HomeInternational Rice Research Notesvol. 27 no. 2 (2002)

Determining the Leaf Color Chart Threshold Value for Nitrogen Management in Rainfed Rice

V.v. Angadi | S. Rajakumara | * Ganajaxi | A. Y. Hugar | B. Basavaraj | S.v. Subbaiah | V. Balasubramanian

Discipline: Agriculture

 

Abstract:

At present, blanket recommendations are being adopted for N application to rice. Although these recommendations have been based on the nutritional status of the soil and crop response studies, they cannot fully match the actual crop need under a given situation. The SPAD meter and the leaf color chart (LCC) have been found to be very effective tools for N management in rice based on actual crop need. The LCC is simple and easy to carry and is a cheaper tool than the SPAD meter. It can be easily introduced into the farmer’s field. The threshold value of the LCC is known to differ with location, season, rice ecosystem, and variety.