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Contribution to the study of available boron in soils of the State of S.Paulo, Brazil. 1. Growth and mineral composition of sunflower (Helianthus annus Mill.)

, : Contribution to the study of available boron in soils of the State of S.Paulo, Brazil. 1. Growth and mineral composition of sunflower (Helianthus annus Mill.). Anais da Escola Superior de Agricultura ' Luiz de Queiroz' , Universidad de Sao Paulo 44(1): 695-739

Sunflower plants were grown in the greenhouse in five soil series. Visual assessment, based on the age of the plants when first symptons of boron deficiency appeared, showed that red yellow podzolic soils had the lowest available boron concentration, followed by red latosols, quartzose sands, structured reddish-purple earths, and reddish-purple latosols. The growth characteristic showing the highest correlation with available soil boron was plant height.

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