<p>My information might be out of date, but one of my roommates was a LArch major (many years ago). </p>
<p>As far as I know,
a) You do need to submit a portfolio. Here’s a link describing the requirements: <a href=“http://www.landscape.cornell.edu/portfolio.html[/url]”>http://www.landscape.cornell.edu/portfolio.html</a>
b) Yes, it was a regular 4-year bachelor’s degree program.
c) No, it wasn’t anywhere near as time-consuming as normal architecture. (Being a Cornell program, it was time-consuming enough, but no worse than a lab science major.)</p>