Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India von Singh, Bijay, Singh, Yadvinder, Ladha, Jagdish K., Bronson, Kevin F., Balasubramanian, Vethaiya, Singh, Jagdeep, Khind, Charan S.

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Adaptability of nitrate specific ion electrode for nitrate analysis in tropical soils [by] V. Balasubramanian and Y. Kanehiro von Balasubramanian, Vethaiya

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Calibrating the leaf color chart for nitrogen management in different genotypes of rice and wheat in a systems perspective von Shukla, A.K, Ladha, J.K, Singh, V.K, Dwivedi, B.S, Balasubramanian, V, Gupta, R.K, Sharma, S.K, Singh, Y, Pathak, H, Pandey, P.S

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