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1. Development of anammox process for animal waste treatment: experiences in Brazil

Author:
Kunz, Airton; Vanotti, Matias; Szogi, Ariel; Garcia, Mari Cruz; Schierholt Neto, Guilherme Francisco; Soares, Hugo Moreira
Source:
International Symposium on Air Quality and Waste Management for Agriculture : proceedings of the 16-19 September 2007 conference, Broomfield, Colorado pp. -
Subject:
wastewater treatment; animal manure management; anaerobic conditions; ammonia; oxidation; immobilized cells; bacteria; nitrogen; nitrification; denitrification; swine; waste lagoons; sediments; biomass; duration; resins; bioreactors; pig manure; Brazil
Abstract:
... The isolation of anaerobic ammonium oxidation (anammox) bacteria adapted to animal wastewater environments can be of significant importance to farming systems, because excess ammonia in modern, industrial-type livestock production is a global problem, and the use of conventional biological nitrogen (n) removal methods is usually hindered by cost; thus, we think that the more economical anammox bas ...
Handle:
10113/45572

2. Evaluation and integration of a color infrared digital camera system into forest health protection programs in the western United States, Southern Brazil, and Anhui Province, China

Author:
Knapp, K. Andrew; Disperati, Attilio; Sheng, Zhou Jian
Source:
Natural resource management using remote sensing and GIS : proceedings of the Seventh Forest Service Remote Sensing Applications Conference, Nassau Bay, Texas, April 6-10, 1998 / Jerry Dean Greer, editor pp. -
Subject:
remote sensing; digital images; image analysis; aerial photography; insect pests; plant parasitic nematodes; forest pests; forest health; coniferous forests; forest plantations; Pinus; forest trees; Brazil; China; Idaho
Handle:
10113/39957

3. Jaguars, livestock, and people in Brazil: realities and perceptions behind the conflict

Author:
Cavalcanti, Sandra M.C.; Marchini, Silvio; Zimmermann, Alexandra; Gese, Eric M.; Macdonald, David W.
Source:
Biology and conservation of wild felids / edited by David Macdonald and Andrew Loveridge pp. -
Subject:
Panthera onca; livestock; humans; predators; predation; human-wildlife relations; wildlife-livestock relations; perceptions (cognitive); wildlife food habits; Brazil
Handle:
10113/44022

4. Some Brazilian problems in agronomy

Author:
Hunnicutt, B.H.
Source:
Agronomy journal 1913 v.5 no.1 pp. 34-38
ISSN:
0002-1962
Subject:
grain crops; agronomy; climatic factors; edaphic factors; agricultural education; agricultural outlook and situation; Brazil
DOI:
10.2134/agronj1913.00021962000500010004x

5. Brazilian agriculture

Author:
Carlson, F.A.
Source:
Agronomy journal 1925 v.17 no.11 pp. 725-730
ISSN:
0002-1962
Subject:
agriculture; crop production; geographical distribution; animal production; Brazil
DOI:
10.2134/agronj1925.00021962001700110010x

6. Analyses of Several Brazilian Soils in Relation to Plant Responses to Sulfur

Author:
A. C. McClung; L. M. M. de Freitas; W. L. Lott
Source:
Soil Science Society of America journal 1959 v.23 no.3 pp. 221-224
ISSN:
0361-5995
Subject:
B horizons; ammonium acetate; calcium sulfate; dry matter accumulation; greenhouse experimentation; highlands; intensive cropping; millets; plant response; pot culture; savannas; sulfur; virgin forests; virgin soils; Brazil
Abstract:
... Greenhouse studies indicated many soils of the central plateau of Brazil to have a poor S supply. The most acute deficiency was found on soil from an upland savanna, but surface soils (0 to 20 cm. A₀ excluded) from virgin forests also responded. The B horizon of cultivated soils responded less frequently than that of the virgin soils, suggesting some downward movement of S under cropping. Such mov ...
DOI:
10.2136/sssaj1959.03615995002300030020x

7. Modification of Fitness in Species and Strains of Flour Beetles due to X‐Ray and DDT

Author:
Howard E. Erdman
Source:
Ecology 1966 v.47 no.6 pp. 1066-1072
ISSN:
0012-9658
Subject:
DDT (pesticide); Tribolium confusum; X-radiation; adults; biomass; copper; females; filtration; insecticides; ionization; males; mor; mortality; sterilizing; Brazil
Abstract:
... Insecticides and ionizing radiations can induce population changes which under selection are beneficial or harmful. Such changes are known in some cases to have a genetic basis. Studies were designed to determine the early effects of DDT and x—radiation, singly and in combination, on mortality and productivity of flour beetle species and strains (Tribolium confusum Duval "Chicago standard" and T. ...
DOI:
10.2307/1935659

8. Reaction of Peanuts to Dry and Wet Growing Periods in Brazil

Author:
W. H. Wessling
Source:
Agronomy journal 1966 v.58 no.1 pp. 23-26
ISSN:
0002-1962
Subject:
agronomy; dry season; peanuts; rain; temperature; wet season; Brazil; Virginia
Abstract:
... Reactions of Spanish-Valencia, Virginia bunch, and runner peanut varieties and strains to wet and dry growing periods were studied during three growing seasons, 1959 to 1962, in the western part of the State of Sao Paulo, Brazil. During the three wet seasons Spanish—Valencia peanuts made better use of excess moisture at high temperatures than did the other two groups. Virginia bunch and runner var ...
DOI:
10.2134/agronj1966.00021962005800010008x

