Research Article
The Effects of Weed-Crop Competition on Nutrient Uptake as Affected by Crop Rotation and Fertilizers
Department of Agronomy and Plant Breeding, Faulty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran
Ali Asghari
Department of Agronomy and Plant Breeding, Faulty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran
Aleksander Mikhailovic Tulikov
Department of Agronomy and Experimental Methods, Agricultural University of Timiriazev, Moscow, Russia