Wednesday, 8 October 2008

George R. Brown Convention Center, Exhibit Hall E

Jack Deodato C. Jacob, Sarah E. J. Beebout and Roland J. Buresh, Crop and Environmental Sciences Division, International Rice Research Institute (IRRI), DAPO Box 7777, Metro Manila, Philippines

Zinc is the most common micronutrient deficiency in flooded rice. It is applied to the soil as a granular fertilizer, usually zinc sulfate or zinc oxide. Zinc fertilizers are sometimes adulterated, and it has been difficult for distributors and farmers to know if they are buying quality fertilizer. Knowledge of plant Zn status may enable farmers to add fertilizer in time to overcome Zn deficiency. The common tests for plant Zn status require a laboratory analysis, making them ineffective for timely Zn management in the field. A colorimetric method was developed for quantitatively determining Zn in fertilizer and rice plant samples using simple laboratory equipment. This method was further developed into a semi-quantitative testing kit for use in the field.

See more of: Soil Test Method Development, Calibration and Utilization (Posters)
See more of: S08 Nutrient Management & Soil & Plant Analysis

2008 Joint Annual Meeting (5-9 Oct. 2008): Colorimetric Method for Determining Zinc in Granular Fertilizers and Rice Plant Tissues.

772-5 Colorimetric Method for Determining Zinc in Granular Fertilizers and Rice Plant Tissues.