|
|
|
| Registros recuperados: 1.235 | |
|
| |
|
|
| Griffith, Garry R.. |
| This paper is concerned with determining the nature of and the relationships between movements in a number of New South Wales pig and pork price series. Spectral and cross-spectral methods are applied to some ten series differentiated by type of pig and market level. Results indicate that over the long term there are in general strong correlations between the various price pairings examined, but that in the shorter-run, price changes are not well reflected throughout the pig market. The role of imperfect information is noted as a major contributor to this observed short-run price independence. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1975 |
URL: http://purl.umn.edu/9147 |
| |
|
|
| Jacintho,A.O.. |
| No presente trabalho foi desenvolvida a primeira fase dos estudos experimentais do método da 2,2'-dipiridil cetoxima, para a determinação do cobalto. Os ensaios foram conduzidos em soluções puras e dentre os aspectos estudados constam; o reativo, preparo, concentração e conservação; o pH, influencia sobre a formação e extração do composto colorido; o sistema tampão, influencia sobre a reação, eficiência e escolha. Numa seqüência, serão apresentados posteriormente estudos sobre solventes, influência de diversos ions e aplicação do método em análises de plantas. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761975000100019 |
| |
|
|
| Jacintho,A.O.. |
| Foram continuados os estudos da parte experimental do método da 2,2'-dipiridil cetoxima, cuja finalidade é o estabelecimento de uma técnica adequada para a determinação do cobalto em material vegetal. Estudos sobre o preparo, concentração e conservação do reativo, sobre a influência do pH na formação e extração do composto colorido e sobre o sistema tampão, já foram efetuados na etapa inicial. Nesta oportunidade, procurou-se estudar o solvente; sua seleção, a sensibilidade, o tempo de extração, a influência do contato entre as fases e a estabilidade da cor do composto. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761975000100023 |
| |
|
| |
|
|
| Cervantes, Carlos F.. |
| Among the different institutions through which the Costa Rican government influences production and internal marketing of agricultural commodities, the Consejo Nacional de Produccion (CNP) is the most important one. The Consejo is given by law a great deal of authority in fomenting production and stabilizing prices of food products. It is also entitled to perform a wide range of activities and marketing functions affecting the food system (buying and selling, assembling, transporting, storing and processing, importing and exporting, price fixing, input distribution, etc.). Because of the strategic role of agriculture in the country, and due to very significant influence of the Consejo's intervention upon production, marketing and consumption in... |
| Tipo: Thesis or Dissertation |
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries. |
| Ano: 1975 |
URL: http://purl.umn.edu/11192 |
| |
|
|
| Pennington, T.D.; Styles, B.T.. |
| Of all plant families the Meliaceae is among the more useful to man, chiefly for its high quality timbers and for the ease with which some species can be grown in plantations. Almost confined to the tropics, its species nevertheless pervade them, and occur, often conspicuously, in a variety of habitats from rain forest to mangrove swamp and semidesert. For its size, the family probably contains a wider range of floral and fruit structures than any comparable group. In what other family is there such a diversity of primitive ‘arillate’5 seeds, side-by-side with such an array of derived fruits and seeds, and still connected by intermediates? Or, to take the flower, where else can be found such a diversity of forms, from the minute, but structurally complex,... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/524789 |
| |
|
|
| Scalopi,E.J.; Scardua,R.; Klar,A.E.. |
| Neste trabalho foi realizado um estudo para avaliar os efeitos da irrigação e fertilizantes no rendimento, número e tamanho dos tubérculos de batata. A irrigação foi baseada na umidade média do solo quando atingia as tensões de 0,3; 0,6; 1,0; 3,0 e 10,0 bares. As doses de fertilizantes aplicadas foram de 40 kg/ha de N, 80 kg/ha de P2O5 e 40 kg/ha de K(2)0, sendo a dose 1, 40-80-40 kg/ha de N, P(2)0(5) e K(2)0, respectivamente. Os melhores rendimentos foram alcançados a tensões de umidade do solo menor do que 1,0 bar e as doses 3, 4 e 5 de fertilizantes. Não houve diferença significativa no número de tubérculos entre os tratamentos. Foi observado com aumento na porcentagem de tubérculos maiores nos tratamentos com tensão de umidade de 0,3; 0,6 e 1,0 bar e... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761975000100033 |
| |
|
|
| Uéno, M.. |
| Recently I came across a portrait of Heinrich Bürger made when, as a secretary to Philipp Franz von Siebold, he visited Edo (now Tokyo) in 1826. This portrait is a rough sketch, and so far probably is the only portrait of him in existence. It was made by Watanabe-Kwazan (written also as Kwazan Watanabe after the western manner), an eminent artist, who, at that time, was also highly distinguished as a scholar of western thinking, a consequence of his Dutch learning. The present sketch was found in a collection of Watanabe's works owned by an old family, Kasuya by name, residing in the town of Kira in Aichi Prefecture. Watanabe's last place, Tabara, is located south of Kira beyond the Bay of Mikawa. Watanabe died there in 1841. Burger's biographic data... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.01. |
| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/319207 |
| |
|
| |
|
|
| Piggott, Roley R.. |
| Certain market allocation problems involving linear average net revenue functions can be solved by linear programming. The technique can be applied to an objective function derived from linear marginal net revenue functions, the objective being to force each marginal net revenue as near to zero as possible given the constraint set. If a particular problem is suited to a linear programming solution, researchers may prefer to use this technique rather than more sophisticated optimization methods. |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1975 |
URL: http://purl.umn.edu/22550 |
| |
| Registros recuperados: 1.235 | |
|
|
|
