The objectives of this work were two-fold. First, to investigate urea transformation in several repesentative soils of Egypt. Second ,to evaluate the extent and nature of nitrogen loss from urea during its transformation proc-ess in soil. 2.5- Storage spikes for two weeks significantly decreased floret opening percentage to nearly third. Decreased storage period to 5 or 10 days only diminished this harmful effect.2.6- Pre-storage pulsing with spermine at 1 ppm for the spikes stored for 5 days resulted in the highest opening percentage.2.7- The spikes stored for two weeks showed less increase in fresh weight comparing to one week storage while storing spikes for 5 or 10 days attained increase in fresh weight percentage up to 6 days in the preservative solution. Prestorage pulsing with spermine at 1-5 ppm attained the increase in fresh weight percentage up to 10 days in the preservative solution for the spikes stored for 5 days only.2.8- Storing tuberose spikes for two weeks significantly decreased soluble, non soluble and total carbohydrates in the petals. Also decreasing storage period to 5 or 10 days showed similar significant reduction in carbohydrates percentage.2.9- Pre-storage pulsing with spermine at 1 or 2.5 ppm enhanced soluble, non soluble and total carbohydrates in the petals.2.10- The interaction between storage period and prestorage pulsing with spermine indicate that prestorage pulsing with spermine at 1 or 2.5 ppm improved soluble, non soluble and total carbohydrates percentage in the petals.