I don't think you can. Loans on raw land are very difficult to get. Besides, what would YOU do with it? Raw land drains money--there are taxes, sometimes special assessments, sometimes upkeep costs. And it brings in no money. So, let's say you do manage to get a 100% loan at, let's say, 10% interest. You'd be paying about $6,000 a year--maybe more, depending on taxes--which works out to $500 a month. Can you afford to pay $500 a month indefinitely? Probably not, if you need a 100% loan.
One option: If the land owner owns the land free and clear, ask for owner financing. That won't work if he needs cash right away. But if he can wait, you'd pay him, just like you'd pay a bank. And with owner financing, you can structure the note any way the two of you agree. For instance, you might structure it as interest only for the first year or two. Or structure it as a balloon note. Both would keep your initial payments low.
Still, the question is: What is your exit strategy? What do you plan on doing with the land? Unless it's something that'll generate enough revenue to either keep holding it or that'll result in a larger profit in the near term, it doesn't make financial sense to buy.