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| Registros recuperados: 195 | |
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| Mendes,A. J. Teixeira. |
| 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 high-priced old exploited lands. Need will be felt for improved varieties. At the same time, it is not known if in a near future the American coffee growers will not be in trouble with diseases as terrible as Hemileia, which the present age of transport cannot restrict to non-American areas. In the program of coffee improvement, interspecific crosses are expected to take a very important place. The introducing of desired characteristics of other species into Coffea arabica by hybridization is made difficult by the fact that, while C.... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000400005 |
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| Verdade,F. C.. |
| This work deals with the nitrates determination bj r the phenoldisulfonic acid method in the soils of São Paulo State. Several modifications were introduced which led to outline an analytical procedure. The nitrates are extracted by percolation, with a solution of H2SO4 0,01 N which is efficient in obtaining clear filtrates without clay and it is a saving time procedure. The ratio employed to remove soil nitrates is one weight of soil for three volumes of the extractor. The H2SO4 solution was the best extractor found because it dissolves less organic matter from the soil than other methods. Also, with the method described, the operation of removing chlorides is easy and it is possible to use a blank determination. Losses of nitrates are significant when... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000100001 |
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| Tosello,André. |
| 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 be broken by rubbing the dried cherries in the hand. This operation is done before the coffee is stored. In this paper, are presented some preliminary data about the feasibility of storage-of coffee with more than 18% of water. The results of the experiments have indicated: a) in the Campinas enrivonment, coffee can be stored with about 24% of water-without loosing color and cup-quality; b) the storage with 24% of water reduces by 20-30% the drying operation and permits better condition for more uniforme coffee drying inside the hopper... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000200008 |
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| Boock,O. J.. |
| As variedades de batatinha Dar, Oka, Bem, Pionier e Kolobrzeskie, foram recebidas da Polônia, para verificação do seu comportamento sob as nossas condições, em confronto com a variedade "Eigenheimer", já conhecida (1). Com êsse objetivo, foram instaladas oito experiências, sendo três em Capão Bonito, em solo sílico-argiloso, três em Louveira, em salmourão, e duas em Indaiatuba, em terreno sílico-argiloso. Das observações realizadas durante o período vegetativo, e dos resultados da produção, conclui-se o seguinte : a) tôdas as variedades apresentaram película amarelada e que se tornou verde à ação da luz ; b) a folhagem da variedade Kolobrzeskie se mostrou de um verde-claro e de porte médio, contrastando com a Pionier, que se mostrou de um verde forte e... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000400004 |
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| Catani,R. A.; Gallo,J. Romano. |
| O presente trabalho estuda a capacidade de extração do manganês do solo, por diversas soluções, a fim de esclarecer as formas de ocorrência daquele elemento nos solos do Estado de São Paulo. Os solos estudados foram representados por três amostras de terra roxa legítima (solo oriundo de diabase), três amostras de solo massapé-salmourão (solo proveniente de gnais, xistos, granitos, etc.) e duas amostras de solo arenito Bauru (solo derivado da rocha sedimentar denominada arenito Bauru). Para extrair o manganês foram usadas as soluções : solução normal de acetato de amônio com pH = 7,00 ; solução normal e meio normal de nitrato de potássio ; solução normal e meio normal de nitrato de sódio ; solução normal de acetato de magnésio ; solução normal de nitrato de... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000300006 |
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| Mendes,J. E. Teixeira. |
| Foi continuado o ensaio do desbaste dos ramos inferiores do cafeeiro, instalado na Estação Experimental Central de Campinas, em 1932. O ensaio compreende duas séries : a) desbastada ; b) não desbastada. Cada série se compõe de 5 repetições com 25 cafeeiros cada uma. A variedade em cultivo foi a Coffea arabica L. var. typica Cramer. A série desbastada foi mantida sem os ramos primários até uma altura de 50 cm do solo. Na série não desbastada não se interferiu de modo algum nessa parte da planta. As colheitas foram iniciadas em 1935. A série não desbastada produziu significativamente mais, no período todo examinado, isto é, em dezesseis safras (1935-1950). Não houve grande diferença no tamanho das sementes. A maturação foi um pouco apressada na série... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000400002 |
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| Franco,Coaraci M.. |
| The coffee plant does not thrive well under shade in most of the coffee areas of the State of São Paulo, Brazil. It has been shown that water competition from the shade trees during the dry season is the factor responsible for the failure in growing coffee under shade in São Paulo. In all cases where the coffee plants were not thriving well under shade, the soil moisture after two to three months of drought was at the wilting point at the depths most utilised by the root systems of shade trees and coffee plants. In open plantations this was never observed. All commercial coffee plantations of Central America are shaded. Most of them are located in areas with a dry season as long as in São Paulo and some times even longer. A comparative study of the... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000200002 |
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| Lordello,Luís Gonzaga E.. |
| Xiphinema brasiliense, a new opistodelphic species of Brazilian nematode, was found in soil around potato roots at Sapecado (State of São Paulo, Brazil). It differs from the other known opistodelphic species of the genus, by its type of tail end, which is digitate. It contrasts most strongly with X. ensiculiferum (Cobb, 1893), in which the shape of the extremity is decidedly hemispheroidal. The species most closely resembling X. brasiliense isX. chambersi Thorne, 1939, from which it is distinguished by its longer stylet and the mentioned characteristic form of the end of the tail. The X. brasiliense amphids are also very short and wide, unlike those of X. chambersi. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000100010 |
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| Viegas,G. P.. |
