Aerial Photography to Detect Nitrogen Stress in Corn

摘要: Summary Economic and environmental benefits can result from improved nitrogen (N) management in corn (Zea mays L.) production. This research project was conducted to determine the utility of aerial photographs detect N deficiency a crop canopy caused by natural soil variability variable fertilizer application rates. Chlorophyll meter readings digitized photograph data were compared grain yield stalk nitrate concentrations 60-ha field Central Nebraska. In addition variability, 30.4-m long treatments imposed through center applying at rates 0, 56, 112, 168, 224 kg ha -1 . Grain yield, chlorophyll readings, photographic brightness samples collected. Despite significant effect treatments, did not correlate well with yields. The red component color showed inverse relationship (r 2 = 0.42) yield. Stalk harvest, when photograph, provided better confirmation status than Aerial appear be capable detecting induced as reduced portions that variability.