Abstract
Abstract A greenhouse study was conducted to evaluate the use of siliceous ferrihydrite as a slow release Fe fertilizer for a sandy calcareous soil from the Coastal Bend area of Texas. This soil is low in amorphous Fe oxide and has a history of severe Fe chlorosis. Siliceous ferrihydrite was prepared in the laboratory by reaction of ferric sulfate with NaOH in the presence of varying amounts of sodium silicate. Silicate was used during the synthesis of ferrihydrite structure to: (1) promote the formation of smaller crystals with higher reactive surface areas, and (2) inhibit the transformation of this material to more crystalline phases. Cumulative amount of Fe released from each of the materials after six successive DTPA extractions was related to the Si/Fe ratio of the ferrihydrite. The greenhouse results indicated that at the level of 100 mg Fe per kg, Fe‐.75 Si and Fe(III) were equally effective in reducing chlorosis; however, Fe(II) was a much less effective source of Fe. The Fe supplying abilities o...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
