A COMPARATIVE STUDY OF DIFFERENT METHODS FOR OBTAINING AN INDEX OF NITROGEN AVAILABILITY IN UPLAND SOILS

Authors

  • FAOIR HUSSAIN Soil Biology Division, Nuclear Instiuae for Agriculture and Biology, Fuisalabad,Pakistan
  • KAUSER A. MALIK Soil Biology Division, Nuclear Instiuae for Agriculture and Biology, Fuisalabad, Pakistan
  • MAZIlAR H. NAQVl Soil Biology Division, Nuclear Instiuae for Agriculture and Biology, Fuisalabad, Pakistan

Keywords:

Alkaline KMn04 extraction, Incubation, N uptake, Soil N availability.

Abstract

A study on 50 soils with wide range of properties was conducted to find out a simple, rapid and reliable method
of obtaining an index or soil N availability. Three chemical methods; mineral plus mincralizablc N determination by
modified alkaline permanganate method, mineral N as (NH4 + NO)) and NOJ-N estimation by 2 NKCI were found
promising as the soil N values obtained by these methods showed high correlation with mineral N of incubation test
(r = 0.92, 0.88 and 0.85, respectively) and N uptake by wheat plants (r = 0.90, 0.87 and 0.85, respectively). The
relationship between yield response of wheat plants to applied N in pots and soil available N determined by the three
methods was also studied.

Published

2022-06-09

How to Cite

HUSSAIN , F. ., MALIK , K. A. ., & NAQVl , M. H. . (2022). A COMPARATIVE STUDY OF DIFFERENT METHODS FOR OBTAINING AN INDEX OF NITROGEN AVAILABILITY IN UPLAND SOILS. Biological Sciences - PJSIR, 37(6-7), 258–264. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/2679

Issue

Vol. 37 No. 6-7 (1994): Pakistan Journal of Scientific and Industrial Research

Section

Articles