Efficiency of critical level and compositional nutrient diagnosis methods to evaluate boron nutritional status in soybean

The efficiency of the boron (B) nutritional status in soybean (Glycine max (L.) Merr.) was evaluated by degree agreement (DA) indicators using different diagnostic methods and prescient analysis (PDA). objective this study to evaluate two interpretation B soybean, that is, compositional nutrient diagnosis (CND) critical level (CL). An experimental trial conducted a randomized block design with five replicates, which foliar application rates 0, 300, 600, 1200, 1800 g ha-1. Another consisted monitoring 140 commercial farms. We sampled leaves determine contents estimate yield both studies. All samples were diagnosed CND CL methods. A reference value literature obtained reduced normal distribution field calibration trial. showed high DA between diagnoses; ratio accuracy for true deficiency low, except method calibration, exhibited an increase positive net yield. ineffective validate higher negative values production (-46 -53 kg ha-1). greater assessing fertilized because 197