01716naa a2200193 a 450000100080000000500110000800800410001910000160006024501000007626000090017650000190018552011010020465300570130570000160136270000190137870000210139770000160141877300880143410873942012-10-31       2012    bl uuuu     u00u1 u    #d1 aRECH, T. D.  aRecommendation of soil fertility levels for willow in the southern highlands of Santa Catarina.  c2012  aISSN, 01000683  aThe species Salix x rubens is being grown on the Southern Plateau of Santa Catarina since the 1940s, but so far the soil fertility requirements of the crop have not been assessed. This study is the first to evaluate the production profile of willow plantations in this region, based on the modified method of Summer & Farina (1986), for the recommendation of fertility levels for willow. By this method, based on the law of Minimum and of Maximum for willow production for the conditions on the Southern Plateau of Santa Catarina, the following ranges could be recommended: pH: 5.0?6.5; P: 12?89 mg dm-3; Mg: 3.2?7.5 mg; Zn: 5.0?8.3 mg dm-3; Cu: 0.8?4.6 mg dm-3; and Mn; 20?164 mg dm-3. The Ca/Mg ratio should be between 1.2 and 2.9. For K and Ca only the lower (sufficiency level), but not the upper threshold (excess) was established, with respectively 114 mg dm-3 and 5.3 cmolc dm-3. It was also possible to determine the upper threshold for Al and the Al/Ca ratio, i.e., 1.7 cmolc dm-3 and 0.28, respectively. For maximum yields, the clay in the soil surface layer should be below 320 g dm-3.  aSalix x rubens nutritional diagnosis cropping system1 aZANETTE, F.1 aZANATTA, J. C.1 aNUERNBERG, N. J.1 aBRANDES, D.  tRevista Brasileira de Ciência do Solo, Viçosa, MGgv. 36, n. 3, p. 877-882, 2012.