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volume 28 issue 1 (march 2008) : 71 - 72
PERFORMANCE OF CROP MODELS OF RICE-WHEAT CROPPING SYSTEM AS MEASURED BY RELATIVE CHLOROPHYLL CONTENT IN WHEAT
1Department of Agronomy,
G.B. Pant University of Agriculture & Technology, Pantnagar – 263 145, India
ABSTRACT
An experiment was laid out in randomized block design during kharif 2002-2003, to assess the relation between wheat yields and relative chlorophyll contents in different crop models due to integrated effect of different nitrogen levels. Four models viz., recommended dose of NPK and Zn (150, 60,40 and 25 kg/ hectare) (A); N 180 kg/ hectare along with green manure of Sesbania and recommended dose of PK and Zn (B); 10% extra of NPK and Zn (C); recommended dose of NPK and Zn with direct seeding of rice followed by zero tillage wheat (D), were taken into consideration as four treatments for their comparison. SPAD measurement was taken at flag leaf stage, which indicated the magnitude of relative chlorophyll content of the crop. Highest SPAD reading was recorded in green manure model (B), followed by 10% extra (C), zero tillage (D) and traditional model (A). This clearly correlates the yield attributing characters and yields up to a great extent. This may be because, higher nitrogen levels resulted in higher nitrogen obtained, which ultimately results into increased protein synthesis, cell division and cell enlargement, which is expressed as morphological increase in all yield attributing characters.
KEYWORDS
REFERENCES
- Panda, S.S. et al. (1988). Indian J. Agron., 33: 364-367.
- Sharma, J.S. and Dhillon, S.S. (1993). Indian J. Agron., 38: 111-112
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This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Published In
Agricultural Science Digest