AU - H. R. Motaghian, AU - A. R. Hosseinpur, AU - F. Raiesi, AU - J. Mohammadi, TI - Effect of the wheat (Triticum aestivum L.) rhizosphere on the bioavailability and fractions of zinc in some calcareous soils PT - JOURNAL ARTICLE TA - JSTNAR JN - JSTNAR VO - 18 VI - 67 IP - 67 4099 - http://jstnar.iut.ac.ir/article-1-1994-en.html 4100 - http://jstnar.iut.ac.ir/article-1-1994-en.pdf SO - JSTNAR 67 ABĀ  - Rhizosphere is a small zone and has quite different chemical, physical, and biological properties from bulk soil. This research was performed to study the available Zn and its fractions in the wheat rhizosphere and bulk soils by using rhizobox at greenhouse conditions. Total organic carbon (TOC), dissolved organic carbon (DOC), microbial biomass carbon (MBC) and available Zn using 7 chemical procedures and Zn-fractions were determined in the rhizosphere and bulk soils. The results indicated that TOC, DOC and MBC in the rhizosphere were increased significantly (P CP - IRAN IN - LG - eng PB - JSTNAR PG - 137 PT - Research YR - 2014