Agricultural Reviews, volume 25 issue 4 (december 2004) : 309 - 312

CHLOROPHYLL METER AS A TOOL TO DETERMINE THE TIME OF APPLICATION OF N IN RICE (ORnA SATWA L.) - A REVIEW

K.R. Pushpanathan, M. Vijaya Kumar, K. Siddeswaran

Affiliations

¹Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore - 641 003, India

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Cite article:- Pushpanathan K.R., Kumar Vijaya M., Siddeswaran K. (2025). CHLOROPHYLL METER AS A TOOL TO DETERMINE THE TIME OF APPLICATION OF N IN RICE (ORnA SATWA L.) - A REVIEW. Agricultural Reviews. 25(4): 309 - 312. doi: .

ABSTRACT

Chlorophyll meter is a promising tool for adjusting the rate and time of nitrogen application for different rice fields. Chlorophyll meter measures the leaf chlorophyll content, which is closely related to the leaf N content as well as photosynthetic rate. The SPAD (Soil Plant Analysis Division) technique ensures supply of N to the crop as and when there is demand for N and has been reported to result in higher N use efficiency. Fixing the critical SPAD value for N top dressing in the rice has been discussed.

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CHLOROPHYLL METER AS A TOOL TO DETERMINE THE TIME OF APPLICATION OF N IN RICE (ORnA SATWA L.) - A REVIEW

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