Bragantia

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List of Papers (Total 294)

Produção de fôlhas de diferentes variedades de amoreiras, durante o período de formação das mudas nos sistemas de cepo e fuste

In this paper the experimental results are reported on trials with leaf production carried out with common varieties of mulberry trees (Morus alba)during the period of seedlings formatioin by the systems known as "cepo" and "fuste", in two regions of the Paulista Plateau, namely Limeira and Tatuí. Regarding leaf production, in two years, for the regions, results allowed to reach...

Influência das condições de armazenamento na composição química de tubérculos de batatinha

In this paper an attempt was made to study the possible transformations which the potato tubers go through during the storage period both under normal storage conditions and under refrigerated-chamber conditions as well as with the consertvation alternating and varying under each of these conditions. Records were made of the analyses of the tubers concerning their contents of dry...

Situação da cafeicultura em alguns municípios da região nordeste do Estado de São Paulo, levantada com auxílio da fotografia aérea

Based on aerophotographs made in 1962 (1:25,000), a study was carried out on the distribution of the coffee culture in 13 counties of the Northeast of São Paulo State. Determinations were made on the number of plants and plantations, occupied area, presence of conservative practices and correlation of the culture with the general relief and soil types. About 12.1 million coffee...

Aplicação de nitrogênio em cobertura, em cultura de arroz

This paper reports about an experiment carried out in argillaceous soil of lowlands, located at the Experiment Station of Pindamonhangaba, in the Paraiba River valley, and had in view the study of application of ammonium sulfate as top dressing, in rice crops. This same trial had further the purpose to find out which were the necessary doses of nitrogen that led to major...

Distribuição geográfica atual dos algodoeiros perenes no Brasil: primeiro levantamento parcial

Four expeditions, covering regions of Brazil, located between 5.° and 25.° south, latitude, were performed by the authors, during the period from 1962 to 1965. They were supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo and their aims were: (a) to determine the present geographical distribution of perennial forms of cotton plants; (b) to get samples of these...

Adubação da cana-de-açúcar. XIII - Estudo conjunto de experiências com diversos fosfatos realizadas entre 1950 e 1963

Based on experiments conducted from 1950 up to 1963 on different soil types of the State of São Paulo, the authors studied the efficiency of several phosphorus carriers, for the fertilization of sugar cane, when applied in the presence of NK at the rate of 100 kilograms of total P2O5 per hectare. The areas used were all deficient in phosphorus with pH varying between 4.5 and 6.3...

Resultados preliminares sôbre o estudo do quenafe como matéria-prima para papel

The production of pulping raw material for the paper industry of four varieties of kenaf (Hibiscus cannabinus L.) sown at three spacings (30, 40 and 50 cm) was compared in a field trial made at the Experimental Center, Campinas, SP. The analysis of variance of obtained data showed no differences between production of varieties or/and spacings. As an average, the yield was 29.4...

Adubação do trigo: I - Experiências com N, P, K e S em Latossolo roxo do vale do Paranapanema

Two N, P, K, S mineral fertilizer trials on wheat (Triticum aestivum L.), were carried out in 1970 and 1971 on a latossolic B "Terra Roxa" soil. The results showed good response to phosphorus, medium to nitrogen, poor to sulphur and no response to potassium.

Poliploidização em berinjela (Solanum melongena L.): II - Observações em plantas resultantes de tratamentos com colquicina

The observations on several morphological characteristics made on plants derived from treatments of seed with colchicine in the egg-plant (Solatium melongena L.) led to separation of a reasonable number of possible polyploids. Chromosome number determined in P.M.C. indicated the existence of tetraploid plants, chimeric plants at level 24-48 and at level 48-96 beside the diploid...

Efeitos da colquicina em Arachís hypogaea L.

Treatments with colchicine in peanuts have been tried on seed, coty-ledonary buds and on seedling main stems previously cutted. Polysomatic roots were observed in F2 plants, but there was not any evidence of polyploidy in other parts; some treatments produced irregu-lary larger pollen grains. Phenotypic modifications were observed: some plants with few and long branches as well...

Efeitos da época de incorporação, ao solo, de restos vegetais de soja comum (Glycine max (L.) Merril), sobre a produção de feijoeiro

Experiments were conducted at various localities during two years (1967/68 and 1969/70), in the State of São Paulo. The main objective was to study the effects on dry bean (Phaseolus vulgarisL.) production of the time of incorporation of soybean dry matter into the soil together with the application of NPK. The data showed that in 1967/68 there was an increase in production due...

Gênese e classificação de alguns solos da bacia do Ribeirão Tijuco Preto, Município de Rio das Pedras, SP: II - Classificação dos solos

In this paper four soil profiles ocurring on a toposequence located in the hydrographic basin of the Tijuco Preto stream, Rio das Pedras County in the State of São Paulo were studied. On the lower part of the toposequence a Lithosol-argillite-shale substratum phase (TP-12) and a Red-Yellow Podzolic Soil Piracicaba variation (TP-13) were found. On the upper part of the...

