SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Identificação e caracterização de alguns solos da Estação Experimental de Silvicultura Tropical do INPA

Ano: 1979

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000800023

Acta Amazonica

Alguns solos da Transamazônica na região de Marabá ()

Resumo No presente estudo, são identificados, caracterizados morfológica e analiticamente, nove solos sob experimentação agrícola, na Estação Experimental de Silvicultura Tropical do INPA, situada no Km 45 da BR-174, que liga Manaus a Boa Vista. As condições presentes nessa área caracterizam um regime de temperatura isohipertérmico e um regime de umidade údico. Os solos se enquadram em duas ordens: Ultissol e Oxissol. A ordem Ultissol apresenta-se com duas subordens: Humult com dois grandes grupos (Palehumult e Tropohumult) e Udult, com um grande grupo (Paleudult). A ordem Oxissol apresenta uma subordem (Orthox) com dois grandes grupos: Haplorthox e Acrorthox. Os solos, no Sistema Brasileiro de Classificação, enquadram-se nas seguintes classes: Podzólico...

Ano: 1980

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671980000100007

Acta Amazonica

Resumo No presente trabalho, são descritos seis solos que ocorrem ao longo da rodovia Transamazônica, num percurso de 31,4 km, entre o igarapé Vermelho e o rio Cajazeira, na vertente esquerda do rio Tocantins, Município de Itupiranga, Estado do Pará. As ordens de solos encontradas foram: Entissolos, Oxissolos e Ultissolos correspondendo a Solos Pouco Desenvolvidos, Latossolos e Solos Podzolizados, no Sistema Brasileiro de Classificação de Solos. Na área, houve predominância dos Oxissolos (65%), seguindo-se a estes os Entissolos (22%) e, finalmente, os Ultissolos com 13%. O mapa exploratório de solos do Projeto RADAM (1974) assinala para essa área a ocorrência da associação Podzólico Vermelho Amarelo e Latossolo Vermelho Amarelo Distrófico isto é, de...

Influência do cloro, sôbre a composição do caldo da cana de açúcar Co 290, aplicado no solo, na forma de cloreto de sódio

Ano: 1978

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978000300333

Moraes,J. Mello; Almeida,J. R.; Coury,T.; Gomes,F. Pimentel; Valsechi,O.; Ranzani,G.; Kiehl,E. J..

Considering the economic importance of the sugar industry among ourselves, the authors carried out a field experiment (Latin square) with Co 290 sugar cane, on a white sandy soil of Piracicaba, State of São Paulo, Brazil, applying NaCl in increasing rates (from 6.8 to 54.5 grams per plant), in order to study the effects of chlorides, on productivity and on the composition of juice. No toxic or stimulating effect was found, and there was no change in yield, in degree of purity of the juice, in general aspect of plants or in colour of leaves and culms. No difference was observed between potassium sulphate or chloride, as source of potash for sugar cane culture. Data collected and the literature cited suggest: (a) that the use of the variety Co 290 is...

As tortas de cacau e de algodão na adubação da cana

Ano: 1951

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761951000100008

Coury,T.; Malavolta,E.; Ranzani,G..

This paper deals with a field trial executed to compare cotton seed and cacau meals in the fertilization of sugar cane, variety Co290. The design chosen was a latin square of 6 x 6. The following conclusions can be drawn: 1. Cottonseed meal revealed to be statistically superior to cacau meal, being even superior to the mineral fertilizers plus cacau meal treatment. 2. From an economical point of view cotton seed meal, as a fertilizer for sugar cane, can not be substituted by cacau meal.

Consequências da aplicação do restilo ao solo(I)

Ano: 1953

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761953000100002

Sorbímetro (Um aparêlho para a determinação das relações solo/água)

Ano: 1956

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761956000100013

Ranzani,G.; Porta,A..

Os autores descrevem um aparelho destinado à medida contínua da água absorvida pela TFSA em condições de laboratório. O sorbímetro, cujo funcionamento obedece ao princípio dos vasos comunicantes, consta de um tubo em U cujos ramos verticais se ligam respectivamente à uma coluna de terra e à uma bureta de 100 ml. A bureta restabelece no tubo, a água absorvida pela terra. As leituras de bureta substituem as pesagens do método gravimétrico. O aparelho é recomendado para medidas a intervalos de tempo para os quais, o método usual é ineficiente.

Vinhaça e adubos minerais(I)

Ano: 1958

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761958000100001

Ranzani,G.; Brasil Sobr.,M. O. C. Do; Malavolta,E.; Coury,T..

In this paper it is studied the action of vinasse as compared to mineral fertilizers. Beans, corn, cotton and sesame were cultivated in randomized blocks receiving the following treatments: A = mineral fertilizers (N, P, K); V = vinasse at the rate of 1,000,000 liters per Ha; AV = mineral fertilizers + vinasse; T = control. Statistical analysis of the experiments has consistently revealed the superiority of vinasse either combined or not with the mineral fertilizers over the remaining treatments. There was no significant difference between V and AV which shows the surprizing role of vinasse when applied to light soils such as those employed in the present experiments. By employing 1,000,000 liters of vinasse to the hectare the following amounts of...