9. An Empirical Study of the Agricultural Labor Market in a Developing Country, Brazil

Author:
Russell Youmans; G. Edward Schuh
Source:
American journal of agricultural economics 1968 v.50 no.4 pp. 943-961
ISSN:
0002-9092
Subject:
agricultural industry; developing countries; empirical research; farm labor; farms; labor market; production functions; wage rates; Brazil
Abstract:
... Underemployed agricultural labor implies a poorly functioning labor market. The allocative efficiency of the labor market in the Brazilian state of Minas Gerais is evaluated by estimating agricultural production functions for five regions within the state, estimating the MVP of labor, and comparing this with the MVP of labor in other regions and other sectors of the economy, and with wage rates in ...
DOI:
10.2307/1237631

10. Ecological Relations of Three Atta Species in Panama

Author:
Neal A. Weber
Source:
Ecology 1969 v.50 no.1 pp. 141-147
ISSN:
0012-9658
Subject:
Atta; Myrmicocrypta; Sericomyrmex; buildings; clay; climate change; colon; ecotones; foraging; forests; grasslands; habitats; islands; leaf-cutting ants; nesting; nests; sandy soils; Argentina; Arizona; Brazil; Guyana; Louisiana; Panama; Texas; Uruguay; Venezuela
Abstract:
... Of the three Atta species of Panama (sexdens L., cephalotes isthmicola Weber and colonzbica tonsipes Santschi), sexdens is a grassland species as it is in South America, and the other two are forest or forest‐grassland ecotone species. While sexdens and tonsipes may nest in the same general grassy area, sexdens extends along the sandy Pacific shore, and the other two nest primarily in clay. A uniq ...
DOI:
10.2307/1934676

11. Effect of Plant Age and Nitrogen Fertilization on the Chemical Composition and In Vitro Cellulose Digestibility of Tropical Grasses

Author:
J. A. Gomide; C. H. Noller; G. O. Mott; J. H. Conrad; D. L. Hill
Source:
Agronomy journal 1969 v.61 no.1 pp. 116-120
ISSN:
0002-1962
Subject:
Cenchrus clandestinus; Cenchrus purpureus; Cynodon dactylon; Digitaria; Megathyrsus maximus; Melinis minutiflora; agronomy; cellulose; crude fiber; crude protein; dry season; nitrogen; nitrogen fertilizers; pH; plant age; rain; sandy loam soils; summer; tropical grasses; wet season; Brazil
Abstract:
... This study was conducted in the state of Minas Gerals, Brazil, on a sandy loam soil low in fertility and a pH of 5.1. The mean monthly rainfall ranged from near zero during the 5- to 6-month winter dry season and up to 330 mm in the mid-summer wet season. The percentages of dry matter, crude protein, cellulose, crude fiber, and in vitro digestibility were determined on six tropical grass species: ...
DOI:
10.2134/agronj1969.00021962006100010039x

12. Mineral Composition of Six Tropical Grasses as Influenced by Plant Age and Nitrogen Fertilization1 2

Author:
J. A. Gomide; C. H. Noller; G. O. Mott; J. H. Conrad; D. L. Hill
Source:
Agronomy journal 1969 v.61 no.1 pp. 120-123
ISSN:
0002-1962
Subject:
Cenchrus clandestinus; Cenchrus purpureus; Cynodon dactylon; Digitaria eriantha; Megathyrsus maximus; agronomy; cattle; mineral content; nitrogen; nitrogen fertilizers; plant age; sandy loam soils; zinc; Brazil
Abstract:
... This study was conducted in central Brazil on a sandy loam soil which under normal conditions receives no fertilizer. The K, P, Ca, Mg, Cu, Mn, Fe, and Zn contents were determined on six grasses: Meilinis minutiflora Beauv., Digitaria decumbens Stent., Pennisetum purpureum Schum., Pennistetum clandestinumHochst., Cynodon dactylon Pers., and Panicum maximum Jacq. var. ‘Gondlyodes Doell’ Significant ...
DOI:
10.2134/agronj1969.00021962006100010040x

13. Patterns of evolutionary and geographical distribution in neotropical orchids

Author:
BRIEGER, F.G.
Source:
Biological journal of the Linnean Society 1969 v.1 no.1-2 pp. 197-217
ISSN:
0024-4066
Subject:
Cattleya; Oncidium; analysis of variance; biogeography; evolution; flowers; genetic variation; geographical distribution; phenotypic variation; taxonomy; temperate zones; tropics; Brazil; Peru; Venezuela
Abstract:
... Tropical material offers special advantages for the study of evolution, since the evolutionary process has progressed in a more continuous form than in the north temperate region, not having been seriously interrupted by glaciations, nor being restricted in space. The members of the orchid family offer special advantages (a) since the family is one of the largest and probably a most recent one phy ...
DOI:
10.1111/j.1095-8312.1969.tb01819.x

