Abstract:
This study was conduced during season (2005-2006) in the
experimental farm of the College of Agricultural studies, Sudan University
of Science and Technology (at Shambat) to determine the effect of ridge
orientation ( North-South and East-West) on growth and yield of three local
cultivars of onion ( Saggai Improved – Kamleen – Abufreiwa). The
experimental units were distributed according to complete randomized block
statistical design (CRBD) with four replications. The evaluation of the
vegetative growth and yield was done on plant height, plant fresh and dry
weight, bulbs diameters, sizes, and the dry weight of the bulbs and total
yield. The results revealed the presence of clear differences in growth among
the cultivars due to the planted side of the ridge. This effect was very clear
by both cultivars Kamleen and Saggai Improved, while the cultivar Abu
freiwa was not affected. Also there was a clear effect due to the ridge
orientation on the bulbs size in Saggei Improved an Kamleen varieties
where both saggai Improved and kameleen showed the highest percentages
of large bulbs (7 70 mm ө) when planted on both ridge sides (North-South)
compared to Abu freiwa which was not affected. However, there were no
clear differences in the total yield among the three cultivars grown the
different ridge orientations.
