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Chlorophyll meter predicts nitrogen status of tall fescue
Journal of Plant Nutrition, 1996Abstract The nitrogen (N) status of a crop can be used to predict yield and supplemental N fertilizer requirements, and rapid techniques for evaluating the N status of crops are needed. A study was conducted to determine the feasibility of using a hand held chlorophyll meter (SPAD 502, Minolta Co.
R. V. Kantety +3 more
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EVALUATION OF CHLOROPHYLL METER TO ASSESS NITROGEN STATUS OF COCKSFOOT SWARD
Journal of Plant Nutrition, 2002The sward nitrogen index (NNI), computed from nitrogen (N) content and standing herbage mass, is a sound approach to assess the N sward status for tactical adjustment of N fertilizer. However, chlorophyll meter (SPAD) readings might simplify the procedure, avoiding having to weigh and analyze the herbage.
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Assessing the nitrogen requirements of rice crops with a chlorophyll meter
Australian Journal of Experimental Agriculture, 1994Soil and plant analyses to estimate nitrogen (N) fertiliser requirements of rice plants continues to be a research priority because of the major influence of N fertiliser on rice yield, production economics, and concerns regarding excess N in our soil, water, and air.
FT Turner, MF Jund
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Monitoring nitrogen status of corn with a portable chlorophyll meter
Communications in Soil Science and Plant Analysis, 1996Abstract Portable chlorophyll meters have been reported to provide a new tool to rapidly assess the nitrogen (N) status of growing crops, but need further validation. This study was conducted on growers’ fields to determine if the portable chlorophyll meter is an accurate tool to monitor the N status of irrigated corn (Zea mays L.), thereby allowing ...
R. M. Waskom +3 more
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SPAD chlorophyll meter reading can be pronouncedly affected by chloroplast movement
Photosynthesis Research, 2010Non-destructive assessment of chlorophyll content has recently been widely done by chlorophyll meters based on measurement of leaf transmittance (e.g. the SPAD-502 chlorophyll meter measures the leaf transmittance at 650 and 940 nm). However, the leaf transmittance depends not only on the content of chlorophylls but also on their distribution in leaves.
Jan, Nauš +3 more
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Chlorophyll meter based precision nitrogen management in spring maize
Journal of Plant Nutrition, 2023Jagdeep Singh
exaly