14. Why Don't Boblinks Breed in Brazil?

Author:
William M. Hamner; John Stocking
Source:
Ecology 1970 v.51 no.4 pp. 743-751
ISSN:
0012-9658
Subject:
beak; birds; body weight; color; gametogenesis; latitude; lighting; males; molting; photoperiod; summer; testes; Brazil
Abstract:
... The Bobolink, Dolichonyx oryzivorus, experiences two sets of "long" and "short" days each year during the transequatorial migration between North and South America. Increasing daylength normally stimulates gametogenesis in birds, and thus it is perplexing that Bobolinks do not also respond to the southern summer and attempt to breed in Brazil. Previous hypotheses regarding transequatorial migratio ...
DOI:
10.2307/1934060

15. Identification and quantitation of several nonvolatile organic acids of cocoa beans

Author:
Weissberger, W.; Kavanagh, T.E.; Keeney, P.G.
Source:
Journal of food science 1971 v.36 no.6 pp. 877-879
ISSN:
0022-1147
Subject:
gluconic acid; malic acid; mass spectrometry; lactic acid; capillary gas chromatography; tartaric acid; Theobroma cacao; cocoa beans; extraction; citric acid; succinic acid; quantitative analysis; phosphoric acid; provenance; oxalic acid; chemical composition; seed extracts; geographical variation; ethers; water; trimethylamine; Mexico; Dominican Republic; New Guinea; Ghana; Ecuador; Trinidad and Tobago; Brazil; Samoa

16. Electrochemical Properties of Some Oxisols and Alfisols of the Tropics

Author:
Bernardo Van Raij; Michael Peech
Source:
Soil Science Society of America journal 1972 v.36 no.4 pp. 587-593
ISSN:
0361-5995
Subject:
A horizons; Alfisols; Oxisols; calcium chloride; electrical charges; electrochemistry; ionic strength; ions; magnesium sulfate; models; oxides; protons; titration; tropics; Brazil
Abstract:
... A study of the distribution of the electric charges in the Ap and B2 horizons of two highly weathered Oxisols and one Alfisol from Brazil was made by means of potentiometric titration and by direct measurement of adsorption of ions in the presence of varying concentration of electrolyte. The titration curves at different ionic strengths crossed at the common point of intersection, the zero point o ...
DOI:
10.2136/sssaj1972.03615995003600040027x

17. Implication of Bacillus subtilis in the synthesis of tetramethylpyrazine during fermentation of cocoa beans

Author:
Zak, D.L.; Ostovar, K.; Keeney, P.G.
Source:
Journal of food science 1972 v.37 no.6 pp. 967-968
ISSN:
0022-1147
Subject:
chocolate; flavor; cocoa beans; fermentation; starter cultures; Bacillus subtilis subsp. subtilis; biosynthesis; pyrazines; flavor compounds; quantitative analysis; Brazil; Trinidad and Tobago

18. Implication of Bacillus subtilis in the synthesis of tetramethylpyrazine during fermentation of cocoa beans

Author:
Zak, D.L.; Ostovar, K.; Keeney, P.Q.
Source:
Journal of food science 1972 v.37 no.6 pp. 967-968
ISSN:
0022-1147
Subject:
cocoa beans; fermentation; starter cultures; Bacillus subtilis subsp. subtilis; biosynthesis; pyrazines; flavor compounds; odor compounds; sensory properties; Brazil; Trinidad and Tobago
DOI:
10.1111/j.1365-2621.1972.tb03717.x

19. Social Rates of Return and Other Aspects of Agricultural Research: The Case of Cotton Research in São Paulo, Brazil

Author:
Harry W. Ayer; G. Edward Schuh
Source:
American journal of agricultural economics 1972 v.54 no.4_Part_1 pp. 557-569
ISSN:
0002-9092
Subject:
Gossypium; agricultural economics; agricultural research; cotton; cottonseed; economic impact; employment; exports; issues and policy; landowners; prices; research and development; wage rates; Brazil
Abstract:
... Economic impacts of investments in cotton seed research and development in São Paulo, Brazil, are estimated. The internal rate of return to Brazilian society is estimated to have been approximately 90 percent. The effect on export earnings was large, and consumers benefited via a decrease in the price and an increase in the quantity of cotton cloth. Of total net benefits producers captured about 6 ...
DOI:
10.2307/1238532

20. Agriculture's Place in the Environment: Considerations for Decision Making

Author:
Willard H. Garman
Source:
Journal of environmental quality 1973 v.2 no.3 pp. 327-333
ISSN:
0047-2425
Subject:
air; algae; aquatic plants; bacteria; carbon dioxide; coal; decision making; effluents; energy; eutrophication; farms; fertilizers; industrial wastes; nitrates; nutrients; oils; organic matter; oxygen; photosynthesis; runoff; sewage; shorelines; soil; surface water; symbiosis; wildlife; Africa; Brazil; Canada; Siberia; United States
Abstract:
... Chemical elements at or near the earth's surface and in the air are in a continuing state of movement or subject to forces which can cause movement. The outstanding characteristic is that outgo of inorganic elements (including plant nutrients) from land to water greatly exceeds input over most land surfaces of the earth. Nutrients have been accumulating under water along the shorelines of the worl ...
DOI:
10.2134/jeq1973.00472425000200030002x

