Anais da Escola Superior de Agricultura Luiz de Queiroz

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List of Papers (Total 103)

Efeitos do arsênico sôbre a cultura do algodoeiro em terra arenosa

The authors studied the action of arsenic, in the form of lead arsenate and sodium arsenite, on cotton in white sandy soil of Piracicaba, State of S. Paulo, Brazil. The experiment was carried out in Mitscherlich pots, applying increasing quantities of the above mentioned compounds. The following conclusions were reached: sodium arsenite is more toxic than lead arsenate. 48 pounds...

A ração úmida no crescimento dos pintos

The author reports in this paper the results obtained in one experiment with wet an dry mash on the growing of chickens. The experiment started with two groups of 50 Sussex bred each, one receiving dry and other wet mash. The observations were continued in another four groups of 25 chickens each, two of Rhod Island Red bred and two of Sussex bred, both receiving dry and wet mash...

III - A ocorrência das células anexas dos estômatos na família Rubiaceae

In the present paper the author gives the final results of his studies about the significance of the two annex cells of the stomata of the Rubiaceae as anatomical family character, part of which has been previously published. After having verified that in the Order Rubiales the Family Rubiaceae is the unique to show stomata provided with two annex cells differing in size and...

Raça de galinhas "piracicaba

The characters naked neck and black plumage proved to be due to single genes in a group of chicks growing at the Poultry Department of "Luiz de Queiroz" School of Agriculture, Piracicaba, Brasil. The two characters segregate independently and the animals with known genetical constitution will be used in the formation of a local breed.

Meiose em Rhinocricus Padbergi Verhoeff, 1938

In the present paper the behaviour of the chromosomes in the spermatogenesis of the Myriapod Rhinocricus Padbergi Verhoeff, 1938 is studied. The primary spermatocytes are provided with 10 independent bivalents which separate normally giving rise to equivalent secondary spermatocytes. No indication of sex chromosomes has been found. Fusion of two bivalents or of four, two by two...

Pequena contribuição à história natural de alguns Fringillidae do Brasil (Passeriformes)

A short contribution to the Natural History of some Brazilian Frigillidae The following species of Brazilian Fringillidae are mentioned here, the first of which being more deeply studied: 1 - Oryzoborus angolensis angolensis (Linnaeus). 2 - Oryzoborus crassirostris maximiliani Cabanis. 3 - Cyanocompsa cyanea sterea Oberholser. 4 - Coryphospingus cucullatus rubescens (Swainson...

O brix na determinação da riqueza em açúcares do mamão como auxiliar no melhoramento do mamoeiro (Carica papaya L.)

There is in the literature a noteworthy lack of sampling methods to be employed in the selection of papaya fruits for genetical improvement purposes. In the present experiment methods applied to melon and watermelon were extended to papaya with good results. The authors tried to correlate the solids content-as determined by a hand refractometer-with total sugars in the fruit. The...

Toxicidade de algumas crotolárias

This paper deals with some testes of Crotalaria as forage, using rabbits as laboratory animals to detect toxicity, at Piracicaba, São Paulo, Brazil. 1. C. intermedia and C. juncea were palatable, non toxic, the last more productive. Tests on cattle are recommended and selection to improve characteristics as forage too. 2. C. incana and C. verrucosa were little palatable, probably...

Sôbre a ocorrência de um órgão cupuliforme, com bordos pelíferos, no colo dos «Seedlings» de Eucalyptus

With this paper the author concludes a series of studies he began in 1941; the work deals with a cupuliform organ, with hairy margins, located in the junction of radicle and hypocotyl of seedlings of 105 species of Eucalyptus. It was found out that in the embryo the organ looks like a ring placed on the end of the hypocotyl; for this reason one my led to consider the organ at...

Sôbre uma fórmula para o cálculo da dose mais econômica de adubo

The authors discuss a formula for the determination of the most profitable level of fertilization (x*). This formula, presented by CAREY and ROBINSON (1953), can be written as: x*= (1/c) log cxu L10 + (1/c) log wu                  _______               ___                   1-10                 xut being c the growth factor in Mitscherlich's equation, xu a standard dressing of...

A absorção de nitrogênio, fósforo, potássio, cálcio, magnésio, enxôfre e silício pela cana de açúcar, Co 419, e o seu crescimento em função da idade

This paper describes the data obtained for the growth of sugar cane, Variety Co 419, and the amount and rate of absorption of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, and silicon, according to the age of the plant, in the soil and climate conditions of the state of S. Paulo, Brazil. An experiment was installed in the Estação Experimental de Cana de Açúcar "Dr...

