The phrase "a significant field" is correct and usable in written English.
It can be used to describe an area of study, research, or work that has considerable importance or impact.
Example: "Environmental science is a significant field that addresses critical issues related to climate change and sustainability."
Alternatives: "an important area" or "a major discipline".
Since his essay was published, the study of procrastination has become a significant field in academia, with philosophers, psychologists, and economists all weighing in.
It developed into a significant field of study during the 1960s owing largely to a growing concern over the deteriorating environment.
(One passage quoted on the R.N.C. Web site said, "So pervasive are the ties among Reid, members of his family and Nevada's leading industries and institutions that it's difficult to find a significant field in which such a relationship does not exist").
Researches/academicians and practitioners have come together to view the diffusion of product innovation as a significant field of sociology.
Decision-making in practice of industrial enterprises forms a significant field for mathematical modeling of behavior in complex market environment.
Nanotechnology is a significant field of modern research dealing with design, synthesis, and utilization of particles structure ranging from approximately 1 100 nm (Shameli et al. 2012).
No significant interactions between sample and field effects were detected but there was a strong significant field effect for each morphological trait: flowering time (F2,1500 = 131.9, P<0.001), plant height (F2,1500 = 174.3, P<0.001) and spike length (F2,1500 = 5.2, P≤0.006).
This led to Lall opening up a related, highly significant field of work in the area of developing world multinationals, and of developing countries as the exporters of technology.
Categorical study of duality theorems is still a very active and significant field, and is largely inspired by Stone's result.
Calculations of TBM-produced error fields also show that TBM produces a significant error field at q = 2 surface exceeding the ITER design requirement.
In Gabon, the government has surprised the oil industry by withdrawing a permit for a significant oil field from a subsidiary of another Chinese state-owned company, Sinopec, turning it over to a newly created national oil company.
