The use of humic substances in agriculture has increased recent years, and leonardite been an important raw material the manufacture commercial products rich fulvic acids. Leonardite-based have used to improve soil properties help plants cope with abiotic biotic stresses. In this study, effects two leonardites organic compost, addition a control treatment, were assessed for pot-grown olive over...

The complexity of humic substances and their remarkable properties have attracted and continue to attract the attention of many investigators, bringing over the years new knowledge on their structure, physicochemical and biological properties pointing to the use of these interesting natural compounds in many practical applications. The numerous investigations produced, up to now, controversial ...

Abstract Background and aims Biostimulants of natural origin represent a growing ecological strategy to increase crops productivity, especially when applied in combination with microbial bioeffectors. We studied the effect biostimulants such as Potassium Humates (KH) from Leonardite Compost Tea (CT) green compost on both productivity nutritional status lettuce plants, well primary secondary met...