The Weight of the Living World, from Pitt T. Maner III
There is an interesting ratio of plants: bacteria: fungi: animals in units of GT C (1015 g of carbon) of 450:70:12:2.
With a total biomass estimated at 550 GT C or 550 quadrillion (American system) g.
Roughly 605 billion tons with a natural world emphasis on organisms good at photosynthesis and recycling.
From "the Biomass Distribution of Earth":
"The composition of the biosphere is a fundamental question in biology, yet a global quantitative account of the biomass of each taxon is still lacking. We assemble a census of the biomass of all kingdoms of life. This analysis provides a holistic view of the composition of the biosphere and allows us to observe broad patterns over taxonomic categories, geographic locations, and trophic modes."