questions: asking about the problem of overdose of urea and its remedy. 
 answers: advised to irrigate the maize field to remove excess urea.excess n fertilizer will increase height of the plant,plant will bear less flower.actual dose of fertilizer in maize is 18 kg urea/bigha,33 kg ssp/bigha,mop 8 kg/bigha.spacing row 60 cm and plant 25 cm.