21. Costs and Returns of Education in Five Agricultural Areas of Eastern Brazil

Author:
George F. Patrick; Earl W. Kehrberg
Source:
American journal of agricultural economics 1973 v.55 no.2 pp. 145-153
ISSN:
0002-9092
Subject:
agricultural development; agricultural economics; agricultural land; costs and returns; education; equations; farm surveys; modernization; value added; Brazil
Abstract:
... This study tests the hypothesis that education has a major role in agricultural development by estimating costs and returns of schooling and extension in areas at various modernization levels. Public and private costs are estimated from secondary information and farm surveys. Value‐added and auxiliary equations, estimated from farm‐level data, are used to derive annual returns of education. Althou ...
DOI:
10.2307/1238431

22. Cost‐Benefit Analysis of Irrigation Projects in Northeastern Brazil

Author:
William R. Cline
Source:
American journal of agricultural economics 1973 v.55 no.4_Part_1 pp. 622-627
ISSN:
0002-9092
Subject:
agricultural economics; capital; cost benefit analysis; employment; irrigation; labor; linear programming; prices; Brazil
Abstract:
... Cost‐benefit analysis using empirical estimation of labor's shadow price and linear programming for crop selection is applied to major proposed irrigation projects for Brazil's Northeast. Over half the project area is approved. However, these capital intensive projects should rank below investments with similar rates of return but larger employment effects. ...
DOI:
10.2307/1238348

23. Returns to Scale and Input Elasticities for Sugarcane: The Case of Sao Paulo, Brazil

Author:
Reinaldo Alcantara; Anthony A. Prato
Source:
American journal of agricultural economics 1973 v.55 no.4_Part_1 pp. 577-583
ISSN:
0002-9092
Subject:
agricultural economics; elasticities; equipment; fertilizers; labor; pesticides; production functions; sugarcane; Brazil
Abstract:
... Returns to scale and input elasticities are estimated from cost functions based on standard and generalized Cobb‐Douglas production functions. Returns to scale increased up to 161 thousand tons and decreased thereafter. Elasticities were. 340 for labor, .285 for land, .351 for fertilizer, .113 for pesticides, and —.089 for machinery and equipment. ...
DOI:
10.2307/1238342

24. Alternative Measures of Supply Elasticities: The Case of São Paulo Coffee

Author:
R. Gerald Saylor
Source:
American journal of agricultural economics 1974 v.56 no.1 pp. 98-106
ISSN:
0002-9092
Subject:
agricultural economics; supply elasticities; Brazil
Abstract:
... Nerlovian supply functions are fitted to post‐World War II coffee data for São Paulo, Brazil. Supply shifts are permitted through the use of dummy variables, and recent specifications of irreversible functions are tested. The modified Nerlovian functions perform best from both the economic and statistical point of view. ...
DOI:
10.2307/1239350

25. Investigations in an Oxisol-Ultisol Toposequence in S.Paulo State, Brazil

Author:
I. F. Lepsch; S. W. Buol
Source:
Soil Science Society of America journal 1974 v.38 no.3 pp. 491-496
ISSN:
0361-5995
Subject:
Palehumults; Paleudults; bulk density; clay; gibbsite; organic matter; shale; silt; soil profiles; vermiculite; Brazil
Abstract:
... Four soil profiles were sampled along a 550-m toposequence traverse in São Paulo State, Brazil and were characterized with physical, chemical, mineralogical, and micromorphological analyses. The soils were classified and hypotheses were developed concerning their genesis based on soil differences observed. The soil on the upper part of the traverse has an ochric epipedon over an oxic horizon and i ...
DOI:
10.2136/sssaj1974.03615995003800030031x

26. Response of Soybeans to Liming as Related to Soil Acidity, Al and Mn Toxicities, and P in Some Oxisols of Brazil

Author:
J. A. Martini; R. A. Kochhann; O. J. Siqueira; C. M. Borkert
Source:
Soil Science Society of America journal 1974 v.38 no.4 pp. 616-620
ISSN:
0361-5995
Subject:
Glycine max; Oxisols; Triticum aestivum; aluminum; calcium; exchangeable aluminum; exchangeable calcium; exchangeable magnesium; liming; magnesium; manganese; nodulation; phosphorus; residual effects; soil pH; soybeans; wheat; Brazil
Abstract:
... The response of soybeans (Glycine max (L.) Merrill) to the direct and residual effect of liming in relation to soil acidity, Al and Mn toxicities and P availability was studied in five Oxisols of Southern Brazil under successive wheat (Triticum aestivum L.)-soybean cropping. Yield responses to liming were highly significant due to the high exchangeable Al and extractable Mn, the low pH, exchangeab ...
DOI:
10.2136/sssaj1974.03615995003800040027x

27. An annotated list of the Brazilian seaweeds in Dickie's herbarium

Author:
FILHO, E.C. de OLIVEIRA
Source:
Botanical journal of the Linnean Society 1974 v.69 no.3 pp. 229-238
ISSN:
0024-4074
Subject:
herbaria; macroalgae; plant taxonomy; Brazil
Abstract:
... The Brazilian seaweeds studied by G. Dickie (1874) have been critically reviewed and several names corrected according to new taxonomic concepts. Some doubtful records have been indicated. ...
DOI:
10.1111/j.1095-8339.1974.tb01627.x

