@inbook{inbookb04d0776,
title   = {Agroclimatic mapping of maize crop based on soil physical properties},
author = {Dourado Neto, Durval and Sparovek, Gerd and Reichardt, Klaus and Timm, L. C. and Nielsen, D. R.},
year = {2004},
journal   = {Invited presentations college on soil physics 2003}
}