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      Levantamento pedológico da estação experimental de Pindamonhangaba Translated title: A soil survey of the Pindamonhangaba agr. Exp. Sta

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          Abstract

          No presente trabalho são estudados, classificados e delimitados os solos da Estação Experimental de Pindamonhangaba. Êsse campo experimental possui uma área de 226 hectares, ou 93,9 alqueires paulistas, dedicando-se a pesquisas agrícolas. Os solos estão classificados em séries monotípicas ou tipos de solo, grande grupo, subordem e ordem, segundo a classificação climática. Acompanham cada série descrições morfológica e genética, bem como principais propriedades físicas e químicas. A fertilidade foi analisada somente pelas propriedades químicas de amostras compostas, colhidas em locais diversos dentro da Estação Os solos zonais, da subordem Latossolo, de boa drenagem, compreendem as séries Pinhão, Pinda, Polêmica e Ponte Alta, e os moderadamente drenados estão definidos pelas séries Guatemala e Gleba. Na categoria de intrazonais são encontrados os grandes grupos Glei Pouco Húmico (série Mosqueada) e o Glei Húmico (série Estação). A eerie Dourada é a única que se enquadra no grande grupo Aluvião, da ordem azonal.

          Translated abstract

          A detailed soil survey of lhe Paraíba Valley (Taubaté basin) is being carried on as a cooperative project between the Instituto Agronômico, Campinas, and the Serviço do Vale do Paraíba. As a part of this project, a soil survey of the Pindamonhangaba Agr, Exp. Sta. (226 hectares) was made, the results of which are reported in this paper. The soils were classified in monotype series or soil types, Great Soil Group, sub-order, and order, according to the climatic classification. The fertility problems were studied on the basis of composile soil samples several site of the slatian. The zonal soils belong to the sub-order Latosol and were defined in soil types Pinhão, Pinda. Polêmica, and Ponte Alta, as well drained soils, and Guatemala and Gleba as moderately drained ones. As intraional soils was the Mosqueada series present, defined as Low Humíc Gley and Estação Series as Humic Gley. The Dourada Series (soil type) is an alluvial soil with clay texture and enters as azonal soil.

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            A new method for the concentration of Cryptosporidium oocysts from water.

            A novel method for the concentration of Cryptosporidium oocysts from water has been developed, based upon the precipitation of calcium carbonate. A 10 l water sample is treated by adding solutions of calcium chloride and sodium bicarbonate and raising the pH value to 10 with sodium hydroxide. Crystals of calcium carbonate form and enmesh particles in the Cryptosporidium oocyst size range. The crystals are allowed to settle, the supernatant fluid is discarded and the calcium carbonate precipitate dissolved in sulphamic acid. The sample can be concentrated further by centrifugation. Recoveries of oocysts from seeded samples of deionized, tap and river water were in excess of 68%.
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              Contribuição para o estudo do clima no Estado de São Paulo

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                brag
                Bragantia
                Bragantia
                Instituto Agronômico de Campinas (Campinas )
                1678-4499
                1960
                : 19
                : unico
                : 838-849
                Affiliations
                [1 ] Instituto Agronômico Brazil
                [2 ] Serviço do Vale do Paraíba
                Article
                S0006-87051960000100052
                10.1590/S0006-87051960000100052
                52d78068-64da-4008-b058-eb5e756a33e1

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0006-8705&lng=en
                Categories
                AGRICULTURE, MULTIDISCIPLINARY

                General agriculture
                General agriculture

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