Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India

By Bijay S Singh, Y. Singh, J. Ladha, Kevin F. Bronson, V. Balasubramanian, Jagdeep Singh, C. S. Khind. 2002

309 citations recorded by the source corpus.

View Paper: https://www.semanticscholar.org/paper/7fa4e138545a4eb776821558d1be2a15a63bac58

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Citations in the corpus

FIELD EVALUATION OF THE RELATIONSHIP BETWEEN CHLOROPHYLL CONTENT IN BASIL LEAVES AND A PORTABLE CHLOROPHYLL METER (SPAD-502) READINGS (2010, background): “…and indirect estimation of the nutrient because much of nitrogen is incorporated in chlorophyll (Filella et al., 1995; Hoel and Solhaug, 1998; Samdur et al., 2000; Moran et al., 2000; Hussain et al., 2000; Singh et al., 2002; Giunta et al., 2002; Wang et al., 2004; van den Berg and Perkins, 2004).”
Nitrogen Utilization Efficiency: Relationships with Grain Yield, Grain Protein, and Yield-Related Traits in Rice (2006, background): “There are studies that recommend how to minimize N losses and improve N uptake efficiency in the lowland rice environment (Freney, 1997; Cassman et al., 1998; Raun and Johnson, 1999; Bautista et al., 2001; Singh et al., 2002).”
Productivity and sustainability of the rice-wheat cropping system in the indo-gangetic plains of the Indian subcontinent: Problems, opportunities, and strategies (2012, background): “In the Indian Punjab, a value of 37.5 was found as the critical SPAD value for rice grown sequentially with wheat, whereas, in wheat, yield increased with a topdressing of 30 kg N ha 1 when the SPAD reading at maximum tillering was less than 44 (Singh et al., 2002).”
Establishment of threshold leaf colour greenness for need-based fertilizer nitrogen management in irrigated wheat (Triticum aestivum L.) using leaf colour chart (2012, background): “Bijay-Singh et al. (2002) reported wheat response to need based fertilizer N application at MT stage.”
Diagnostic Tests for Site‐Specific Nitrogen Recommendations for Winter Wheat (2004, result): “N contents (180 cm) with critical fied in our study is slightly higher than ranges (42 totest levels of 120 kg ha 1 for winter wheat and 240 kg 46) reported in earlier studies (Follett et al., 1992; Foxha 1 for irrigated corn in Nebraska. et al., 1994; Singh et al., 2002).”
On-farm evaluation of leaf color chart for need-based nitrogen management in irrigated transplanted rice in northwestern India (2007, methodology): “Although shade 4 on the LCC has been used in Asia (Bijay-Singh et al. 2002; Balasubramanian et al. 2003; Shukla et al. 2004; Alam et al. 2005) as the critical value for deciding N fertilizer application on the basis of the color of the first fully opened leaf of the rice plant from the top,…”
Normalized Difference Vegetation Index and Chlorophyll Content for Precision Nitrogen Management in Durum Wheat Cultivars under Semi-Arid Conditions (2021, methodology): “The SPAD chlorophyll meter was largely used in rice and wheat to identify crop N status [33,34].”
Glyphosate reduces shoot concentrations of mineral nutrients in glyphosate-resistant soybeans (2010, background): “SPAD-502 meter) on the terminal leaflet of the diagnostic leaf ( Singh et al. 2002; Richardson et al. 2002; Pinkard et al. 2006).”
Strategies for overcoming low agronomic nitrogen use efficiency in irrigated rice systems in China (2006, background): “Evaluation of RTNM in Asia has generally shown that the same rice yield could be achieved with about 20–30% less N fertilizer applied, but increases in yield were seldom (Peng et al., 1996; Balasubramanian et al., 1999, 2000; Hussain et al., 2000; Singh et al., 2002).”
Relative performance of neem (Azadirachta indica) coated urea vis-à-vis ordinary urea applied to rice on the basis of soil test or following need based nitrogen management using leaf colour chart (2010, background): “…assess foliar N status and adjust top dressing accordingly as it is proved that the current recommendation of three split application at specified growth stages is not adequate to synchronize N supply with crop N demand (Bijay-Singh et al. 2002; Shukla et al. 2004; Alam et al. 2005, 2006).”