Agricultural Research Corporation (ARC) - Sudan
Proceedings of the Meetings of the National Crop Husbandry Committee - NCHC
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Effect of time and split application of nitrogen on bulb yield of
onion at Kassala
Mohammed ELNaseeh M. Osman and El Naeim A. Ali
Abstract:
This investigation was prompted by the unique method of applying urea on
wet soil after irrigation practiced by many farmers in Kassala area.
Their justification was to minimize washing and leaching of urea by
incoming water if applied before irrigation. Also the nature of urea
hydrolysis and volatilization, in addition to the light soil of Kassala
with good permeability can all enhance nitrogen losses. This study was
carried out to suggest means to minimize nitrogen losses and improve
response of onion yield to the applied urea. A fixed dose of 86 kg.N/ha
from urea was either applied as one or splited in two, or three doses
before or after irrigation. Nitrogen application after irrigation
(farmers practice) reduced bulb yield by 10.2%, i.e. application before
irrigation increased the yield by 11.4%. Splitting the 86 kg.N/ha from
urea into 2 or 3 applications raised onion yield by 11% when applied
before irrigation. It was recommended to apply urea for onions in 2
doses 4+4 weeks before irrigation.
Proceedings of the Meetings of the National Crop Husbandry Committee 37th (2005) pp. 180-185
Proceedings of the Meetings of the National Crop Husbandry Committee - Sudan
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