| A new variety of adlay (Coix lacryma-jobi L.) is being cultivated in the Slate of São Paulo, its chief characteristics being small height, oblong black seeds, and fair yield, especially in low lands, with abundant rainfall and high temperature. Some trials were conducted with this plant in four experiment stations of the Instituto Agronômico in the State of São Paulo. The yields were very variable from year to year and place to place. The following preliminary statements could be made with regard to highland conditions in this state: a) adlay should be planted in October-November ; b) spacing and rate of planting is not very important within the limits of 60-120 cm between rows and 8 to 33 g of seed per 10 m in the row, on account of the great tillering... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000100009 |
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| Verdade,F. da Costa. |
| No estudo da serapilheira nos solos de mata do Arenito Bauru foram feitas as seguintes observações: Elaborou-se uma nomenclatura específica, dada a carência de termos técnicos em português, para denominar as diferentes camadas que constituem os horizontes orgânicos das matas. A matéria orgânica nos horizontes A00 e A0 foi determinada pelo processo de perda ao rubro e não pela multiplicação do teor de carbono por 1,724, porque, na serapilheira, este último processo conduz a resultados menos exatos. Apesar de não coincidirem exatamente as coletas de serapilheira com a dos perfis do levantamento pedológico já efetuado anteriormente no local, a sua associação permitiu esboçar o estado da matéria orgânica nestes solos. A quantidade de matéria orgânica da... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000300002 |
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| Boock,O. J.; Küpper,A.; Sales,J. Moreira. |
| Besults are presented of mineral fertilizer trials witht Irish potato crop in the State of São Paulo. The experiments were conducted in the flat lands of the Paraíba River banks. In this region, potato plantings are usually made from May to October, a period with little rain, :nul practically free from flood. From October to April, when good weather conditions prevail, rice is almost the only crop grown. Iu other regions of the State, potato is planted in February or in August. Chemical analyses of an average sample of the soil revealed a high organic matter content, about seven fold higher total nitrogen content and a twelve fold higher total carbon content, as compared with those found in a soil sample taken from Capão Bonito, an important potato area in... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000300003 |
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| Catani,Renato A.. |
| This paper reports a study, from a chemical arid microcheniical point of view, of the soil potassium in the type of soil originating from the Arenito Bauru. A mechanical separation of the soil was carried out in order to study the potassium distribution in the soil. The fractions 0.250 to 0.105 mm, 0.105 to 0.053 mm, 0.053 to 0.020 mm, 0.020 to 0.010 mm and 0.010 to 0.002 mm were isolated. The chemical data, i. e., the exchangeable and the total potassium content pointed out the occurrence of primary minerals of potassium in the fractions, 0.250 to Ò.105 mm, 0.105 to 0.053 mm and 0.053 to 0.020 mm. A simple microchemical technique was performed by which it was possible to differentiate the potassium bearing mineral from quartz, ilmenite, magnetite and... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000100004 |
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| Sousa,O. Ferreira de; Canecchio Filho,V.; Abramides,Eduardo. |
| Apesar de pouco difundida em São Paulo a cultura do girassol, resolveu-se executar um programa de ensaios regionais de variedades a fim de se determinar o seu comportamento em algumas regiões do Estado. Assim foram realizados oito ensaios, agrupados em três séries, nas estações experimentais de Ribeirão Prêto, Pindorama e Mococa, durante os anos de 1947 a 1949. A análise dos resultados indicou como mais produtivas as variedades Riscado, La Estanzuela n.° 53, Línea-16, Línea-30 e Sei. Fischer-100, esta última incluída apenas nos ensaios da terceira série. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000200007 |
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| Stevens,W. L.; Fraga Jr.,C. G.. |
| 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 beginning). Three constants were fitted, representing respectively the treatment contrast, the difference between upper and lower half of the field and the linear gradient of fertility across the field. The use of the residual sum of squares for the estimation of error is not, of course, logically correct but it is unlikely to lead to seriously wrong conclusions if caution is exercised. In the event, the procedure failed to eliminate any soil heterogeneity (see Analysis of Variance, p. 288). Inspection of the data showed that much of the... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000400003 |
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| Verdade,F. C.. |
| From a study of the variation of nitrates in the soil known as terra roxa misturada (mixed purple soil), the following conclusions were drawn : a) The nitrate content of this soil reveals a periodic variation through the year. The same kind of variation is expected in the majority of S. Paulo soils, because the climate, with minor exceptions, is fairly uniform over the State. b) As nitrification proceeds at a higher rate in the hot wet (September-May) than in the cool dry season (May-September), nitrates accumulate in the soil during the first period and disappear in the second. However, as an exception to the above rule, there appeared to be a fall in nitrates during December. This may have been due, either to leaching by rain, or to absorption by weeds,... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000400001 |
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| Paiva Neto,J. E. De; Catani,H. A.; Küpper,A.; Medina,H. Penna; Verdade,F. C.; Gutmans,M.; Nascimento,A. C.. |
| Êste trabalho suscinto sôbre os solos do Estado de São Paulo, é o resultado de 15 anos de estudos. Foram feitos nesse espaço de tempo, mais de 80.000 km de excursões pelo Estado ; coletados cêrca de 700 perfis de solo. com suas várias camadas e compreendendo profundidades entre 1,5 e 5,0 m* Foram tomadas mais de 20.000 amostras superficiais (até 40 cm) de solo ; mais de 4.000 amostras de rochas e cêrca de 6.000 fotografias. A superfície estudada, envolve cêrca de 24.700.000 ha e está situada entre as latitudes sul de 19°50' e 25°10' e entre as longitudes (seg. Greenwich) de 44°10' e 53°10'. As altitudes variam entre 3 e 1.700 m acima do nível do mar. Neste trabalho básico, inicial, dividimos o Estado em 10 grandes tipos de solo que se acham bastante... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1951 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000300005 |
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| Registros recuperados: 195 | |
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