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Browsing Periódicos by Issue Date
Now showing items 21-40 of 2884
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(Instituto Agronômico (IAC), 1949)Após fazer a revisão de alguns dos principais trabalhos sôbre a auto-esterilidade no gênero Coffea efetuados em Java, foram relatados, de modo resumido, os resultados das pesquisas genéticas e citológicas que estão sendo ... -
(Instituto Agronômico (IAC), 1949)The Coffea arabica L. variety rugosa has been characterized as having rugose or roughened leaves. However, progenies of this variety obtained from selfed and open pollinated flowers have not, as observed to date, produced ...
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(Instituto Agronômico (IAC), 1949)Coffee plants (Coffea arabica L.) were grown in nutrient solutions for the purpose of studying deficiency symptoms of the following elements : nitrogen, phosphorus, potassium, magnesium, calcium, sulphur and iron. The ...
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(Instituto Agronômico (IAC), 1949)This paper describes the statistical analysis of a varietal trial with two unusual characteristics : (i) The plant (coffee) is one of those which show strong maxima and minima of production in alternate years. This phenomenon ...
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(Instituto Agronômico (IAC), 1949)Lançando mão de dados publicados por outro autor, (1) sôbre o comportamento da "Broca do Café", quando criada a várias temperaturas, em laboratório, o autor, aceitando em princípio que uma hipérbole equilátera traduz o ...
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(Instituto Agronômico (IAC), 1949-05)An experiment was started in 1931 for the purpose of making a comparative study of the productivity of following varieties of Coffea arabica L, : Nacional (Coffea arabica L. var. typica Cramer) Amarelo de Botucatu (Coffea ...
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(Instituto Agronômico (IAC), 1949-09)Uma nova variedade de Coffea arabica L., provavelmente originária de Manhumirim, Estado de Minas Gerais, e cultivada em pequena escala no Estado do Espírito Santo, foi recebida, pelo Instituto Agronômico de Campinas, em ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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, ...
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(Instituto Agronômico (IAC), 1950-07)A new method of propagation of the coffee plant by stem-cuttings has been developed. Single-node stem pieces with two opposite leaves were split longitudinally in two halves. These were treated by a hormone and rooted in ...
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(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 ...
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(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 ...
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(Instituto Agronômico (IAC), 1950-10)In the present paper the authors present the results of a genetic study concerning the erecta type of growth of the lateral branches of Coffea arabica L. The erecta mutant, which probably originated in Java, differs from ...
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(Instituto Agronômico (IAC), 1950-11)Do plano geral de trabalhos sôbre o melhoramento do cafeeiro, elaborado pela Secção de Genética em 1933, faz parte o estudo de uma série de híbridos obtidos pelo cruzamento entre plantas da variedade bourbon. O estudo da ...
Now showing items 21-40 of 2884