Curvas de titulação e capacidade tampão dos solos do estado de São Paulo: I - solos sôbre o arqueano, devoniano e glacial

Ano: 1953

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761953000100008

Competição entre adubos fosfatados em milho (Zea mays L)

Ano: 1952

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761952000100007

Malavolta,E.; Coury,T.; Ranzani,G.; Catani,R. A.; Brasil Sobr.,M.O. C.; Arruda,H. V. de.

This paper relates the results of an experiment designed to study the comparative effects of several phosphates applied to corn crops. The following phosphates were applied to a latin square of 6x6: Latif (a rock phosphate), fospal, superphosphate, fertifos, hiperfosfato and serranafosfato (a fusion phosphate). The nutrients were employd at the rates of 200 kg of N (as Chilean nitrate), 200kg of K2O (as muriate of potash) and 200 kg of P205. To correct the acidity and to improve the poor physical conditions of the sandy soil studied limestone (450 kg/Ha) and cotton seed meal (900 kg/Ha) were added to all plots; liming was made one month in advance to the planting. In the second year, in the same place, the split-plot technique was used: half plot received...

Caracterização de um solo da provincia de Mendes, Cantão Sella, Tarija - Bolivia

Ano: 1953

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761953000100009

Ranzani,G.; Lujan C.,J..

No presente trabalho os autores estudam um solo representativo da Província Mendez, Cantão Sella, da região sul da Bolivia. São analisadas as informações disponíveis sobre o clima, geologia, relevo e uso agrícola dessa terra. Foram obtidos resultados morfológlcos e analíticos do solo e com base nestas informações foi elaborada a classificação do solo ao nível de família. O solo apresentou epipedon ócrico, horizonte argílico, carbonatos antigênicos caracterizando um horizonte cálcico e um horizonte petrocálcico subjacente. A classe de tamanho das partículas, a natureza mineralógica e a classe de temperatura, permitiram classificar o solo como: Ordem: Aridisol Subordem: Argid Grande grupo: Paleargid Sub grupo: Petrocalcic Ustalfic Paleargid Família:...

Experiências de adubação mineral e orgânica com Capim Kikuyu (Pennisetum clandestinum Hochst.)

Ano: 1974

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761974000100019

Coury,T.; Torres,A. P.; Ranzani,G..

Kikuio grass (Pennisetum clandestinum Hochst) is beyond any doubt, a pasture very important for farm animals; since its chemical composition is very similar to that of alfalfa, the present field trial was carried out; a randomized block design with 8 treatments was selected as follows: 1 N - P - K - Ca - Mg (complete manuring) 2 N - P - K - Ca----- (without Mg) 3 N - P - K-------Mg (without Ca) 4 ----P - K - Ca - Mg (without N) 5 N------K - Ca Mg (without P) 6 N - P - Ca - Mg (without K) 7 organic matter (without mineral fertilizers) 8 control Nitrogen was applied as NaN03 (topdressed) and as ammonium sulfate; P2O5 was given as superphosphate associated to bonemeal; K2O was applied as muriate, CaO as "sambaquis" (oyster shells); MgO was given as MgSO4...

Contribuição ao estudo do «vermelhão» do algodoeiro (Gossipium herbaceum)

Ano: 1956

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761956000100004

Coury,T.; Malavolta,E.; Ranzani,G.; Brasil Sobrinho,M. O. C. do.

During the years 1948, 1949 and 1951 a disease occurred in the cotton crops of the state of S. Paulo Brazil (S. Am.), which caused a severe drop in yields. The abnormality was characterized by a typical reddish - purple color of the leaves, being by this reason, called "vermelhão", that is, reddening of the cotton plant. The disease was associated with a dry season. Among the several hypotheses raised to explain the causes of the disease were: insect attack, potassium deficiency - where from the name "potash hunger" was also given -, and magnesium deficiency: In order to study the problem the Department of Agricultural Chemistry of the College of Agriculture of the University of São Paulo, at Piracicaba, carried out a series of experiments as follows: 1....

Estudos sobre o «vermelhão» do algodoeiro (III)

Ano: 1954

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761954000100001

Coury,T.; Ranzani,G.; Malavolta,E.; Brasil Sobrinho,M. O. C. do.

In several cotton crops areas of the State of S. Paulo it was observed, during the years of 1948, 1949, and 1951, the appearance of a purple color of the leaves; the color appears in the opening of the bolls and was correlated with a decrease of production. The opinions concerning the cause of such abnormality were very different and sometimes contradictory; certain investigators attributed the disease to insect attack, others to bad climatic conditions whereas others to a potassium deficiency now called "fome de potássio" (potash hunger); our ideas on the subject is another one. We think that the disease is caused by lack of a suitable supply of magnesium. This opinion is largely based on the syntomatology found in the literature. To study the problem,...