We're located in NZ... in the South Island on the Canterbury Plains; a good 40cm of top soil then silt loam and rock under that (historically an old river bed). The land has been intensively grazed before we bought it; now we have 10 acres that we are not putting animals on in the foreseeable future. We want to regenerate the soil and ecology as much as possible... aside from tree planting which we've already done - what would everyone's advice be on dealing with the remaining bare land that's fenced into 4 paddocks? Let it fallow? Spring is in the air and the neighbours say that we should get grass up to knee height, it was sown in rye a couple of years back. Any advice / suggestions would be awesome.