Food consumption of Rhammatocerus schistocercoides Rehn (Orthoptera: Acrididae) infected by the fungus Metarhizium flavoviride Gams & Rozsypal.

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The isotopic composition (d15N, d13C) of agricultural wastes and derived composts.

The aim of this study was to measure variations in the isotopic composition (d13C and d15N) during the composting of different agricultural wastes using bench-scale bioreactors. Four different feedstocks of agricultural wastes (Horse bedding manure + legumes residues; Dairy manure + Jatropha mill cake; Dairy manure + sugarcane residues; Dairy manure) were used for aerobic-thermophilic composting. During composting no significant differences were found between the d13C values of the source material and the compost, except for Dairy manure + sugarcane residues. d15N values increased significantly in composts of Horse bedding manure + legumes residues and Dairy manure + Jatropha mill cake. d15N values of composts may be related to NH3 volatilization during the composting process. Isotopic signatures (d13C, d15N) can be used to differentiate composts from different feedstock sources and d15N values may be a quantitative indicator of NH3 volatilization during composting. Use of bench-scale bioreactors is a promising apparatus to study the dynamics of C and N and stable isotopes signatures during composting, but future adjustments regarding sampling methodology are necessary

Contribuição da pesquisa de melhoramento genético para elevação da produtividade da lavoura arrozeira do Rio Grande do Sul.

Este trabalho visa quantificar a contribuição dos programas de melhoramento genético de arroz irrigado do IRGA e da Embrapa para o caráter rendimento de grãos no período de 1983 (safra 1982/83) a 2011 (safra 2010/11)

Seismic characterization of fluid migration and Pockmarks formation in the Estremadura Spur, Western Iberian Margin

: A field with more than 30 pockmarks was recently discovered in the Estremadura Spur outer shelf (Lourinhã Monocline). The processing of high-resolution seismic lines permitted the characterization of this pockmark field and of the seismic sequence of the Plio-Quaternary basin where they occur. Results show that this region has been affected by several episodes of fluid migration and fluid escape during the Plio-Quaternary, expressed by the presence of the pockmarks that at the present-time seem to be mainly inactive

Seleção simultânea de caracteres em população de seleção recorrente de arroz irrigado.

O presente trabalho teve como objetivo avaliar a eficiência da seleção simultânea de caracteres, por meio de índice de seleção, em população de seleção recorrente de arroz irrigado

Performance of Embrapa's elite populations of subtropical lowland rice in the 2013/14 crop year.

This study aimed to estimate GY genetic progress expected in the FY from the 2013/14 crop year. The trials were carried out in Goianira and Alegrete, respectively in the Center and Southwest of Brazil

Capacidade de combinação de linhagens de arroz irrigado.

O objetivo deste estudo foi avaliar o potencial de 40 linhagens de arroz como genitores de populações-base do programa de melhoramento genético da Embrapa para a região subtropical do Brasil, com irrigação por inundação

Avaliação precoce de rendimento de grãos no melhoramento de arroz.

O presente trabalho foi desenvolvido visando quantificar os benefícios da seleção, para produtividade de grãos entre famílias F2:4 no desempenho do conjunto de linhagens derivadas de plantas selecionadas em F2:5