Iran.

3 Professor, Department Agrotechnology, College of Abouraihan, University of Tehran, Tehran, Iran.

4 Research Assistant Professor, Agriculture and Natural Resources Research Station Ardabil, Ardabil, Iran.

5 Assistant Professor, Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran.