PRODUCTION AGRICULTURE AS A KNOWLEDGE CREATING SYSTEM

Production Economics,

Efeito do desfolhamento causado por Brassolis sophorae em coqueiros sobre a produção de albúmen fresco dos frutos.

Publicado também: FRAZÃO, D. A. C.; HOMMA, A. K. O; VIÉGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na Amazônia. Belém, PA: Embrapa Amazônia Oriental, 2006. p. 325-330

CARETS: A prototype regional environmental information system. Volume 5: Interpretation, compilation and field verification procedures in the CARETS project

The author has identified the following significant results. Level 2 land use mapping from high altitude aircraft photography at a scale of 1:100,000 required production of a photomosaic mapping base for each of the 48, 50 x 50 km sheets, and the interpretation and coding of land use polygons on drafting film overlays. To enhance the value of the land use sheets, a series of overlays was compiled, showing cultural features, county boundaries and census tracts, surface geology, and drainage basins. In producing level 1 land use maps from LANDSAT imagery, at a scale of 1:250,000 drafting film was directly overlaid on LANDSAT color composite transparencies. Numerous areas of change were identified, but extensive areas of false changes were also noted

CARETS: A prototype regional environmental information system. Volume 2, parts A and B: Norfolk and environs; a land use perspective

The author has identified the following significant results. The Norfolk-Portsmouth metropolitan statistical area in southeastern Virginia was the site of intensive testing of a number of land resources assessment methods. Land use and land cover data at three levels of detail were derived by manual image interpretation from both aircraft and satellite sources and used to characterize the 1,766 sq km (682 sq mi) area from the perspective of its various resource-related activities and problems. Measurements at level 1 from 1:100, 000 scale maps revealed 42 percent of the test area (excluding bays and estuaries) to be forest, 28 percent agriculture, 23 percent urban and built-up, 4 percent nonforested wetlands, and 2 percent water. At the same scale and level of detail, 10 percent of the area underwent change from one land use category to another in the period 1959-70, 62 percent of which involved the relatively irreversible change from forest or agriculture to urban uses

A multiscale view on inverse statistics and gain/loss asymmetry in financial time series

Researchers have studied the first passage time of financial time series and observed that the smallest time interval needed for a stock index to move a given distance is typically shorter for negative than for positive price movements. The same is not observed for the index constituents, the individual stocks. We use the discrete wavelet transform to illustrate that this is a long rather than short time scale phenomenon -- if enough low frequency content of the price process is removed, the asymmetry disappears. We also propose a new model, which explain the asymmetry by prolonged, correlated down movements of individual stocks

Avaliação de inseticidas para o controle de Homalinotus Depressus L. (Coleoptera: Curculionidae) em lavoura comercial de coco, no Estado do Pará.

Resumo 1487-3

Eficácia de doses do inseticida fipronil sobre adultos de Homalinotus depressus L. (Coleoptera: Curculionidae: Cholini) em laboratório.

A detecção de Pissodes castaneus em plantios de Pinus spp. no Brasil foi registrada em 2001 no município de São José dos Ausentes, RS, e, em função dos plantios extensivos de Pinus, o inseto já se encontra distribuído em vários municípios na região Sul. O principal dano é ocasionado pelas larvas que broqueiam os ponteiros de Pinus, construindo galerias e anelando ramos e troncos em árvores jovens e adultas. As árvores atacadas apresentam copa marrom avermelhada e punturas na casca resultantes da oviposição e alimentação pelos adultos. Assim, o objetivo desta pesquisa foi determinar o período de maior ocorrência dessa praga na região madeireira do planalto norte do Estado de Santa Catarina.Resumo 1252-2

Eficácia de inseticidas químicos no controle da broca-do-pedúnculo-floral Homalinotus Depressus L. (Coleoptera: Curculionidae: Cholini) em laboratório.

Resumo 1252-1