Guido Sarmiento-Sarmiento, Mauricio Chaca-Taipe, Luis Lipa-Mamani, María Antonieta Cahuana-Parada. Humic Acids and Potassium from Organic Sources on the Yield and Economic Profitability of Paprika Cultivation in an Arid Zone. Annals of RSCB 2021, 2707-2718.