Suitability of relative chlorophyll content index to assess maize nitrogen nutrition status
2005
Machul, M. | Jadczyszyn, T. (Instytut Uprawy Nawozenia i Gleboznawstwa - Panstwowy Instytut Badawczy, Pulawy (Poland))
The results of the investigation on the use of SPAD test for assessment of maize nitrogen nutrition status are presented in the paper. Two systems of nitrogen fertilizers application: broadcasting and localized placement and five nitrogen fertilization levels - 25, 55, 85, 115 and 145 kg/ha were tested. SPAD readings, dry matter yield and nitrogen content in dry matter of maize were evaluated in 7-10 day intervals from 6th expanded leaf to tassel emergence. Nitrogen critical content in dry matter and nitrogen nutrition index were calculated
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