CHLOROPHYLL METER: A TOOL FOR ASSESSING DYNAMIC NITROGEN SUPPLY IN POTATO CROP UNDER ORGANIC VIS-À-VIS INORGANIC NUTRIENT MANAGEMENT OPTIONS


224 / 205

Authors

  • Arvind K. Shukla
  • M. A Khan
  • N C Upadhayay
  • B. P Singh
  • S. S Lal
  • S K Pandey

Abstract

In order to optimize tuber yield in organic potato production systems, knowledge of crop growth in relation to N limitation is necessary. The SPAD Chlorophyll meter reading appears promising for rapid, on farm analysis of crop nitrogen status. Chlorophyll meter readings (using a Minolta SPAD-502 chlorophyll meter) and leaf N content were recorded during the growing season (from 28 to 70 DAS at 1012 days interval) in existing experiments to assess the N status of potato crop. Highly significant linear and quadratic trends were obtained for the regression of leaf N content (R2 = 0.59 to 0.83) and tuber yields (R2 = 0.43 to 0.65) and chlorophyll meter readings. SPAD readings decreased as plants aged.

Downloads

Download data is not yet available.

Author Biographies

  • Arvind K. Shukla
    Project Directorate of Cropping System Research, Modipuram-250 110, UP, India
  • B. P Singh
    Central Potato Research Institute Campus, Modipuram-250110, UP, India
  • S K Pandey
    Central Potato Research Institute, Shimla-171001, HP, India

Downloads

Issue

Vol. 34 No. 1 - 2 (2007)

Section

Articles

License

The copyright of the articles published in Potato Journal is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

Shukla, A. K., Khan, M. A., Upadhayay, N. C., Singh, B. P., Lal, S. S., & Pandey, S. K. (2013). CHLOROPHYLL METER: A TOOL FOR ASSESSING DYNAMIC NITROGEN SUPPLY IN POTATO CROP UNDER ORGANIC VIS-À-VIS INORGANIC NUTRIENT MANAGEMENT OPTIONS. Potato Journal, 34(1 - 2). https://epubs.icar.org.in/index.php/PotatoJ/article/view/33097