Effect of Organic Amendments on Canola Yield and Some Soil Properties in the North of Khuzestan

This experiment was carried out to determine the effect of different organic residues on canola yield (Var.PF7045/91) and soil properties from 2001 to 2002 at Safiabad Agricultural Research Center of Dezful - Iran. The experimental design was a randomized complete block as a split plot arrangement of treatments with three replications. Organic residues including: sheep manure compost, sugar cane bagasse compost, wheat straw, were as main plots and their application rates were as subplots (5, 10 and 10 t/ha), also in each replication a control plot (without residue) was included. The results showed that the addition of various organic residue especially sheep manure compost and sugar cane bagasse compost caused an increase of canola grain yield compare to the control plot. Application of organic residues resulted in about one t/ha yields increase. On the other hand, application of organic residues caused to improve of soil organic matter content and decline of soil bulk density. Application of sheep manure compost or sugar cane bagasse compost at the rate of 5 t/ha with N.P.K fertilizers, based on soil testing, are recommended.