02531naa a2200325 a 450000100080000000500110000800800410001902400560006010000250011624501500014126000090029152015240030065000220182465000200184665000150186665000090188165000170189065000160190765000230192365000110194665300240195765300220198165300190200370000190202270000200204170000170206170000230207870000170210177300870211821426702022-05-06       2022    bl uuuu     u00u1 u    #d7 ahttp://doi.org/10.4067/S0718-583920220002003092DOI1 aTRASPADINI, E. I. F.  aEfficiency of critical level and compositional nutrient diagnosis methods to evaluate boron nutritional status in soybean.h[electronic resource]  c2022  aThe efficiency of the boron (B) nutritional status in soybean (Glycine max (L.) Merr.) was evaluated by degree of agreement (DA) indicators using different diagnostic methods and by prescient diagnostic analysis (PDA). The objective of this study was to evaluate the efficiency of two interpretation methods of B nutritional status in soybean, that is, compositional nutrient diagnosis (CND) and critical level (CL). An experimental trial was conducted using a randomized block design with five replicates, which evaluated foliar B application rates of 0, 300, 600, 1200, and 1800 g ha-1 . Another study consisted of monitoring 140 commercial farms. We sampled leaves to determine nutrient contents and estimate yield in both studies. All samples were diagnosed by CND and CL methods. A reference value in the literature was obtained by the reduced normal distribution and CL methods by field calibration in the experimental trial. All the methods showed a high DA between diagnoses; the efficiency ratio and accuracy for true deficiency were both low, except for the CL method by field calibration, which exhibited an increase in positive net yield. The DA was ineffective to validate the efficiency of nutritional diagnoses; methods with a higher DA showed negative values for the net increase in production (-46 to -53 kg ha -1). The CL method by field calibration showed greater efficiency in assessing the nutritional status of B in foliar fertilized soybean because the net increase in production was 197 kg ha-1.  aBoron fertilizers  aPlant nutrition  aAdubação  aBoro  aFertilizante  aGlycine Max  aNutrição Vegetal  aPlanta  aDiagnóstico foliar  aFoliar fertilizer  aLeaf diagnosis1 aWADT, P. G. S.1 aPRADO, R. de M.1 aROQUE, C. G.1 aWASSOLOWSKI, C. R.1 aPEREZ, D. V.  tChilean Journal of Agricultural Researchgv. 82, n. 2, p. 309-319, Apr./Jun. 2022.