28. A biological survey of St. Paul's Rocks in the equatorial Atlantic Ocean

Author:
Source:
Biological journal of the Linnean Society 1974 v.6 no.2 pp. 89-96
ISSN:
0024-4066
Subject:
Anthozoa; Crustacea; Cyanobacteria; Nematoda; Polychaeta; Protozoa; Rotifera; Sulidae; aquatic invertebrates; breeding; crabs; developmental stages; fauna; fish; flora; fungi; islands; mites; rocks; soil; surveys; Atlantic Ocean; Brazil
Abstract:
... In May 1971, an ornithological census was taken, and samples of soil and marine invertebrates collected, on St. Paul's Rocks-an isolated group of small islands in the equatorial Atlantic Ocean. Fish were caught nearby. Crabs (Grapsus grapsus) were abundant on the Rocks and rock pools contained anthozoa, polychaetes, Crustacea and gastropods–a marine invertebrate fauna apparently closely related to ...
DOI:
10.1111/j.1095-8312.1974.tb00715.x

29. Disaggregation of Input‐Output Models into Product Lines as an Economic Development Policy Tool

Author:
James R. Simpson; John W. Adams
Source:
American journal of agricultural economics 1975 v.57 no.4 pp. 584-590
ISSN:
0002-9092
Subject:
agricultural economics; beef; development policy; economic impact; exports; income; models; multipliers; planning; Argentina; Brazil; Paraguay; Uruguay
Abstract:
... A method of determining output and income multipliers for product lines by disaggregating sectors of either the transactions or technical coefficients matrix in existing input‐output studies is presented. The study focuses on beef exports from Argentina, Brazil, Paraguay, and Uruguay. The analysis indicates that canned and cooked/frozen beef, while generally considered low quality or inferior prod ...
DOI:
10.2307/1238876

30. Sulfur Fractions and Carbon-Nitrogen-Phosphorus-Sulfur Relationships in Some Brazilian and Iowa Soils

Author:
A. M. L. Neptune; M. A. Tabatabai; J. J. Hanway
Source:
Soil Science Society of America journal 1975 v.39 no.1 pp. 51-55
ISSN:
0361-5995
Subject:
adsorption; subtropical soils; sulfates; sulfur; temperate zones; Brazil; Iowa
Abstract:
... Current knowledge concerning the percentage distribution of the various S fractions in soils is mainly derived from studies of S in surface soils of temperate regions. This study was conducted to determine the S fractions and C-N-P-S relationships in some subtropical soils from Brazil and to compare the values in these soils with those in soils of a temperate region from Iowa. Analyses for S fract ...
DOI:
10.2136/sssaj1975.03615995003900010016x

31. The Effect of pH, Salt Concentration, and Nature of Electrolytes on the Charge Characteristics of Brazilian Tropical Soils

Author:
F. Ilton Morais; A. L. Page; L. J. Lund
Source:
Soil Science Society of America journal 1976 v.40 no.4 pp. 521-527
ISSN:
0361-5995
Subject:
A horizons; Alfisols; B horizons; Oxisols; Ultisols; adsorption; charge characteristics; electrical charges; electrochemistry; ions; magnesium chloride; magnesium sulfate; organic matter; pH; potassium chloride; potassium sulfate; protons; salt concentration; soil sampling; tropical soils; Brazil
Abstract:
... A study of the distribution of electric charges in the A and B horizons of some Oxisols, Ultisols, and Alfisols from Brazil was made by direct measurement of retention of ions in the presence of varying electrolyte concentrations. Soil samples were collected from the Amazonian Jungle and from the principal cocoa-producing zone of the country, the southern part of Bahia State. The electrochemical b ...
DOI:
10.2136/sssaj1976.03615995004000040022x

32. Electric Charges on Sesquioxidic Soil Clays

Author:
M. V. Fey; J. le Roux
Source:
Soil Science Society of America journal 1976 v.40 no.3 pp. 359-364
ISSN:
0361-5995
Subject:
allophane; anion exchange capacity; cations; clay; electrical charges; gels; hysteresis; oxalates; pH; phosphates; potassium chloride; sodium carbonate; titration; washing; Australia; Brazil; Japan; New Zealand; South Africa
Abstract:
... The effects of pH, phosphate, oxalate, pyrophosphate, citratedithionite-bicarbonate and Na₂CO₃ pretreatments on the positive and negative exchange charges of sesquioxidic clays from soils of South Africa, Australia, Brazil, Japan, and New Zealand were measured using 0.05N KCl as index electrolyte according to a method which obviates a washing step for removal of excess salt prior to replacement of ...
DOI:
10.2136/sssaj1976.03615995004000030017x

