15538
Effects of Azocompost and urea on the herbage yield and contents and compositions of essential oils from two genotypes of dragonhead ( Dracocephalum moldavica L . ) in two regions of Iran .
 Chemical: urea
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: urea