Data/hora: 10/06/2024 01:05:25

Provedor de dados: | Anais da Escola Superior de Agricultura Luiz de Queiroz
País: | Brazil
Título: | Estudos sobre a alimentação mineral do cafeeiro: XII. efeito da adubação na composição mineral das fôlhas
Autores: | Malavolta,E.; Graner,E.A.; Haag,H. P.; Sarruge,J.R.
Data: | 1964-01-01
Ano: | 1964
Resumo: | Leaf samples from coffee plants under three different fertilizations, namely NPK, NP and PK, were collected for chemical analysis. It was found that the contents of N, K, Ca, Mg and S in the first, second, third and fourth pair of leaves were the same from the statistical point of view. On the onder hand, there was a significant effect of the position of the leaf in the branch on the P content, which was higher in the first pair. With the exception of the P level ,the four pairs of leaves are chemically uniform. Nevertheless it is not considered as convenient to mix all kinds of leaves into one sample, since the composition may vary a great deal when sampling is done some other time, such as the period of fruit growing. It is recommended therefore that either the third or the fourth pair leaves should be collected for routine work in foliar diagnosis.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761964000100008

Editor:

Universidade de São Paulo

Escola Superior de Agricultura

Relação: | 10.1590/S0071-12761964000100008
Formato: | text/html
Fonte: | Anais da Escola Superior de Agricultura Luiz de Queiroz  v.21 1964
Fonte: | info:eu-repo/semantics/openAccess