33. The Value of Information and the Value of Theoretical Models in Crop Response Research

Author:
Richard K. Perrin
Source:
American journal of agricultural economics 1976 v.58 no.1 pp. 54-61
ISSN:
0002-9092
Subject:
agricultural economics; corn; soil; soil classification; theoretical models; Brazil
Abstract:
... The concepts of the value of information and the value of alternative models are developed and applied to corn response research in Brazil. Soil test information was worth as much as $30 per hectare and the response model employed was worth up to $23 per hectare, but two soil classification models had negative values. ...
DOI:
10.2307/1238577

34. Cerrado Vegetation in Brazil: An Edaphic Gradient

Author:
A. S. Lopes; F. R. Cox
Source:
Agronomy journal 1977 v.69 no.5 pp. 828-831
ISSN:
0002-1962
Subject:
aluminum; calcium; canopy; cerrado; color; copper; exchangeable calcium; exchangeable magnesium; exchangeable potassium; forests; grasses; grasslands; magnesium; manganese; nutrient content; pH; particle size distribution; phosphorus; potassium; savannas; soil organic matter; soil properties; topsoil; trees; zinc; Brazil
Abstract:
... The vegetation in central Brazil is a tropical savanna called “cerrado” that varies from pure grassland to a nearly closed canopy of medium height trees overlying grass. Since forest is the expected climax vegetation there, several theories have been given to explain the types of grassland present. The more promising of these involve differences in soil properties, but only a few sites have been u ...
DOI:
10.2134/agronj1977.00021962006900050025x

35. Effects of Cutting Management on Eight Subtropical Pasture Mixtures

Author:
W. M. Murphy; J. M. Scholl; Ismar Baretto
Source:
Agronomy journal 1977 v.69 no.4 pp. 662-666
ISSN:
0002-1962
Subject:
Chloris gayana; Desmodium intortum; Digitaria eriantha; Lotononis bainesii; Macroptilium atropurpureum; Oxisols; botanical composition; crude protein; cutting frequency; digestible dry matter; forage; forage yield; glycine (amino acid); grasses; grazing intensity; growing season; legumes; sowing; stubble; tropical pastures; weeds; Brazil
Abstract:
... Rhodesgrass (Chloris gayana Kunth) and ‘Pangola’ digitgrass (Digitaria decumbens Stent.) were grown with desmodium (Desmodium intortum (Mill.) Urb), glycine (Glycine jevanica L. ‘Tinaroo’), lotononis (Lotononis bainesii Baker), or ‘Siratro’ (Macroptilium atropurpureum (D.C.) Urb) on an Oxisol near Porto Alegre, Grande do Sul. They were cut every 3 or 6 weeks at 5 or 13-cm stubble heights to simula ...
DOI:
10.2134/agronj1977.00021962006900040035x

36. Extraction, fractionation, and amino acid composition of Brazilian Comun cacao proteins

Author:
Timbie, D.J.; Keeney, P.G.
Source:
Journal of agricultural and food chemistry 1977 v.25 no.2 pp. 424-426
ISSN:
0021-8561
Subject:
Theobroma cacao; cultivars; cocoa beans; cocoa pods; plant proteins; extraction; fractionation; free amino acids; Brazil
DOI:
10.1021/jf60210a046
PubMed:
838985

37. RESISTANCE OF THE AF-28 SORGHUM VARIETY TO Contarinia sorghicola

Author:
LARA, F.M.; ROSSETTO, C.J.; IGUE, T.
Source:
Entomologia experimentalis et applicata 1977 v. no. pp. 238-242
ISSN:
0013-8703
Subject:
Contarinia sorghicola; Sorghum bicolor; hybrids; imagos; insect resistance; Brazil
Abstract:
... The variety AF-28 of Sorghum bicolor Pers and the hybrid R-1090 were compared in relation to the sorghum midge, Contarinia sorghicola (Coquillet), (Diptera: Cecidomyidae) in two counties of the State of São Paulo. They were compared in seven successive monthly trials beginning in September 1972. Averages of 252 and 137 adult flies emerged per head of the hybrid R-1090 in Campinas and Jaboticabal r ...
DOI:
10.1111/j.1570-7458.1977.tb02677.x

38. Response of Wheat Cultivars to Liming in Some High Al Oxisols of Rio Grande do Sul, Brazil

Author:
J. A. Martini; R. A. Kochhann; E. P. Gomes; F. Langer
Source:
Agronomy journal 1977 v.69 no.4 pp. 612-616
ISSN:
0002-1962
Subject:
Gaeumannomyces graminis var. graminis; Glycine max; Triticum aestivum; Udox; acid soils; aluminum; cultivars; disease incidence; exchangeable aluminum; limestone; liming; manganese; residual effects; soil pH; soil quality; toxicity; wheat; Brazil
Abstract:
... The objective of this field study was to determine the yield response of wheat (Triticum aestivum L.) to the direct and residual effects of liming in relation to variety, soil acidity, Al toxicity, P availability, and disease incidence in five Oxisols of Rio Grande do Sul, Brazil under successive wheat-soybean (Glycine max L. Merrill) cropping. This work was carried out under field conditions usin ...
DOI:
10.2134/agronj1977.00021962006900040022x

39. Soil-landscape Relationships in the Occidental Plateau of São Paulo State, Brazil: I. Geomorphic Surfaces and Soil Mapping Units

