"proportional contribution" is a correct and usable phrase in written English.
It can be used to describe the amount or share of something that is contributed in relation to other factors or elements. Example: The government's budget proposal outlines a plan for each department's proportional contribution towards reducing the national debt.
PCBs 118, 138/158 (co-eluting congeners), 153, and 180 were selected for further analysis on the basis of their proportional contribution to the ∑PCB concentration and having a large proportion of the samples with detectable levels.
The proportional contribution of an individual to the rate of increase of the iteroparous population obviously diminishes as the number of its living progeny increases.
It shows, for example, the proportional contribution to the total rate density at the target magnitude of 5.0 that originates from precursors of magnitude 3.0 is about 0.004, and the proportional contribution from precursors of magnitude 4.0 is about 0.1.
Figure 4 The proportional contribution of cattle, sheep (black), and goats (grey) to the total livestock biomass expressed in TLU.
Table 3 shows the proportional contribution of female flowers, immature (undamaged) fruits and predated structures to potential seed production.
The CAD model is used to determine the proportional contribution of each homogeneous material to the overall reflectance.
The CTE of composites in a-axis agree with rule of mixture estimation representing proportional contribution of the two phases.
One of the classical problems was the so-called imputation problem, of calculating the proportional contribution of production goods in joint production.
Figure 6(b) shows the overall proportional contribution to the total rate density at a given target magnitude from precursors in the same magnitude range.
The ruminal outflow of microbial N, the proportional contribution of Lys and Met to total AA delivered to the duodenum, and milk yield were unaffected by treatments.
Soviet agriculture would receive a share investment of 34 percent, a share much larger than its proportional contribution to the Soviet economy, as it accounted for only 3 percent of Soviet GDP.
