Simple terracing in 1 ft steps, what material?

I have to deal with a hillside that has a 2:3 slope (if I'm saying that 
right, slope goes down a two feet for every three out). The main goal 
here is to forestall erosion, secondary to help plantings take root. 
Hillside is about 70' wide, and it drops 10'. It has a mild contour to 
it, so straight terracing wouldn't be ideal. Anyone have ideas re a good 
material for the 'retaining walls'. I'm not really aiming at a full 
strength retaining wall system which would probably cost a fortune to 
install. More hoping that some easy going terracing will do enough. 
Like, steel pegs knocked in two feet deep, with 1 foot up, and some 
barrier material as the wall...what that would be I don't know, but have 
wondered if there is some recycled plastic 3/4" x 1' king sized 
benderboard material out there. Or are there 'systems' for this type of 
situation? I'm not eager to use the cement blocks that are common, too 
much weight to haul, it'd be a lot of block. There is no snow or 
freezing where I live.