Author:
I. F. Lepsch; S. W. Buol; R. B. Daniels
Source:
Soil Science Society of America journal 1977 v.41 no.1 pp. 104-109
ISSN:
0361-5995
Subject:
Cretaceous period; base saturation; carbon; carbonates; clay; illuviation; landscapes; physicochemical properties; sandstone; soil parent materials; soil surveys; subsurface soil layers; weathering; Brazil
Abstract:
... This study was conducted in a 70.8 km² area that includes most of the soils and landscapes present in the Occidental Plateau region of São Paulo State, Brazil. Surficial deposits of unknown derivation and age and Cretaceous age carbonate cemented sandstone are the soil parent materials. Both geomorphic surfaces and soils were mapped. Surface and subsurface soil chemical and physical characteristic ...
DOI:
10.2136/sssaj1977.03615995004100010030x

40. Soil-landscape Relationships in the Occidental Plateau of São Paulo State, Brazil: II. Soil Morphology, Genesis, and Classification

Author:
I. F. Lepsch; S. W. Buol; R. B. Daniels
Source:
Soil Science Society of America journal 1977 v.41 no.1 pp. 109-115
ISSN:
0361-5995
Subject:
Alfisols; Inceptisols; Mollisols; Oxisols; Ultisols; argillic horizons; clay; highlands; iron; kaolinite; sandstone; smectite; soil surveys; Brazil
Abstract:
... Nine profiles representing the major soils in the Occidental Plateau of São Paulo State, Brazil, were characterized after detailed geomorphic and soil mapping were completed on a 70.8 km² area. The stable upland geomorphic surface had Oxisols, surrounded by younger erosional surfaces with Ultisols, Alfisols, and Inceptisols. Mollisols formed where the erosional surfaces exposed calcareous sandston ...
DOI:
10.2136/sssaj1977.03615995004100010031x

41. A Survey of the Fertility Status of Surface Soils Under “Cerrado” Vegetation in Brazil

Author:
A. S. Lopes; F. R. Cox
Source:
Soil Science Society of America journal 1977 v.41 no.4 pp. 742-747
ISSN:
0361-5995
Subject:
aluminum; calcium; cation exchange capacity; color; exchangeable aluminum; fertilizers; frequency distribution; intensive farming; iron; magnesium; nutrient content; organic matter; pH; soil separates; surveys; texture; topsoil; vegetation; zinc; Brazil
Abstract:
... Agriculture is becoming more intensive in central Brazil, but there is little information available on the fertility status of most of the soils. To determine this status a total of 518 topsoil samples were collected from a 600,000-km² area in central Brazil. Laboratory characterization included pH, exchangeable Al, cation exchange capacity, nutrient levels (including micronutrients), organic matt ...
DOI:
10.2136/sssaj1977.03615995004100040026x

42. The former southern distribution of New World manatees (Trichechus spp.)

Author:
WHITEHEAD, P.J.P.
Source:
Biological journal of the Linnean Society 1977 v.9 no.2 pp. 165-189
ISSN:
0024-4066
Subject:
Trichechus manatus; Brazil; French Guiana
Abstract:
... Records of New World manatees in 16th and 17th century literature extend the former distribution of Trichechus manatus to about 20° S. Early 19th century records confirm this range, but the species has since been exterminated from these southerly localities and is now rarely found to the south of Cayenne (French Guiana). Manatees probably did not occur at Rio de Janeiro or Santos, the Sao Vicente ...
DOI:
10.1111/j.1095-8312.1977.tb00264.x

43. Risk Attitudes of Subsistence Farmers in Northeast Brazil: A Sampling Approach

Author:
John L. Dillon; Pasquale L. Scandizzo
Source:
American journal of agricultural economics 1978 v.60 no.3 pp. 425-435
ISSN:
0002-9092
Subject:
attitudes and opinions; farmers; income; risk; small farms; socioeconomic factors; utility functions; Brazil
Abstract:
... Mind experiments involving choice between risky and sure farm alternatives were used to assess risk attitudes of samples of small farm owners and sharecroppers in Brazil. Results indicate that most subsistence farmers are risk averse, and that risk aversion tends to be more common and perhaps greater among owners than sharecroppers. In an expected utility context, distribution of risk attitude coe ...
DOI:
10.2307/1239939

44. Aluminum Organic Matter in Acid Soils: Buffering and Solution Aluminum Activity

Author:
P. R. Bloom; M. B. McBride; R. M. Weaver
Source:
Soil Science Society of America journal 1979 v.43 no.3 pp. 488-493
ISSN:
0361-5995
Subject:
Inceptisols; Oxisols; acid soils; aluminum; aluminum hydroxide; calcium; calcium chloride; cations; copper; humus; hydrolysis; lanthanum; leaves; magnesium; moieties; pH; peat; potassium; sodium; soil horizons; soil sampling; solubility; subsoil; Brazil; New York
Abstract:
... The variation of solution Al³⁺ activity with pH, the effect of suspending salt solution cation on Al³⁺ activity, and the buffering intensity were determined for salt solution suspensions of three soil samples and an Al substituted peat that contained one equivalent of Al³⁺ for each equivalent of carboxyl groups. The soil samples used were a surface and a subsurface horizon of an Inceptisol from Ne ...
DOI:
10.2136/sssaj1979.03615995004300030012x

