उर्वरक  हिन्दी देवनागरी में पढ़ें।

jal men vileyashil urvarak

urvarak (Fertilizers), ye aise rasayanik padarth hote hain, jo ped-paudhon ki vriddhi men bahut hi sahayak hote hain. pray: paudhon ko urvarak do prakar se diye ja sakate hain- (1) zamin men dalakar, jisase ye tatv paudhon ki jadon dvara avashoshit kar lie jate hain. (2) pattiyon par inaka chhidakav karane se pattiyon dvara ye avashoshit kar liye jate hain. urvarak paudhon ke liye avashyak tatvon ki poorti karate hain.

urvarakon ke prakar

krishi men fasalon ke adhik utpadan v paudhon ki vriddhi ke lie, naitrojan, phaausphoras, poteshiyam, kailshiyam adi tatvon ki avashyakata hoti hai. paudhe in tatvon ko bhoomi se grahan karate hain. lekin dhire-dhire bhoomi men in tatvon ki kami ho jati hai. is kami ko poora karane ke lie kritrim roop se banaye ge tatvon ke yaugik bhoomi men milae jate hain. kritrim roop se banaye ge in yaugikon ko hi urvarak kahate hain. yadi tatvon ke in yaugikon ko bhoomi men n milaya jae, to bhoomi ki utpadakata kam ho jayegi. urvarak kee prakar ke hote hain. inaka vivaran is prakar se hai-

naitrojan ke urvarak

in urvarakon men mukhyat: naitrojan tatv paya jata hai. kuchh pramukh naitrojan yaugik is prakar se hain-

  • yooriya - yooriya men 46% naitrojan paee jati hai.
  • amoniyam salphet - isamen naitrojan amoniya ke roop men upasthit rahati hai tatha isamen amoniya ki matra lagabhag 25% payi jati hai. yah aloo ki fasal ke lie achchha urvarak hai. isaka prayog choona rahit bhoomi men nahin kiya jata hai.
  • kailsiyam naitet - yah naitrojan ka sabase achchha urvarak hai. bazar men yah ‘narvejiyan saltapitar’ ke nam se jana jata hai.
  • kailshiyam nayanaid - is urvarak ka buaee karane se pahale bhoomi men chhidakav kiya jata hai. paudhon ki vriddhi ke samay is urvarak ka prayog paudhon ke lie labhaprad nahin hota hai.

poteshiyam ke urvarak

poteshiyam kloraid, poteshiyam naitret, poteshiyam salfet adi poteshiyam ke kuchh pramukh urvarak hain.

phaausphoras ke urvarak

supar phaausphet aauf laim, phaauspheti dhatumal, phaausphoras ke pramukh urvarak hain. supar phaausphoras ko haddiyon ko pisakar banaya jata hai.

mishrit urvarak

is prakar ke urvarakon men ek se adhik tatv paye jate hain. jaise-amoniya phaausphoras, amoniyam supar phaausphoras adi.


panne ki pragati avastha
adhar
prarambhik
madhyamik
poornata
shodh

tika tippani aur sndarbh

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