The phrase "a drastic increase of" is correct and usable in written English.
It can be used when describing a significant rise in quantity, amount, or degree of something.
Example: "The report indicated a drastic increase of sales in the last quarter."
Alternatives: "a significant rise in" or "a substantial growth in".
A drastic increase of the treated pellets' hydrophobicity was observed.
Finally a drastic increase of mineralization activity of nCF/HAp scaffolds as compared to their nCF counterparts has been proved.
Similarly, for electro-Fenton, a drastic increase of the TOC abatement was achieved upon increasing the air pressure.
The scanning electron microscopy images of Mg2Ni/Ni particles demonstrated a drastic increase of their sizes up to 100 µm upon annealing.
For a pinned triple line, the meniscus becomes thinner and a constant evaporating flow leads to a drastic increase of the liquid velocity inside the meniscus.
Coiled-coil-mediated oriented tethering of epidermal growth factor triggered a drastic increase of the internalization rate of the targeted polyplexes.
In May 2006, the Muleba district authority noticed a drastic increase in number of outpatient and inpatient malaria cases accompanied by increased mortality especially of underfive children.
Many recent studies that relax the assumption of independent evolution of sites have done so at the expense of a drastic increase in the number of substitution parameters.
So he was hardly surprised this week with the release of a report by the Federal Aviation Administration on a drastic increase in instances of lasers aimed at aircraft.
Decreasing the average dimensions of GO sheets from ∼800 to 150 nm significantly reduced the size of NBs from ∼180 to 40 nm while caused a drastic increase (∼two orders of magnitude) in their concentrations.
A Russian government official told the Guardian that Russian air force flights, consisting mostly of training sorties in international airspace, needed to be seen within the context of "a drastic increase in the activity of foreign reconnaissance and combat planes near Russian borders".
