IFDC Report, Volume 3, No. 4
Abstract
This report presents the findings of crop response data obtained from greenhouse experiments and field trials conducted with flooded rice, focusing on the relationship between fertilizer application technique (surface or deep placement) and nitrogen recovery. The study identifies the deep-placement technique, known as the "mudball" method, as a practical approach to improve fertilizer efficiency. However, the labour-intensive process of producing mudballs limits its widespread adoption. The report explores urea supergranules as an alternative to mudballs and discusses the controlled release in combination with deep placement as the most promising system for enhancing nitrogen recovery. The report also describes the granulation process and ongoing research on producing urea supergranules. The availability of urea in a suitable form for deep placement is a critical factor in the widespread adoption of this technique. The report concludes with discussions on international collaborations, feasibility studies for fertilizer production, and future research directions.
Description
Keywords
Urea, Nitrogen fertilizers