اعلانات هامة

This work was carried out during the season of 2010-2011 under the irrigated conditions of Deirezzor at field east (Mohasan village) of the governorate.

It aims to determine the best level of organic fertilizer for rape crop (Var. Bromin) and best sowing date. Split-plat design with three replicates was done, where orgnic fertilizer treatments (cow dungs) were assigned for main plots with fire levels (0, 10, 20, 30, 40 t/ha) and sowing dates were assigned for sub-plots with three dates (1.15 and 30 November).

Results showed that increasing organic fertilizer levels up to 40 ton/ha. led to positive significant effect on plant height, leave area, number of pod/plant, number of seeds/pad and weight of 1000 seeds along with increasing green yield, seed yield and oil yield, while oil percent per seed was reduced with increasing organic fertilizer level. Sowing rape crop on 15 November led to a significant effect on all the studied traits compared to rest of the sowing dates.

The interaction effect between organic fertilizer and sowing date indicated superiority of the treatment G40 D2 to rest of the treatments in all the studied parameters, except oil percent in the seed.

Key words: rape, organic fertilizer levels; sowing date; productivity