So I'm still wondering if humans could survive with dinosaurs. There are some big problems I see. Here they are:
This isn't so much a problem with planting and the plants growing as it is with big herbivorous dinosaurs eating the plants including the fruits. This would be a major problem, The tallest herbivorous dinosaur is Sauroposeidon at 18.5 meters tall. This means that to guarantee that food is produced, the fence surrounding the civilization would have to be just a little taller than Sauroposeidon is.
But more likely is for ceratopsians such as Triceratops and stegosaurs such as Stegosaurus to eat all the plants including tree saplings to the point that no food is produced than for a very tall sauropod to eat the leaves of a tall tree.
This is possibly the biggest problem of all of them. If humans are just starting a civilization on a planet that is full of dinosaurs, it is inevitable that big carnivores like T rex would find them with their great sense of smell and vision. But humans don't weigh much compared to a T rex and probably would not be a threat or prey to T rex. Height of a T rex would be up to 5 times taller than that of a human. A much more likely predator is something like Utahraptor, about the height of a human and about 10 times as heavy. That or possibly a juvenile T rex.
I honestly don't know if dinosaurs could be domesticated for protection or to help the humans hunt. But I do know that the big dinosaurs(as in bigger than a human in height) that could possibly be domesticated, would pretty much all be herbivores.
So assuming some technology is given to help humans and the plants they grow not get overheated, could a human civilization survive on a planet full of dinosaurs given that there are all these major problems like predation and herbivores eating all the plants that would be producing food for humans?
Okay, quite a few people have asked what technological level the humans are at. Well these humans were on a generation ship before so I would assume space age level. Someone has also asked for which dinosaurs there are on this planet. I don't think I can specify every single dinosaur but I do know that on this planet are dinosaurs from the Triassic, Jurassic, and Cretaceous that aliens have transported from Earth to this planet that they have survived on to the modern day.