The experiment in Al-Qaim city western Iraq to Study the effect of NP fertilizer application three levels ( 0 , 200 , 300 ) Kg NP. h-1 after cutting of barely crop in 2007 Using Random Complete Blocks Design ( RCBD ) with three replicates .
The maximum result was done through the fertilizer levels 300 Kg NP.h-1 in Significantly over the other levels in the plant height ( 72.53 cm ), Dry weight of plant ( 32.92 g / m 2 ), green forage yield( 4.90 Kg / m2), grain yield ( 12.77 g / plant ) , weight of 1000 seeds ( 35.8 g ) and grain number ( 61.7 grain / spikes ). On the other level 200 Kg NP. h-1Significantly superiorzed in spikes (177.3 spike / m2 ) on the level without fertilizer .