Maluche-Baretta, Carolina Riviera Duarte, Cassandro Vidal Talamini do Amarante, and Osmar Klauberg Filho. 2006. “Multivariate Analysis of Soil Attributes of Apple Orchards under Conventional and Organic Production Systems”. Pesquisa Agropecuaria Brasileira 41 (10):1531-39. https://doi.org/10.1590/S1678-3921.pab2006.v41.7313.