The term 'ONE STUDYING BIOFERTILIZERS' can be summarized as an 'AGGIE', which is a five-letter word for someone who studies biofertilizers. An AGGIE is a person who specializes in the study of biofertilizers, which are organic materials that are used to increase soil fertility and improve crop yields. Biofertilizers are becoming increasingly popular due to their ability to reduce the need for chemical fertilizers, which can have negative environmental impacts.