Organic Bio-fertilizers. BioControl Inoculants provides a range of Bio-fertilizers, making nutrients available for plant uptake in a variety of ways. AZO-N: Provides a suspension of free-living, nitrogen fixing bacteria that make atmospheric nitrogen available to grass species such as maize, sorghum, sugarcane, wheat and pastures. AZO-N PLUS: Apart from making atmospheric nitrogen available to grass species, AZO-N PLUS also contributes additional plant hormonal stimulus (IAA), thereby stimulating root growth. AZO-N SALT: For SALINE soils: Free-living bacteria that make atmospheric nitrogen available to grass species such as maize, sorghum, sugarcane, wheat and pastures. NAT-P: A concentrated suspension of bacteria that will make phosphates available for uptake from phosphate retentive soils. As an added bonus, it will suppress a range of harmful fungi in the rhizosphere.