RT - Journal Article T1 - Effect of the wheat (Triticum aestivum L.) rhizosphere on the bioavailability and fractions of zinc in some calcareous soils JF - JSTNAR YR - 2014 JO - JSTNAR VO - 18 IS - 67 UR - http://jstnar.iut.ac.ir/article-1-1994-en.html SP - 137 EP - 149 K1 - Rhizosphere K1 - Zinc K1 - Fractions K1 - Chemical extractants. AB - 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 LA eng UL http://jstnar.iut.ac.ir/article-1-1994-en.html M3 ER -