Hi Dan,
The scope of the project opportunity in the brief is specific to the reduction/removal of overgrown grass. Certainly, weeds in crop production are also a common problem but it’s up to your team if you want to expand your scope of work.
Unfortunately, I can’t find information that pinpoints the type of grass species, however, I found this 2023 study: SURVEY ON SUSTAINABLE AGRICULTURAL PRODUCTIONS IN MONDULKIRI mentions preventing the growth of grass and the use of non-chemical fertilizers. One way to frame the problem is also to explore what could be safely used around the commonly grown crops in Mondulkiri province.
I hope this helps!
Regards,
Jean