I'm stuck with a sentence from GRE test.
Researchers analyzing refuse from one Pueblo community found remains of maize — a Peublo crop — in 44 percent of samples from years when the community flourished, but in only 10 percent of samples from years near the time of depopulation, while the remains of wild plants increased significantly.
In the above passage, I confused the meaning of the bold sentence. It means that remains of maize is 44 percent? Or they found them in 44 percent of samples (they don't know the real percentage of remains)?