author = { Mohamed Awaad}
author = { Ragab Badr}
author = { Mamoduh Badr}
author = { Ahmed Abd-elrahman}
title - {Effects of different nitrogen and potassium sources on lettuce (Lactuca sativa L.) yield in a sandy soil}
journal  - {Eurasian Journal of Soil Science}
volume  - {5}
number  - {4}
publisher  - {Federation of Eurasian Soil Science Societies}
issn  - {2147-4249}
url  - {http://ejss.fesss.org/10.18393/2016.4.299-306}
doi - {10.18393/2016.4.299-306}
pages - {299 - 306}
keywords - {Urea-formaldehyde, urea, potassium sulphate, Lactuca sativa}
year  - {2016}