To develop a method to visualize diffusion of zinc from fertilizers.
Zinc diffusion was assessed for three fertilizers in three soils of varying pH.
The fertilizer (zincSO4-coated monoammonium phosphate, MAP; zincSO4-coated diammonium phosphate, DAP; or zincSO4 alone) was applied in the centre of a Petri dish filled with soil.
The zinc diffusion zone was visualized at various incubation times (1, 7 and 18 days) by exposing a CaCO3-impregnated filter paper on the soil surface and colouring the zinc captured on the filter paper using dithizone.
The extent of diffusion was also assessed through concentric sampling and chemical analysis of soil sections.
The visualization results agreed with the chemical analyses and demonstrated the effects of soil properties and fertilizer formulation on zinc diffusion.
Combining zinc with P fertilizer restricted its diffusion, particularly with DAP fertilizer or in high pH soils.
Solubility considerations indicated that this was due to the formation of zinc phosphate minerals.
Lead research organisation
Host research organisation
University of Adelaide
More Profit from Crop Nutrition
Other trial partners
Trial report and links
No trial reports or attachments found
Related Final Reports By Crop type and Region
None No crop specifiedSouthern
Searching GRDC final reports...
Related Final Reports By Author(s)
F Degryse, R Baird and R McLaughlin
Searching GRDC final reports...
Terms and conditions of use
Be advised that the data and information on this website:
may not be accurate, current or complete;
is subject to change without notice;
is continually being validated, enhanced and updated; and
is subject to the usual uncertainties of scientific research
To access this Online Farm Trials resource, please click the "Accept" button below.
The content of this website is provided for information purposes only. Access to the site is on the basis that you accept responsibility for assessing the accuracy of the data and information contained on the site. No responsibility will be accepted for any loss or damage, however caused, which you may directly or indirectly suffer in connection with your use of this website, nor do we accept any responsibility for any such loss arising out of your use of or reliance on information contained on or accessed through this website.
Use of Information
Except as set out otherwise in these terms and conditions, you are provided with access to this application only for your personal use and you may not without our written permission on-sell or rebadge information obtained from this website, or in any way represent that the information is from any source other than Online Farm Trials.
Copyright of materials presented on this website generally resides with the organisation that conducted the trial(s) (e.g. Grower Group, Research Organisation, Government Department), or may be shared with other collaborating research partners (e.g. research funders such as the GRDC), or by Federation University Austrailia. Apart from fair dealing for the purposes of private study, research, criticism or review, as permitted under copyright legislation, and apart from uses specifically authorised by these terms and conditions, no part may be reproduced or reused for any commercial purposes whatsoever.
Specifically, and other than for the purposes of and subject to the conditions prescribed under the Copyright Act 1968 and similar legislation which applies in your location, you may not in any form or by any means adapt, reproduce, store, create derivative works, distribute, print, display, perform, publish or commercialise any information, products or services obtained from any part of this website; without our written permission.
This website may contain links to linked websites. Those links are provided for convenience only and may not remain current or be maintained.
We are not responsible for the content or privacy practices associated with linked websites.
Our links to linked websites should not be constructed as any endorsement, approval, recommendation, or preference by us of the owners or operators of those linked websites, or for any information, graphics, materials, products or services referred to on those linked websites.
Security of Information
Unfortunately, no data transmission over the Internet can be guaranteed as totally secure. Whilst we strive to protect such information, we do not warrant and cannot ensure the security of any information which you transmit to us. Accordingly, any information which you transmit to us is transmitted at your own risk. Nevertheless, once we receive your transmission, we will take reasonable steps to preserve the security of such information.
Data and Systems Integrity
You acknowledge that we will not be responsible for any corruption or failed transmission of any information attributable to your computer system or to the system or any act or omission of your Internet Service Provider.
You agree that you will not use any device, software or routine to interfere or attempt to interfere with the proper working of the service or this site.
You acknowledge that access to the service or our website:
may not be continuous, uninterrupted or secure at all times; and
may be interfered with by factors or circumstances outside of our control.