What the CropBioLife Peer-Reviewed Studies Actually Show

Changing anything in an established spray program can be a significant decision. Programs get built over years, often across generations, and they carry a full season's outcome with them. As knowledge and technology evolve it makes sense that the farms’ program can and should adapt. A product asking to be added in should be proven to deliver on claims, which is why CropBioLife has spent more than 18 years building its evidence base.

Some of that work has been through peer review, with controlled trials in Spain and field trials in Australia, USA, NZ and India. However, reading through research takes time, so we thought we would save you some. In this article, we highlight what the studies measured, what the findings were, and where the evidence is still developing. 

The mechanism: It all starts with the leaf

The clearest results come from two studies out of CEBAS-CSIC in Spain, which ran controlled hydroponic trials on tomato. Growing without soil removes a large source of variability, so the effects observed can be attributed to the treatment rather than to soil chemistry, moisture variation or microbial activity.

Under normal growing conditions, treated crops developed significantly more stomata than untreated crops, and more than twice as many were open at any given time. That second figure is the more interesting one, because stomatal density is fixed once a leaf develops while aperture responds continuously to conditions, and it is aperture that governs how much carbon dioxide is available to the crop at any given moment.

The rest of the measurements follow from that. Internal carbon dioxide concentration rose, net photosynthesis increased, and chlorophyll content and photosystem II efficiency both improved. Leaf cells were 40 to 60 per cent larger, and shoot and root dry weight increased measurably, which is where a change in leaf function turns into additional plant material.

Reading the genes, and reading them carefully

A separate RNA-sequencing study from the same lab measured gene expression rather than crop performance. Around 1,300 genes shifted expression after foliar application, with upregulated pathways pointing toward increased metabolism, mineral transport and water uptake, along with higher internal flavonoid production.

That last finding is notable on its own terms, since it indicates the crop responding by producing more of the same class of compound CropBioLife is made from.

The distinction worth drawing is what this study unveiled. Through prior research we have known CropBioLife improves nutrient efficiency and photosynthesis. What we learned here was how it did it. Flavonoids are managers of nutrient demand. For example, flavonoids sit on the stomata guard cells contributing to their opening and closing based on demand for glucose. That demand is driven by nutrient availability which again involves flavonoids signalling to soil biology as part of exudates. It is somewhat of a chicken and egg scenario. What comes first more photosynthesis or more available nutrients. The answer is that the process is a feedback loop driven by metabolic demand. Plant metabolism is the sum total of all physical and chemical processes and enzyme-driven reactions that occur within a plant cell.

Putting it under pressure

Results under favourable conditions raise an obvious question, because most seasons are not favourable. A separate CEBAS study tested the product on tomato under salinity, which works against a crop on two fronts at once, limiting water availability while accumulating ions that interfere with normal cell function.

Treated crops held chlorophyll significantly higher than untreated stressed crops. Calcium, which salinity normally strips from leaf tissue, was restored close to normal levels, which matters because a crop losing calcium under salt stress is losing structural integrity at the cell level. Biomass gains were not significant in this trial, which the researchers attributed to application timing and dose relative to when the stress was applied.

Taking it out of the lab

Controlled conditions establish what a treatment does when other variables are held still. They cannot establish what it does across a season with real weather, real soil and real variability, which is the only version of the question that carries commercial weight.

A 2025 field trial on tomato in Maharashtra, India, tested four application rates against an untreated control across a full growing season. At the best-performing rate, yield came in 16 per cent higher, at 57.8 tonnes per hectare against 49.8. fruit brix rose about 21 per cent, with earlier flowering and heavier fruit recorded alongside it. 

The brix result is a direct indicator of increased photosynthesis. When comparing to the results from the Spanish University study it can be concluded that the metabolism demand for nutrients has resulted in more efficient nutrient assimilation which in turn results in what we all want, improved yield. When considering adding a new input into any program the key is that it delivers more than it costs to implement. This is evidence of how CropBioLife delivers return on investment.

Where the evidence currently stands

Across these studies, the findings describe a mechanism and one field outcome consistent with it. In controlled conditions, treated crops carried more open stomata, higher photosynthesis and greater dry weight. The gene expression data points toward increased metabolism, mineral and water transport. In the field, the best-performing rate produced 16 per cent more yield and about 21 per cent higher Brix across a full growing season.

What the published work does not cover is the range of crops, climates and application timings a grower would need to see before drawing conclusions for their own operation. This is an evidence base still being added to, and the studies above are what it currently supports.