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Registros recuperados: 204
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Contents Page AgEcon
Tipo: Journal Article
Ano: 1950 URL: http://purl.umn.edu/8787
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Contribuições para a flora amazônica. Repositório Alice
PIRES, J. M..
Tipo: Artigo de periódico Palavras-chave: Quiina; Quinaceae; Brasil; Specie; Plant.; Botânica; Espécie; Planta.; Amazonia; Botany..
Ano: 1950 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/394354
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Contribution à l'étude des Hepialidae (22ème note) : Hepialidae du Musée de Leiden Naturalis
Viette, P.E.L..
On trouvera ici l'étude d'une partie des Hepialidae du Musée de Leiden que le Dr. van Regteren Altena a bien voulu nous confier pour étude, ce dont le remercions vivement. Nous y avons ajouté l'étude de quatre espèces du British Museum (N.H.) et une du Museum de Paris. HÉPIALIDES DE LA NOUVELLE GUINÉE On connait quelques Hépiales décrites de Nouvelle Guinée. Elles appartiennent au magnifique genre Oenetus H.S. et au genre Oxycanus Walk, (s.l.). On trouvera ici l'étude de quelques espèces appartenant à ce dernier genre. Grace à l'amabilité de Mr. J. D. Bradley du British Museum (N.H.), que nous remercions, les quatre espèces décrites par Joicey et Talbot (1917) ont pu etre étudièes. Paraoxycanus n. gen. Ce nouveau genre, très proche du genre Oxycanus Walk,...
Tipo: Article / Letter to the editor Palavras-chave: 42.75.
Ano: 1950 URL: http://www.repository.naturalis.nl/record/318816
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Contrôle de vira-cabeça do tomate pela destruição do vetor Bragantia
Costa,A. S.; Forster,Reinaldo; Fraga Júnior,C..
Vários inseticidas foram ensaiados no contrôle da moléstia de vírus do tomateiro denominada vira-cabeça, transmitida por um tripes do gênero Frankliniella. Os resultados obtidos nestes ensaios mostraram que, dos inseticidas ensaiados, Rhodiatox e Hexason 2540M foram os mais eficientes. Os dados obtidos permitem que se sugira o seguinte programa de pulverização de tomateiros, para o contrôle de vira-cabeça. Na sementeira: Pulverizações de 3 a 5 dias com Rhodiatox (0,25 a 0,50%) ou Hexason 2540M (0,15%). No canteiro de repicagem: Pulverizações cada 3 a 5 dias com Rhodiatox (0,50%) ou Hexason 2540M (0,15%). Na plantação definitiva: Pulverizações cada 5 a 7 dias com Rhodiatox (0,50% a 1%) ou Hexason 2540M (0,25%) até cêrca de 40 dias após a transplantação.
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000100001
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Critical notes on some amazonian plants. Repositório Alice
DUCKE, A..
Tipo: Artigo de periódico Palavras-chave: Brasil.; Botânica; Taxonomia.; Amazonia; Botany; Taxonomy..
Ano: 1950 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/394360
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Cyril Tenison White --- Obituary Notice. 1890 – 1950 Naturalis
Steenis, C.G.G.J. van.
The death of Cyril Tenison White, Government Botanist, Brisbane, Queensland, occurred on August 16, 1950.; The news came suddenly and hit hard; we lost one of the kindest and gentlest of men and, besides, the greatest living authority on the Papuan and Melanesian flora. Mr White had been seriously ill, two years ago, but seemed to have recovered. His heart remained weak, however, and though he seemed in good health, he had to desist from mountain climbing.
Tipo: Article / Letter to the editor
Ano: 1950 URL: http://www.repository.naturalis.nl/record/532777
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Dates of publication of Malaysian phyto-taxonomical literature 6 Naturalis
Steenis, C.G.G.J. van.
Blume, C. L, Bijdragen tot de kennis van de Flora van Nederlandsch Indië. Reprint of part 4 ( 1850). Dr M. A. DONK draws attention to the fact that part 4 of BLUME’ s Bijdragen was reprinted in 1850, at Batavia. The printers were VAN LANGE & Co, not the Landsdrukkerij this time. A copy of this second edition is in the Bibliotheca at Bogor. The letterprint is different from that of the original and the paper is of inferior quality. The numbering of the pages is kept as much as possible in agreement with the original edition. At Bogor there is an other copy of the Bijdragen in which part 4 is in MS,; this indicates that at some time no stock was available of the original edition.
Tipo: Article / Letter to the editor
Ano: 1950 URL: http://www.repository.naturalis.nl/record/533472
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Dates of publication of Malaysian phyto-taxonomical literature V Naturalis
Wit, H.C.D. de.
