Soil and Water Management Research Institute, Kattuthottam, Thanjavur - 603 001, India
1Crop and Resource Management Network, IRRI, Philippines.
Results of experiments conducted to standardise the critical leaf colour chart values in comparison with SPAD based N management techniques for transplanted rice (in Cauvery new delta zone) indicated that in dry season leaf colour chart colour shade 4 based nitrogen management and in wet season leaf colour chart colour shade 5 based nitrogen management recorded higher grain yield and found comparable with SPAD 37 based nitrogen nitrogen management.
