KIRISH ................................................................................................................3 I BOB. AZOT HAQIDA UMUMIY TUSHUNCHA .......................................6 1.1 Azot va uning birikmalari toksikologiyasi .....................................................6 1.2 Azotning ishlatilishi ........................................................................................8 II BOB. O’SIMLIKLAR O’ZLASHTIRISHIGA QULAY BO’LGAN AZOT FORMALARI …………………………………………………………..…….11 2.1 Azotga boy oziq-ovqatlar .............................................................................11 2.2 Azot sikli ......................................................................................................14 2.3 Biologik fiksatsiya ........................................................................................16 2.4 Azotning o’simlik hujayrasida uchrashi .......................................................18 2.5 Dukkakli o’simliklarda azotning uchrashi ...................................................20 III BOB. AZOTLI OʻGʻITLARNING O’SIMLIKLARGA TA’SIRI .........25 3.1 O’simliklarda azot yetishmasligi yoki ortiqchaligi alomatlari .....................25 3.2 O’simliklar uchun azotga boy o’g’itlar turlari .............................................28 Xulosa ...............................................................................................................31 Foydalanilgan adabiyotlar va manbalar .......................................................33