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Current IssueEditorial BoardOnline First ArticlesArchive

volume 29 issue 4 (december 2008) : 306 - 310

LEAF COLOUR CHART FOR NITROGEN MANAGEMENT IN RICE– A REVIEW

C
C. Sudhalakshmi
V
V. Velu
T
T.M. Thiyagarajan
1Department of Soil Science and Agricultural Chemistry Tamil Nadu Agricultural University, Coimbatore- 641 003.

  • Submitted|

  • First Online |

  • doi

Cite article:- Sudhalakshmi C., Velu V., Thiyagarajan T.M. (2025). LEAF COLOUR CHART FOR NITROGEN MANAGEMENT IN RICE– A REVIEW. Agricultural Reviews. 29(4): 306 - 310. doi: .

ABSTRACT

Leaf Color Chart (LCC) has substituted chlorophyll meter (SPAD) to estimate the leaf nitrogen (N) status of rice (Oryza sativa L.) and for timely N fertilizer application. It is an inexpensive, simple and easy to use tool with six shades of greenness from light yellow to dark green. LCC readings are taken once in a week, starting from 14 days after transplanting for transplanted rice and 21 days after seeding for wet seeded rice. Readings are taken once every 7 – 20 days until the first flowering. The critical value is 3 for varieties with light green foliage and 4 for all other varieties and hybrids. If the critical value of the leaf falls below the threshold value, 35 kg N/ha during kar/kuruvai/navarai and 30 kg N/ha during samba/thaladi/pishanam season need to be applied. As nitrogen supply matches with the crop demand, there is considerable yield increase under LCC - N management and because of the optimum N supply, there is saving of nitrogenous fertilizers to the tune of 20 – 40 kg/ha

KEYWORDS

    REFERENCES

    1. Balasubramanian, V. et al. (1999). Nutr. Cycl. Agroecosyst. 53 : 59 -69.
    2. Cassman, K.G. et al. (1994). In: Hybrid Rice Technology; New Developments and Future Prospects. IRRI, Los Banos,
    3. Philippines, pp. 81-96.
    4. Christopher Lourduraj, A. and Velu, V. (2001). In : Proceedings of the Rice Scientists’ Meet – 2001, TNAU, Coimbatore.
    5. Furuya, S. (1987). Jap. Agric. Res. Quar. 20: 147 -153.
    6. IRRI. (1996). IRRI Annual Report. Int. Rice Res. Inst., P.O Box. 933, Manila 12099, Philippines.
    7. Kropff, M.J. et al. (1993). Plant Soil. 155/ 156: 391 -394.
    8. Meelu, O.P. and Gupta, R.K. (1980). Int. Rice Res. Newsl. 5: 20–21
    9. Peng, S. and Cassman, K.G. (1998). Agron. J. 90:178–185
    10. Peng, S. et al. (1995). Crop Sci. 35 : 1627- 1630.
    11. Ramasamy, M. and Anitha, N.S. (2001). In: Rice Scientists’ Meet Report – 2001, Tamil Nadu Agricultural University,
    12. Coimbatore.
    13. Shiga, H. et al. (1977). In: Proc. Int. Seminar on Soil Environ. and Fertil. Manage. Intensive Agric., 20 Aug.1977,
    14. Tokyo, Japan. pp: 223- 229.
    15. Singh, Bijay et al. (2002). Agron. J. 94:821–829
    16. Takabe, M. and Yoneyama, T. (1989). JARQ. 23 : 86 -93.
    17. Tanno, F. (1988). Japan J. Soil Sci. and Plant Nutr. 59 : 423 – 428.
    18. Tanno, F. et al. (1982). Bull. Fukhushima Pref. Agr. Exp. Stat. 21: 61 -72.
    19. Wells, B.R. and Turner, F.T. (1984). In: Rd. Hacuk (Eds.) American Society of Agronomy, Madison, Wisconsin, USA. pp: 349 – 362.
    20. Velu, V. et al. (2001). In : Rice Scientists’ Meet Report – 2001, TNAU, Coimbatore.
    21. Thiyagarajan, T.M. et al. (2000). IRRN. 25 (1) : 30 -32.
    22. Thiyagarajan, T.M. et al. (2001). In: Rice Scientists’ Meet Report - 2001, Tamil Nadu Agricultural University, Coimbatore
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      volume 29 issue 4 (december 2008) : 306 - 310

      LEAF COLOUR CHART FOR NITROGEN MANAGEMENT IN RICE– A REVIEW

      C
      C. Sudhalakshmi
      V
      V. Velu
      T
      T.M. Thiyagarajan
      1Department of Soil Science and Agricultural Chemistry Tamil Nadu Agricultural University, Coimbatore- 641 003.

