1. Use of a Chlorophyll Meter As a Decision-support Tool for Nitrogen Management in Coffee Fields

Coffee is a crop with high nitrogen (N) demand in Brazil; therefore, improving N use efficiency in coffee plantations can have significant environmental and economic impacts. Decisions regarding N application rates in coffee cultivation are often empirical or based on multiple factors, including expected yield and plant N status as determined by leaf N concentration. Traditionally, leaf N concentration is obtained through laboratory chemical analysis, a process that may take several days and limits... D. Almeida, M. Pereira, A. , V. Giroto, G. Portz