In the following the abbreviation B.Z. means ’Binnenlandsche Zaken’ or ’Ministry for the Interior’; all records referred to are preserved in the National Archives (’Rijksarchief’) at The Hague. By Royal Decree of Febr. 10, 1839, no. 101 (cf. B.Z., 5th Div., Febr. 18th, 1839, no 132) it was decided to publish a printed work at the expense of the Government. The issue was to consist of 250 copies and each of the planned 3 volumes were to contain c. 400 pp., 60 (coloured) plates and quarterly instalments were to be published. The costs were to be deducted from the funds granted to the ’Natuurkundige Commissie’ (Board for the Naturel Sciences) who had explored in the Dutch East Indies since the withdrawal of the English (1816). The work should embody the...
Tipo: Article / Letter to the editor
Ano: 1950 URL: http://www.repository.naturalis.nl/record/532788
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Determinação fotométrica do ácido ascórbico Anais da ESALQ
Leme Junior,Jorge; Malavolta,E..
The photometric determination of ascorbic acid with the "E. E. L. portable colorimeter" can be carried" out rapid and conveniently using either 3% HPO3 or 0,4% (COOH) 2 as protective agent. The standards would contain from 2 to 20 micrograms of ascorbic acid per ml of metaphosphoric or oxalic acid solutions. We mix 10 ml of these solutions with 3 ml of the adequate citrate buffer solutions, and we pipet 5 ml of the resulting mixture to a matched test tube containing 5 ml of sodium - 2,6 - dichlorobenzenoneindophenol (80 mg per liter); then we shake well and after 15 seconds the extintion is read using green filter. The readings are subtracted from the blank one. Designating the differences by x and the concentrations of ascorbic acid/ml in the standards by...
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761950000100016
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Dimorfismo de ramos em Hydnocarpus Bragantia
Mendes,J. E. Teixeira.
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000600003
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Disposição sistemática dos canteiros: sua influência sôbre a estimativa do êrro experimental Bragantia
Conagin,A..
This paper describes the results of superimposing certain types of 5 x 5 latin squares on a wheat uniformity trial. The purpose was to investigate the bias in the estimate of error when certain systematic squares (knight's move and diagonal) are chosen and to compare the results under conditions in Brazil with those obtained by Tedin in a similar investigation. The following conclusions are drawn : a) when latin squares are chosen by a random process, as recommended by Fisher, the observed distribution of the variance ratio of "treatments" compared with error is i n agreement with that given by theory; b) the estimation of error variance is biased when systematic squares are employed. In agreement with Tedin, we find that the knight's move square furnishes...
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000700002
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Editorial - Crop Insurance AgEcon
Tipo: Journal Article Palavras-chave: Crop Production/Industries.
Ano: 1950 URL: http://purl.umn.edu/8898
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Editorial - Long-Term Agricultural Development AgEcon
Tipo: Journal Article Palavras-chave: Agricultural and Food Policy.
Ano: 1950 URL: http://purl.umn.edu/8982
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Editorial - Mapping the State's Agricultural Resources AgEcon
Tipo: Journal Article Palavras-chave: Agricultural and Food Policy.
Ano: 1950 URL: http://purl.umn.edu/8708
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Editorial - The Seasonal Problem in Agricultural Marketing AgEcon
Tipo: Journal Article Palavras-chave: Marketing.
Ano: 1950 URL: http://purl.umn.edu/8786
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Efeito da época de semeação na produção do Hibiscus cannabinus L. Bragantia
Medina,J. C..
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000500001
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Efeito do nitrogênio, fósforo e potássio na adubação da batatinha - Solanum tuberosum L. Bragantia
Boock,O. J.; Castro,J. B. de.
Five potatoes fertilizers trials were carried out. in diffeient soil types of the State of São Paulo with the purpose to study the effect of nitrogen, phosphoric acid and potash, on tuber production. It was found that nitrogen increased plant growth, intensified green color of foliage and retarded maturity. Nitrogen also increased susceptibility to fungus diseases. Phosphoric acid increased yield and shortened the vegetative period. Potassium induced a light -green color of the foliage, but otherwise had almost no influence on plant development. Phosphoric acid was the most important factor in increasing tuber production : nitrogen was second and potassium, third. A response to potassium was noticed only when this element was applied together with...
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000800002
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Emprêgo de carborundo em inoculações com Sphaceloma Bragantia
Costa,A. S..
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000100005
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Emprêgo de "Gammexane" no contrôle de insetos prejudiciais aos cereais armazenados Bragantia
Germek,Emílio.
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000400004
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Enlatamento do milho doce: observações preliminares Bragantia
Veiga,Ari de A..
Various methods for canning sweet corn were compared. Tests made on canned samples kept for three years indicated the following treatments as satisfactory : a) preservation in boiling water followed by sterilization of the canned product under 7 to 14 pounds pressure for one hour ; b) preservation of the sweet corn in 4% sucrose solution, followed by sterilization as in (a) ; c) preservation in a solution made up of 2% sucrose and 2% sodium chloride, followed by sterilization as in (a).
Tipo: Info:eu-repo/semantics/article
Ano: 1950 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950000800001
Registros recuperados: 204
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