Reduced soil fertility is one of the most vital constraints on improved agricultural production. Chemical fertilizers are used to improve crop production, but intensive inorganic fertilizer use/abuse has led to severe reduction in soil health and increased environmental pollution. Hence, “Conventional Bioregulators” could be an alternative tool for chemical fertilizer, which solves many issues including soil degradation and environmental pollution. These bioregulators are derived from biological materials and play a major role in increasing the heterotrophic bacterial biomass, which in turn improves soil structure, fertility and enhances crop growth. The organic carbon content of these conventional bioregulators can be equal or greater of importance than their nitrogen and phosphorus content. This review article discusses the effects, preparations and futuristic application of conventional bioregulators as a soil amendment.

Keywords: Conventional bioregulators, Fertilizers, Bacterial biomass