Periódicos: Recent submissions

  • Franco, Coaraci M.; Inforzato, Romeu (Instituto Agronômico (IAC), 1951-04)
    The present paper discusses the amount of water lost by the soil through the transpiration of coffee plants and shade trees in shaded coffee plantation. All methods and techniques employed in the study of transpiration of ...
  • Tosello, André (Instituto Agronômico (IAC), 1951-04)
    In the State of São Paulo, coffee cherries, after harvesting, are usually put to dry, in the open or are artificially dried until reaching a percentage of about 18% of water. With this humidity, the coffee husks can easily ...
  • Costa, A. S.; Mendes, J. E. Teixeira (Instituto Agronômico (IAC), 1951-07)
    A type of leaf chlorosis is shown by plants of excelsa coffee growing in nursery beds in a lath house at the Instituto Agronômico, Campinas. Tests made with various elements showed that this type of chlorosis is due to ...
  • Stevens, W. L.; Fraga Jr., C. G. (Instituto Agronômico (IAC), 1951-10)
    This paper was written primarily to illustrate the process of fitting constants to non-orthogonal data. The design of the experiment, on the pruning of lower branches of coffee-trees, was systematic (see plan at the ...
  • Mendes, A. J. Teixeira (Instituto Agronômico (IAC), 1951-10)
    The cultivation of coffee in the American coffee producing countries is not faced with any serious handicap. The future can not be far distant, however, when it will be necessary to establish new plantations back on the ...
  • Krug, C. A.; Mendes, J. E. T.; Carvalho, A.; Mendes, A. J. T. (Instituto Agronômico (IAC), 1950-01)
    Nos extensos trabalhos de melhoramento do cafeeiro, há 18 anos em realização na Subdivisão de Genética do Instituto Agronômico, tem-se dedicado especial atenção à espécie C. arabica L., pelo fato de todos os nossos cafèzais ...
  • Medina, Dixier M. (Instituto Agronômico (IAC), 1950-02)
    Only one plant of Coffea arabica L. var. rugosa K.M.C., is available for study Its fruit production is very low. Of the progeny observed, none has reproduced th rugose condition of the leaves characteristic of the parent ...
  • Mendes, A. J. T. (Instituto Agronômico (IAC), 1950-03)
    No presente trabalho são apresentadas as observações realizadas sôbre a microsporogênese nas variedades semperflorens e caturra, de Coffea arabica L. Notou-se que, no início da prófase, os cromossômios se colorem muito ...
  • Mendes, Cândida H. T. (Instituto Agronômico (IAC), 1950-04)
    This paper presents the results of cytological observations on microsporogenesis in the self-sterile species Coffea canephora. It was found difficult to study chromosome structure in the first stages of meiosis because the ...
  • Mendes, Cândida H. T. (Instituto Agronômico (IAC), 1950-04)
    A study has been made of the embryo sac in self-sterile Coffea canephora flowers of different ages. The process was observed to be normal and included the formation of two synergides and one egg cell in the micropilar ...
  • Carvalho, A.; Krug, C. A.; Mendes, J. E. T. (Instituto Agronômico (IAC), 1950-06)
    O dimorfismo dos ramos tem sido observado em vários gêneros de plantas, tais como Gossypium, Theobroma, Hedera, Musa, Araucária, Castilla, bem como em Coffea. Tal fenômeno se carateriza por uma diferenciação somática, que, ...
  • Franco, Coaraci M.; Inforzato, Romeu (Instituto Agronômico (IAC), 1950-09)
    In determinations made with a porometer it was verified that the stomatal opening of coffee leaves increases in size immediately after the leaves are detached from the plant (fig. 1). This fact indicates that the method ...
  • Tosello, André (Instituto Agronômico (IAC), 1950-09)
    In the regions of the so called "purple soils", in the State of São Paulo and Northern Paraná, coffee harvested from the ground is attended by a number of foreign matter among which lumps of soils of varying sizes make up ...
  • Cunha, João P. B.; Silva, Fabio M. da; Andrade, Ednilton T.; Barros, Murilo M. de (Associação Brasileira de Engenharia Agrícola, 2018-11)
    In recent years, the coffee has undergone major changes, and in case of transplanting operation, the use of machinery has proved to be a viable alternative to producers. Prior knowledge of the influence of the variables ...
  • Silvero, Nélida E. Q.; Marques Júnior, José; Siqueira, Diego S.; Gomes, Romário P.; Costa, Milene M. R. (Associação Brasileira de Engenharia Agrícola, 2018-09)
    The elaboration of maps to characterize the spatial variability of soil attributes assists in the strategic planning and decision making of agricultural managers. Precision and accuracy of maps are related to the ideal ...
  • Costa, Jéfferson de O.; Coelho, Rubens D.; Barros, Timóteo H. da S.; Fraga Júnior, Eusímio F.; Fernandes, André L. T. (Associação Brasileira de Engenharia Agrícola, 2018-09)
    The plant water potential and the leaf temperature are physiological responses of the coffee tree that can be used as indicative of the irrigation management of this crop. There is a dependence between the leaf water ...
  • Carvalho, A. (Instituto Agronômico (IAC), 1952-04)
    Os resultados das análises genéticas das principais variedades de Coffea arabica têm demonstrado que elas diferem da variedade typica, tomada como têrmo de comparação, apenas por um ou dois pares de fatores genéticos ...
  • Mendes, A. J. T.; Medina, Dixier M.; Conagin, Cândida H. T. Mendes (Instituto Agronômico (IAC), 1954-10)
    Uma pequena porcentagem de frutos sem sementes é comum às plantas de tôdas as variedades de Coffea arabica, parecendo tratar-se de um fenômeno puramente fisiológico. No café Mundo Novo porém, além dêste tipo de plantas, ...
  • Carvalho, A.; Krug, C. A. (Instituto Agronômico (IAC), 1952-04)
    No planalto de São Paulo, o cafeeiro normalmente floresce duas a quatro vezes por ano, nos períodos compreendidos entre fins de julho a novembro. Raramente floresce mais vêzes, e um pouco além dessa estação. Em 1934, foram ...
  • Medina, Dixier M. (Instituto Agronômico (IAC), 1952-04)
    Coffea Dewevrei De Wild, et Th. Dur. is a diploid species with 2n = 22 chromosomes. Details on the microsporogenesis are presented in this paper. From pachynema to diakynesis the 11 bivalents were well differentiated into ...

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