O regime de chuvas em Pesqueira

The authors studied the rainfall in Pesqueira (Pernambuco, Brasil) in a period of 48 years (1910 through 1957) by the method of orthogonal polynomials, degrees up to the fourth having been tried. None of them was significant, so that it seems that no trend is present. The mean observed was 679.00 mm., with standard error of the mean 205.5 mm., and a 30.3% coefficient of variation...

Fórmulas diretas de Ansheles

The "direct formulas" by Professor Ansheles, a Russian crystallographer, are published, without deduction, in the Crystallography by BOLDYREV, (1934), translated into Spanish by Candel Vila. In the present work the author deduces such formulas, using the stereographic projection.

Verificação da adaptação à galactose e à maltose de células de Saccharomyces carlsbergensis

Cells of Saccharomyces carlsbergensis growing in medium DPE and with glucose, or galactose, or maltose have different fermenting capacities for galactose, maltose and raffinose. From these observations we can considered that they have as constitutive enzymes maltase, galactosidase and galactowaldenase.

Estudo do grande pulgão da roseira Macrosiphum rosae (L., 1758) (Homoptera, Aphididae)

Rose aphid, Macrosiphum rosae (L., 1758), a very common aphid in State of São Paulo, Brazil, is studied in this paper.

A precipitação do estrôncio na forma de cromato em meio amoniacal e hidroalcoolico

This paper describes the data obtained concerning qualitative and quantitative analyses of the precipitate formed when to a solution containing strontium ion are added potassium dichromate, ammonium hydroxide and 95 per cent alcohol. Three replications of standard solution containing 1.8, 4..4, 8.8, 13.7, 27.5, 41.2, and 50.5 mg of strontium were treated with potassium dichromate...

Ainda sôbre as "fórmulas diretas

The "direct formulas" by Ansheles, previously deduced by the author through the stereographic projection, are now deduced by means of a different way, especially with the help of the gnomonic projection.

Sôbre a fórmula: cosa . cosb. cosc + senb. senc. cos A

Using the gnomonic projection, the author presents a deduction of the general formula to solve spherical triangles.

A separação do Cálcio de Estroncio mediante o emprego de Resina Trocadora de Íons e de Estroncio Radioativo Sr-89

A simple, rapid and efficient method of separation of strontion from calcium can be perfomed by using a solution of 2.5% NH4- EDTA, with pH adjusted to 4.80 to dissolve those cations. After, the solution is passed through a 25-28 ml column of the Amberlite 1R-120 (4+) cation exchange resin. Strontinum is quantitatively retained on the resin, while calcium passes through. After...

Método do EDTA na determinação do cálcio e magnésio "trocável

This paper describes the determination of exchangeable calcium and magnesium in soil by using ethylenediamine tetracetic acid, after the separation of the principals interferents (iron, aluminum, manganese and phosphate) by using both ammonium hidroxide and ammonium sulfide in only one operation. In order to compare the chelometric and the permanganometric methods for determining...

Estudos sobre a alimentação mineral do cafeeiro: XII. efeito da adubação na composição mineral das fôlhas

Leaf samples from coffee plants under three different fertilizations, namely NPK, NP and PK, were collected for chemical analysis. It was found that the contents of N, K, Ca, Mg and S in the first, second, third and fourth pair of leaves were the same from the statistical point of view. On the onder hand, there was a significant effect of the position of the leaf in the branch on...

Sôbre a bacteriologia de águas piracicabanas

Working with 29 samples of surface and depth water, raw or treated, using the Standard Methods for Examination Water and Sewage of American Public Health Association was found that 26 samples show contamination by entero-bacteria (coli-aerogenes), or Clostridium. This proved that 82% of samples of water which were analysed were not safe for use as potables or for irrigation of...

Contribuição para o conhecimento de duas espécies de cupim do Vale do Paraíba (Estado de São Paulo)

In this paper, some notes on the termites Cornitermes bequaerti Emerson, 1952 and Syntermes silvestrii Holmgren, 1911, that are found in Vale do Paraíba, State of São Paulo, Brazil, are presented.

Determinação de cálcio e magnésio em plantas, pelo método do EDTA

The present work reports a study of the chelatometric method (by EDTA titration) for determining calcium and magnesium in plant materials. A preliminary study about the influence of severals íons (Fe3 +, PO43 -, Al3 +, SO42 - and Mn2+) was performed. The presence of sulfate and aluminum did not cause interference in the method. Manganese (200 micrograms) interferes by causing the...