A simplified explanation could be that behöver refers to a need that comes from the person or situation in question, whereas måste comes from outside.
Läraren säger att du behöver studera mera 'The teacher says that you need to study more' – this implies that it would be good for you to study more.
Läraren säger att du måste studera mera 'The teacher says that you must/have to study more' – this implies that the teacher orders you to study more.
In practice it's always hard to distinguish what's really meant with this kind of verb. There's a lot of room for interpretation and a situation can usually be viewed from many angles. But it seems to me that in Swedish, we do sometimes distinguish between these verbs, whereas in English, the distinction has basically been lost. So all of 'need to', 'have to', and 'must' are accepted answers here. (One of them was missing but I've added it now).
I think the expression tends to be used in more abstract texts. https://www.theguardian.com/news/datablog/2013/jan/10/how-much-water-food-production-waste
I assumed the speaker was the performing actor in a live comedy duo, currently doing a gag that involved pulling a great deal of fresh produce out of his shirt pockets. When he realizes that the crowd is completely unimpressed, he frantically whispers to his partner...
does 'tillverka mat' means produce food on farms as a country benefit? I am not sure to get it!
Could be either that, or industrial food production, or both together as in the whole chain from farmer to what we buy in the store.