The phrase "are mostly collected" is correct and usable in written English.
It can be used when discussing the gathering or accumulation of items, data, or information, indicating that the majority of them have been gathered.
Example: "The survey responses are mostly collected from participants in urban areas, providing valuable insights into their preferences."
Alternatives: "are primarily gathered" or "are largely assembled."
The data are mostly collected and we're now trying to make sense of it.
Taxes are mostly collected by the national government, and the money is redistributed to the provinces, where it is spent with little oversight.
Data for Oceania are mostly collected from AQUASTAT and GRanD, except data for Australia, which are collected from the Register of Large Dams maintained by the Australian National Committee on Large Dams.
Only 3 out of 20 samples (15%) showed high F content which are mostly collected from hot springs and one from STP outlet point (Table 1).
Slugs analyzed are mostly collected from the wild and then grown on their food alga in open aquaria in the lab.
Information related to ground state optimized geometry of all types of canonical and nc base pairs, viz., base pair parameters, detailed hydrogen bonding descriptions and interaction energy along with its components as calculated using different QM methods, are mostly collected from the published literature (13 17, 19, 41 45).
The proportion of households visited was much higher in rural areas than in urban areas, where the sample collection kits were mostly collected by the eligible individuals during their routine and opportunistic visits to the health centres or CHs for routine health check-ups for early detection of diabetes, hypertension and helminthiasis and for other medical problems.
Both T. tabaci and F. occidentalis were mostly collected from weeds flowering in spring and summer, when these plants were most abundant.
When PRB was installed at the position of 0.5 and the pH in the PRB was decreased by periodical injection of HAc, 49% of PCP was removed, and 22.9% was recovered as phenol which was mostly collected in catholyte.
The money was mostly collected from small donors, who the campaign is hoping will continue to give in coming months and who represent an increasingly formidable force in presidential fund-raising.
Meanwhile, C. rotundicauda was mostly collected from mangrove area (high content silt-clay) with sediment size less than 63 µm and total organic matter ranging from 0.35% to 27.91%.
