Are these sentences gramatically correct

[sergtab]

Please tell me, are these sentences gramatically correct? Thank you!
The study revealed that oversaturated soils have more quantity of nematodes comparing with dry soils. Also, these soils could stimulate development of fungi and bacteria. As a result, quantity of fungivores and bacterivores nematodes in these samples more greater than average.

[bhaisahab]

The study revealed that oversaturated soils have a greater quantity of nematodes when compared with dry soils. Also, these oversaturated soils could stimulate development of fungi and bacteria.
As a result, quantity of fungivores and bacterivores nematodes in these samples more greater than average. This part doesn't make any sense.

[sergtab]

Quantities of fungivores and bacterivores nematodes in these samples was greater than the average.
Please tell me, is this sentence correct? Thank you!

[bhaisahab]

Quantities of fungivore and bacterivore nematodes in these samples were greater than average.