      • Submitted|

      • First Online |

      • doi

      Cite article:- Sudhalakshmi C., Velu V., Thiyagarajan T.M. (2025). LEAF COLOUR CHART FOR NITROGEN MANAGEMENT IN RICE– A REVIEW. Agricultural Reviews. 29(4): 306 - 310. doi: .

      ABSTRACT

      Leaf Color Chart (LCC) has substituted chlorophyll meter (SPAD) to estimate the leaf nitrogen (N) status of rice (Oryza sativa L.) and for timely N fertilizer application. It is an inexpensive, simple and easy to use tool with six shades of greenness from light yellow to dark green. LCC readings are taken once in a week, starting from 14 days after transplanting for transplanted rice and 21 days after seeding for wet seeded rice. Readings are taken once every 7 – 20 days until the first flowering. The critical value is 3 for varieties with light green foliage and 4 for all other varieties and hybrids. If the critical value of the leaf falls below the threshold value, 35 kg N/ha during kar/kuruvai/navarai and 30 kg N/ha during samba/thaladi/pishanam season need to be applied. As nitrogen supply matches with the crop demand, there is considerable yield increase under LCC - N management and because of the optimum N supply, there is saving of nitrogenous fertilizers to the tune of 20 – 40 kg/ha

      KEYWORDS

        REFERENCES

        1. Balasubramanian, V. et al. (1999). Nutr. Cycl. Agroecosyst. 53 : 59 -69.
        2. Cassman, K.G. et al. (1994). In: Hybrid Rice Technology; New Developments and Future Prospects. IRRI, Los Banos,
        3. Philippines, pp. 81-96.
        4. Christopher Lourduraj, A. and Velu, V. (2001). In : Proceedings of the Rice Scientists’ Meet – 2001, TNAU, Coimbatore.
        5. Furuya, S. (1987). Jap. Agric. Res. Quar. 20: 147 -153.
        6. IRRI. (1996). IRRI Annual Report. Int. Rice Res. Inst., P.O Box. 933, Manila 12099, Philippines.
        7. Kropff, M.J. et al. (1993). Plant Soil. 155/ 156: 391 -394.
        8. Meelu, O.P. and Gupta, R.K. (1980). Int. Rice Res. Newsl. 5: 20–21
        9. Peng, S. and Cassman, K.G. (1998). Agron. J. 90:178–185
        10. Peng, S. et al. (1995). Crop Sci. 35 : 1627- 1630.
        11. Ramasamy, M. and Anitha, N.S. (2001). In: Rice Scientists’ Meet Report – 2001, Tamil Nadu Agricultural University,
        12. Coimbatore.
        13. Shiga, H. et al. (1977). In: Proc. Int. Seminar on Soil Environ. and Fertil. Manage. Intensive Agric., 20 Aug.1977,
        14. Tokyo, Japan. pp: 223- 229.
        15. Singh, Bijay et al. (2002). Agron. J. 94:821–829
        16. Takabe, M. and Yoneyama, T. (1989). JARQ. 23 : 86 -93.
        17. Tanno, F. (1988). Japan J. Soil Sci. and Plant Nutr. 59 : 423 – 428.
        18. Tanno, F. et al. (1982). Bull. Fukhushima Pref. Agr. Exp. Stat. 21: 61 -72.
        19. Wells, B.R. and Turner, F.T. (1984). In: Rd. Hacuk (Eds.) American Society of Agronomy, Madison, Wisconsin, USA. pp: 349 – 362.
        20. Velu, V. et al. (2001). In : Rice Scientists’ Meet Report – 2001, TNAU, Coimbatore.
        21. Thiyagarajan, T.M. et al. (2000). IRRN. 25 (1) : 30 -32.
        22. Thiyagarajan, T.M. et al. (2001). In: Rice Scientists’ Meet Report - 2001, Tamil Nadu Agricultural University, Coimbatore
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