Levantamento pedológico detalhado, da estação experimental de Limeira, SP

This paper presents the soil survey, at a series level, of the Experimental Station of Limeira, SP. The station is located on the northern part of the natural sub-region of the Tietê River and covers an area of 198 ha. The general topography is gently undulated; the climate can be defined as Cwa according to Köppen; the parent material is of a drift nature, derived from mudstone...

Algumas características de variedades de rami e suas correlações com o teor de fibra

They were tested some agro-botanical and technological characters of ramie (Boehmerict nivea Gaud.) and their simple and partial correlations. In this study the following international varieties were considered. Hakui Ibgou, White Skin, Taiwan Hakushi, Shalien n.° 1, Hsi-Ching-Chin-Hsin, Banmethuot, Miya-saki 112, E 47-1, Murakami, P.I. 87.521, Kagisei, and Yilan n.° 1. The...

Calagem e adubação mineral da soja (Glycine max (L.) Merrill) variedade Santa Maria, em solo de várzea

A field experiment was carried out on a soil rich in organic matter to study the influence of lime and fertilizers on the production of soybean dry matter and on the soil chemical properties. Three rates of lime (2.3, 4.6 and 6.9 t/ha), combined with two rates of superphosphate and one rate of potassium chloride were employed. Molybdenum and boron were also applied in some...

Adubação do trigo VII: Experiências com N, P, K e S em diferentes tipos de solos do estado de São Paulo

This paper presents the results of twelve N, P, K, S mineral fertilizer trials on wheat (Triticum aestivum L.), carried out in 1969 to 1973 at Tietê, Capão Bonito, Itaberá and Itararé, State of São Paulo. The results obtained in Capão Bonito and Tietê trials did not show significant responses to nitrogen, phosphorus, potash, and sulfur. The effect of phosphorus and mineral...

Flutuação de populações de ácaros na cultura algodoeira em algumas regiões do estado de São Paulo

Samples of mites were collected from cotton plants in several regions of São Paulo State. Monthly counsts were made in three consecutive crops, generally planted in October. The data obtained permitted to establish graphs illustrating the fluctuations of mite populations in the respective regions. Tetranychus (T.) urticae and Polyphagotarsonemus latus generally showed peak of...

Melhoramento das variedades paulistas de algodão. Criação da IAC 13-1

The origin and breending of the São Paulo cotton variety IAC 13-1, as well as the involved proceedings and numerical results are reported. The "eastern Acala" Acala 5675, selected at Knoxville, Tenn., from a Mexican cotton was introduced to São Paulo in 1950. It showed very good fiber qualities in the new environment. After nine years of acclimation and individual selection it...

Estudo de amostragens de capulhos em canteiros experimentais de algodão

The technological properties of cotton fibers, such as upper half mean length, length uniformity, strength, and Micronaire fineness, and other characteristics such as percent lint and weight of one boll were studied in relation to four sampling methods, to evaluate whether the usual sampling procedure from the medium third part of the peant is representative of all the plant. The...

Zinco em solos do estado de São Paulo I: zinco total

Determinations of total zinc, extracted with HF-HClO4, were carried out in 227 samples of 28 profiles of 14 soil units of the State of São Paulo, using the atomic absorption spectrophotometry. The amount of zinc found in the different soils was mainly determined by the zinc content of the soil forming material. In soils derived from basic igneous rocks, those richest in zinc, the...

Observações sobre o efeito da ventilação na qualidade de sementes de Pinus

Seeds of Pinus oocarpa and P. caribaea were subjected to ventilation in a "South Dakota" seed blower, and thus three samples were obtained, i.e., heavy light, plus the original. Several tests were conducted with these samples and the results indicate that a substantial improvement in the quality of Pinus seed can be experimented after this very simple processing operation.

Fineza e comprimento de fibra de dez variedades de rami

A study concerning the fineness and length of the following international varieties of ramie (Boehmeria nivea Gaud.) is reported: Saikeisheishin-Shun, London, Tatsutyama, Izu-Kairyo, Chiayi, Tsuannan n.° 2, Toakan, Kokuhi, E 49-63 and Tatsuka-Kairyo. This study was based on fibers obtained from ninety five to hundred three old stalks of the ramie varieties produced in the State...

Contribuição do porta-enxerto, no teor de cafeína em grãos de café

The contribution of the root-stock on the caffeine content of the coffee grains was studied in the Mundo Novo and Laurina cultivais of Coffea arabica and in the Rubosta cultivar of C. canephora which markedly differ in the alkaloid content. The results indicate that the root-stock, independently of its genotype, does not influence the caffeine content of the grains. Individual...

Estudo de materiais calcários usados como corretivos do solo no estado de São Paulo. IV - O poder relativo de neutralização total

The relative efficiency of limestones was calculated with data of CaO and MgO contents and of particle size distribution determined with sieves 10 and 50 (U.S.B.S.). The results of the 25 samples analysed varied between 52.3 and 93.8% CaCO3 equivalent, with an average of 66.9%.

Influência da adubação mineral NPK sobre a qualidade da semente de milho

Evaluation of possible effects of mineral nutrition on seed quality characteristics was made using seed of a permanent corn fertilization trial. The following determinations were made: 100 seeds weight, initial humidity content, germination percentage and vigor test (accelerated aging and first count). The first determination of germination percentage and first count was made...