"varying contributions" is correct and usable in written English.
You can use it when you want to talk about different types of contributions that are being made and the differences between them. For example you could say, "The group made varying contributions to the project, ranging from financial donations to voluntary work."
Horn expression in Onthophagus beetles varies between species, populations, sexes, and alternative morphs within sexes, with varying contributions of environmental and genetic factors on each of these levels.
Other tiers require varying contributions, dropping down to the lowest, $2,300.
The varying contributions of full members to ICC events to be recognised through 'contribution costs'.
Together, these results indicate important but varying contributions of the four Fe-S ligand cysteines to Pri2 function and mitotic viability.
The distributions of the varying contributions to the HF for the entire tumour volume were calculated and displayed as histograms with 1000 bins for each analysis.
Furthermore, it allows delineating varying contributions of different masses of water moving through the system under different flow conditions (e.g. Massei et al. 2003; Birk et al. 2004; Baena et al. 2009).
This phenomenon has led to a varying contribution of carbon emissions that differs at the regional level and at the level of the means of transport, but has the same environmental impact regardless of the source and location of emissions.
Chronological analysis shows individual fields may have a varying contribution to the areal average sensible heat flux on short (weekly) time scales due to phenological development and changing soil moisture conditions.
Finally, we found a positive association between N2 sleep and insulin sensitivity, with varying contribution from degree of obesity.
This conclusion was further substantiated by the varying contribution of the identified QTL regions to the genotypic variance.
Currently, the relationship between metabolic acidosis and clinical outcome remains uncertain, but it appears that a difference in mortality may depend on the varying contribution of causative anions.
