Chlorophyll Meter and Leaf Colour Chart - A Tool to Increase Yield and NUE in Rice (Oryza sativa L.)
Abhinav Yadav*
Dept. of Agronomy, CSAUA&T, Kanpur, Uttar Pradesh (208 002), India
Anurag Singh Suman
Dept. of Soil Science & Agricultural Chemistry, BUA&T, Banda, Uttar Pradesh (210 001), India
Sudhir Pal
Dept. of Agronomy, BUA&T, Banda, Uttar Pradesh (210 001), India
Vedangi Awasthi
Dept. of Agronomy, BUA&T, Banda, Uttar Pradesh (210 001), India
Rajat Yadav
Dept. of Agronomy, CSAUA&T, Kanpur, Uttar Pradesh (208 002), India
DOI: NIL
Keywords: Infrared light, SPAD, Synchronization, Wavelength
Abstract
Rice is a staple food crop of more than 60% of the world’s population. It is a staple food crop of the most of people of south-eastern Asia. One of the most important inputs in South Asian Rice-Wheat cultivation systems is fertilizer nitrogen (N). Improvement in N use efficiency could only be made so far because fertilizer N has often been managed using general guidelines that call for two or three split applications of preset rates of the total amount of N. The best fertilizer N management approach to increase N use efficiency is feeding crop N demands. Plant N status at any one time should be a better indicator of the N availability since plant growth reflects the total N supply from all sources. The leaf colour chart and chlorophyll meter have become diagnostic instruments that can help define and indirectly measure crop N status of growing crops.
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Reference
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