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| Accorsi,Walter R.; Haag,Henrique P.. |
| The present work was carried out in order to study: (1) the symptoms of deficiency and excess of macronutrients (N, P, K, Ca, S, Mg) in the coffee plant (Coffea arabica L. var. Mundo novo); (2) the modifications induced by those treatments in the hystological make up of the leaves; (3) the effects of deficiency and excess on the growth and in the chemical composition of the plants. Young coffee plants were grown in nutrient solution, three treatments being used, namely: complete solution (HOAGLAND & ARNON, 1950), deficient solution, in which a giVen element was omitted, and solution with 3 times the concentration of the element under study. The main conclusions can be summaryzed as follows. 1. SYMPTOMS. Clear cut symptoms of malnutrition were... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1959 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761959000100002 |
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| Accorsi,Walter R.; Santos,Clóvis F. O.; Ferraz,Eduardo C.; Barros,Myrthes A. Adâmoli de; Mitidieri,José. |
| According previous studies about longevity in maize by ACCORSI e ADÂMOLI DE BARROS, (1961) the authors presents in this paper the results of work on longevity of seedlings of beans. Seeds were separated in three groups according their weight, as followings: small 80-120 mg; medium 130-140 mg and big 150-200 mg. The sowing of the seeds was made in pure sand and the seedlings were distributed in distil. water and in complete solution of Arnon and Hoagland. Each treatment was made in two replications with eight seedlings by treatment. At present time the following conclusions can be related: 1.°) - Eight days after germination, the cotiledones of all the seedlings started to fell down, fourteen days after, all cotiledones had fell down. 2.°) - Fifteen days... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1964 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761964000100011 |
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| Accorsi,Walter R.. |
| 1 - Os estudos sôbre o órgão cupuliforme datam de 1941, ocasião em que observávamos os "seedlings" de Eucalyptus tereticornis e Eucalyptus citriodora, com o propósito de colher material para estudos anatômicos comparativos das citadas espécies (1). 2 - Examinámos, a seguir, "seedlings" de outras espécies de Eucalyptus, comprovando em tôdas a existência do órgão cupuliforme. 3 -BRIOSI e WARMING, ambos mencionados por HABER-LANDT (4), assinalaram a presença de longos pêlos absorventes, no limite entre radícula e caulículo, respectivamente de plantas aquáticas e de Eucalyptus e outras Myrtaceae, sem contudo se reportarem à existência de qualquer órgão na região considerada. 4 - Revendo a bibliografia especializada, entre as quais a "A Critical Revision of the... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1956 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761956000100001 |
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