• Harjinder Singh

Nitrogen is most limiting nutrient in crop production particularly in irrigated cereal-based cropping systems. Nitrogen have very important role in plant metabolism. It is essential constituent of protein, chlorophyll and other physiological processes. Now a day, we clearly know that our population increasing day by day, so food consumption is also increasing. To fulfill the demand of food, we need to produce more food. During 2015-16, total N consumption of India was 17.6mt. Fertilizers was applied as a blanket recommendation, therefore nitrogen losses occurs through depletion of weed, fixation, leaching, volatilization and denitrification etc. Beside these quality is also affected due to higher doses. So, there is need to synchronize the supply of nitrogen and demand. Under this situation precision nitrogen management is one of the best method. There are various methods of nitrogen application through real time viz., leaf color chart, soil plant analysis development meter or chlorophyll meter, GreenSeeker. GreenSeeker is an integrated optical sensor based with variable rate application and mapping system which measure crop’s nitrogen requirements. The sensors uses light emitting diodes (LED) to generate red light (660 nm) and near infrared light (780 nm). Red light is absorbed by plant chlorophyll as an energy source during photosynthesis. Healthy plants absorb more red light and reflects larger amounts of near infrared light NIR. The biomass produced per day as estimated through NDVI measurement using optical sensor is a reliable predictor of yield potential. GreenSeeker helps to produce the expected yield than the traditional method for application of nitrogen. It helps to reduced pollution and also helps to increase nitrogen use efficiency NUE.

Green Seeker, Nitrogen use efficiency, NDVI.

"Precision Nitrogen Management Through GreenSeeker", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 8, page no.433-436, August-2017, Available :http://www.jetir.org/papers/JETIR1708067.pdf

"Precision Nitrogen Management Through GreenSeeker", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 8, page no. pp433-436, August-2017, Available at : http://www.jetir.org/papers/JETIR1708067.pdf