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Composition of brazilian phosphate rocks used for cattle feed supplement. Author(s): VIEIRA, E. C.; MORAES, S. D. S.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. Pbospbate rocks cünstitute lhe bulk of the raw materiaIs for the manufacture fertilizers and some phosphorus b-ased chemicals. !t is well known that natural pbosphate a great varíation of heavy melaIs... ... Repository: BDPA Publication year: 2004
Gamma-ray spectrometry for distinguishing acid and basic rocks of the serra geral formation, in the serra gaúcha wine region, Brazil. Author(s): MODENA, R. C. C.; HOFF, R.; FARIAS, A. R.; VIEL, J. A.; COELHO, O. G. W. The gamma-ray spectrometric research has allowed for observation of the distribution of radioactive elements such as K, U and Th for recognizing the radioactive signatures of different rock types. The... ... Repository: BDPA Publication year: 2016
Long term experiments with reactive phosphate rocks for grain crops in Cerrado soils. Author(s): SOUSA, D. M. G. de; REIN, T. A.; NUNES, R. de S.; SANTOS JUNIOR, J. de D. G. dos Repository: BDPA Publication year: 2014
Characterization and nutrient release from silicate rocks and influence on chemical changes in soil. Author(s): SILVA, D. R. G.; MARCHI, G.; SPEHAR, C. R.; GUILHERME, L. R. G.; REIN, T. A.; SOARES, D. A.; ÁVILA, F. W. Repository: BDPA Publication year: 2012
HYPROP measurements of the unsaturated hydraulic properties of a carbonate rock sample. Author(s): LIPOVETSKY, T.; ZHUANG, L.; TEIXEIRA, W. G.; BOYD, A.; PONTEDEIRO, E. M.; MORICONI, L.; ALVES, J. L. D.; COUTO, P.; VAN GENUCHTEN, M. TH. The unsaturated hydraulic properties provide important theoretical and practical information about fluid flow in soils and rocks for a range of soil, environmental and engineering applications. In thi... ... Repository: BDPA Publication year: 2020
Weathering of metamorphic rocks and formation of planosols in semi-arid environment, Brazil. Author(s): SOUZA JUNIOR, V. S. de; NEVES, L. V. de M. W.; SANTOS, J. C. B. dos; ARAUJO FILHO, J. C. de; CORREA, M. M.; SILVA, L. F. I. da The objective of this work was study the evolution of the weathering front in gneiss saprolites (felsic rocks) in two profiles of Planosols under different levels of severity of degradation (point 1 i... ... Repository: BDPA Publication year: 2019
Biological solubilization of phosphate rock by solidstate cultivation to produce eco-friendly fertilizers. Author(s): KLAIC, R.; GAVA JUNIOR, M.; RIBEIRO, C.; FARINAS, C. S. The objective of this work was to evaluate the solubilization of phosphorus from a phosphate rock by Aspergillus niger, under solidstate cultivation (SSC) in sugarcane (Saccharum officinarum) bagasse,... ... Repository: BDPA Publication year: 2021
Soil associated with rock outcrops in the Brazilian mountain ranges Mantiqueira and Espinhaço. Author(s): BENITES, V. de M.; SCHAEFER, C. E. G. R.; SIMAS, F. N. B.; SANTOS, H. G. dos Espinhaço and Mantiqueira are two mountain ranges of great importance in Brazil. In the uppermost parts of these areas, unique ecosystems occur, generally associated with rock outcrops, they are colle... ... Repository: BDPA Publication year: 2007
Silicate rocks as an alternative potassium fertilizer for upland rice and common bean crops. Author(s): SORATTO, R. P.; CRUSCIOL, C. A. C.; CAMPOS, M. DE; COSTA, C. H. M. DA; GILABEL, A. P.; CASTRO, G. S. A.; FERRARI NETO, J. ABSTRACT - The objective of this work was to evaluate the efficiency of molten and ground alkaline potassium-silicate rocks (K1) and of ground phonolite rock (K2) as sources of potassium for upland ri... ... Repository: BDPA Publication year: 2021
Rock phosphate solubilizing microorganisms isolated from maize rhizosphere soil. Author(s): GOMES, E. A.; SILVA, U. de C.; MARRIEL, I. E.; OLIVEIRA-PAIVA, C. A.; LANA, U. G. de P. ABSTRACT - The selection of microorganisms capable of solubilizing phosphorus (P) from rock phosphates (RP) may contribute to reduce the dependence of imported fertilizers in grain crops, reducing the... ... Repository: BDPA Publication year: 2014

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