Resumen de la pesquería de anchoveta y otras especies, para reducción. Enero-julio 1973

Expone que la principal característica de la pesquería correspondiente a los meses de marzo-mayo, fue la excepcional intervención de la sardina y otras especies como la anchoveta blanca, jurel, merluza, caballa, etc, sobre todo en las zonas comprendidas entre Supe y el puerto de Ilo.

Resumen general de la pesquería de anchoveta durante 1972

Da a conocer el resumen de la pesquería del recurso anchoveta para el año 1972, el cual se consideró como un año muy anormal para la pesca del recurso.

Tableaux et dessins anciens et modernes : collection de M. Véron / [expert] Francis Petit

[Vente. Art. 1858-03-18. Paris]

Catalogue de tableaux modernes, dessins... provenant du cabinet de monsieur le docteur F***... / [expert] Francis Petit

[Vente. Art. 1858-04-10. Paris]

Catalogue de tableaux et dessins modernes... / [expert] Francis Petit

[Vente. Art. 1859-02-26. Paris]

Valkoiset seikkailijat : Betsuanamaan sodat ja eurooppalaisen vallan ekspansio Etelä-Afrikassa 1881-1883

Harri Mäki

Modelling the risk of nitrate leaching from two soils amended with five different biosolids

High N concentrations in biosolids are one of the strongest reasons for their agricultural use. However, it is essential to understand the fate of N in soils treated with biosolids for both plant nutrition and managing the environmental risk of NO3--N leaching. This work aimed at evaluating the risk of NO3--N leaching from a Spodosol and an Oxisol, each one treated with 0.5-8.0 dry Mg ha-1 of fresh tertiary sewage sludge, composted biosolids, limed biosolids, heat-dried biosolids and solar-irradiated biosolids. Results indicated that under similar application rates NO3--N accumulated up to three times more in the 20 cm topsoil of the Oxisol than the Spodosol. However, a higher water content held at field capacity in the Oxisol compensated for the greater nitrate concentrations. A 20 % NO3--N loss from the root zone in the amended Oxisol could be expected. Depending on the biosolids type, 42 to 76 % of the NO3--N accumulated in the Spodosol could be expected to leach down from the amended 20 cm topsoil. NO3--N expected to leach from the Spodosol ranged from 0.8 (composted sludge) to 3.5 times (limed sludge) the amounts leaching from the Oxisol treated alike. Nevertheless, the risk of NO3--N groundwater contamination as a result of a single biosolids land application at 0.5-8.0 dry Mg ha-1 could be considered low.