Abstract This study was conducted under cold temperate climate condition in Khorasan during 2006-2008 growing season to determine the suitable preceding crop. nitrogen and crop residue management for wheat. A randomized complete block design in split-split plot arrangement with three replicates was used. Main plots were rotation with five different crops including wheat-wheat. https://www.footballmediaservices.com/product-category/welding-helmet-lenses/