A field study was conducted at Pantnagar, Uttarakhand, during the rainy (kharif) season of
2013 and 2014 using leaf-colour chart (LCC) as a tool to know nitrogen demand in maize
(Zea mays L.) crop and to evaluate and establish LCC threshold value for saving fertilizer N
and achieve higher grain. The LCC-treated plots showed higher increase in grain yield/kg N
applied over fixed time interval of N treatments. Using of LCC score 3.0 with 90 kg N/ha
showed grain-yield equivalent to 120 and 150 kg N/ha applied at fixed time interval and …

Large field to field variability in inherent nitrogen (N) supply restricts efficient fertilizer N use
when broad based blanket recommendations are used in cereals. Field experiments were
conducted for 11 years (2000-2011) to evaluate threshold leaf colour greenness to guide in-
season need based fertilizer N top-dressings in different rice, wheat and maize varieties
grown in wide range of agro-climatic conditions in Punjab. Evaluation of need-based
fertilizer N management strategy using leaf colour chart (LCC) at 461 on-farm experiments in …