45. Aluminum Organic Matter in Acid Soils: Salt-Extractable Aluminum

Author:
P. R. Bloom; M. B. McBride; R. M. Weaver
Source:
Soil Science Society of America journal 1979 v.43 no.4 pp. 813-815
ISSN:
0361-5995
Subject:
Inceptisols; Oxisols; acid soils; acidity; aluminum; cation exchange capacity; cations; moieties; organic matter; peat; potassium chloride; Brazil; New York
Abstract:
... Sample horizons of an acid Inceptisol from New York, an Oxisol from Brazil, and an aluminum-peat complex containing 1 mole of Al per mole of peat carboxyl groups were extracted with 1N KCl and 1N LaCl₃. For all three materials, LaCl₃ extracted significantly more Al. The quantity of Al extracted expressed as a fraction of the BaCl₂-TEA acidity was greater for the peat than the soils. It was conclud ...
DOI:
10.2136/sssaj1979.03615995004300040041x

46. The Brazilian soybean situation and its impact on the world oils market

Author:
Thompson, R.L.
Source:
Journal of the American Oil Chemists' Society 1979 v.56 no.5 pp. 391A-398A
ISSN:
0003-021X
Subject:
soybean oil; soybeans; marketing; grains; Brazil
DOI:
10.1007/BF02660264

47. Changes in Soluble Nitrogen, pH and Lactic Acid During Ripening of Chabichou-type Cheese

Author:
A. F. Wolfschoon; M. Mansur Furtado
Source:
Journal of food protection 1979 v.42 no.8 pp. 666-667
ISSN:
0362-028X
Subject:
cheeses; goat milk; lactic acid; nitrogen content; pH; ripening; sodium chloride; titratable acidity; Brazil
Abstract:
... Twenty-eight samples of Chabichou-type cheese made from goat's milk in Juiz de Fora, Brazil, were tested for soluble and total nitrogen, titratable acidity (expressed as percent lactic acid), and pH during a 30-day period. Soluble N amounted to 45% of total N after 30 days, and pH and lactic acid were increased and decreased, respectively, from 5.20 to 6.82 and from 0.83 to 0.05%. The composition ...
DOI:
10.4315/0362-028X-42.8.666

48. Effect Upon Soybean Cultivar Bragg, When P is Band-concentrated Upon Variable Soil-Available P

Author:
R. G. Hanson
Source:
Agronomy journal 1979 v.71 no.2 pp. 267-271
ISSN:
0002-1962
Subject:
Glycine max; Paleudults; agronomy; cultivars; experimental design; fertilizers; imports; leaves; models; nutrient balance; seed yield; silt loam soils; soybeans; Brazil
Abstract:
... Soybean (Glycine max (L) Memll) growers in Brazil commonly band corrective and maintenance fertilizer near the seed at planting time. Little information existed to substantiate this as the most efficient P placement method. Because P is an immobile element in the soil and a costly import for Brazilian farmers, placement may be critical This research was undertaken to evaluate the influence of P br ...
DOI:
10.2134/agronj1979.00021962007100020012x

49. Effect of Depth of Lime Incorporation on the Growth of Corn on an Oxisol of Central Brazil

Author:
E. Gonzalez-Erico; E. J. Kamprath; G. C. Naderman; W. V. Soares
Source:
Soil Science Society of America journal 1979 v.43 no.6 pp. 1155-1158
ISSN:
0361-5995
Subject:
Haplustox; Zea mays; acid soils; aluminum; calcium carbonate; cerrado; corn; crops; grain yield; intensive cropping; liming; magnesium; magnesium sulfate; neutralization; nutrition; soil solution; toxicity; water utilization; Brazil
Abstract:
... High Al saturation is one of the limiting factors to intensive cropping of many soils in the Cerrado of Brazil. A field study on the effect of lime rate and depth of incorporation on growth of corn (Zea mays L.) was conducted on an Oxisol (Typic Haplustox) at Brasilia. Lime rates used were 0, 1, 2, 4, and 8 tons CaCO₃/ha and depths of incorporation were 15 and 30 cm. Incorporation of 4 tons of CaC ...
DOI:
10.2136/sssaj1979.03615995004300060019x

50. Phosphorus Response of Corn on an Oxisol as Influenced by Rates and Placement

Author:
R. S. Yost; E. J. Kamprath; E. Lobato; G. Naderman
Source:
Soil Science Society of America journal 1979 v.43 no.2 pp. 338-343
ISSN:
0361-5995
Subject:
Oxisols; Zea mays; application rate; cerrado; corn; crops; fertilizer application; greenhouse experimentation; intensive cropping; phosphorus; phosphorus fertilizers; residual effects; Brazil
Abstract:
... Phosphorus deficiency and high P sorbing capacities are a major limitation to intensive cropping of many soils in the Cerrado area of Central Brazil. A field study comparing rates and placement of P for corn (Zea may L.) was conducted to determine initial and long-term P fertilization requirements. Rates of broadcast P were 70, 140, 280, and 560 kg P/ha and banded rates were 35, 70, and 140 kg P/h ...
DOI:
10.2136/sssaj1979.03615995004300020020x