Decomposição de resíduos vegetais de espécies da Caatinga, na região de Patos, PB RESUMO Estudar a dinâmica de decomposição de resíduos vegetais de diferentes espécies da caatinga e avaliar a atividade microbiana na região semi-árida da Paraíba, é o ponto que norteia este trabalho. A área de estudo localizou-se no município de Patos, PB, com clima do tipo Bhs, definido como semi-árido quente e seco, com estação seca bem definida temperatura média de 28,8º C, altitude de 270 m e precipitações médias de 400 mm. O solo da área em estudo foi classificado como Luvissolo Crômico Órtico planossólico vértico. Adotou-se um DIC, em um fatorial 5 x 2, referentes aos resíduos vegetais das cinco espécies, pereiro (Aspidosperma pirifolium), favela (Cnidoscolus phylacanthus), pinhão bravo (Jatropha curcas), gliricídia (Gliricidia sepium) e canafistula (Pithecolobium multiflorum), depositados na superfície e enterrados no solo, com parcelas subdivididas no tempo (1, 2, 3, 4, 5, 6, 7 meses) com 4 repetições. Avaliaaram-se a pluviosidade, o teor de água no solo, a taxa de decomposição do material e a atividade microbiana, medida pela absorção do CO 2 , às 19:00 h e às 07:00 h, durante 210 dias. As maiores taxas de respiração microbiana ocorrem no período noturno, independente dos resíduos vegetais. Todos os resíduos vegetais das espécies estudados apresentaram maior taxa de decomposição quando enterradas, em que a gliricídia apresentou maiores resultados.Palavras-chaves: taxa de decomposição, respiração edáfica, espécies florestais Decomposition of vegetable residues of different species of the Caatinga in the region of Patos, Paraíba State ABSTRACTThe aim of this work was to study the dynamic of decomposition of vegetable residues of different species of the Caatinga and to evaluate the microbial activity in the semi-arid region in the Paraíba State. The study area was located in the city of Patos PB, with climate of the type Bhs, defined as semi-arid hot and dry with dry season well defined, mean temperature of 28,8 ºC, altitude of 270 m and mean precipitation of 400 mm. The soil of the study area was classified as Luvissolo Crômico Órtico planossólico vértico. The experimental design was completely randomized in a 5 x 2 factorial, in referring to residues of the five species, 'pereiro' (Aspidosperma pirifolium), 'favela' (Cnidoscolus phylacanthus), 'pinhão bravo' (Jatropha curcas), 'gliricídia' (Gliricidia sepium), 'canafistula' (Pithecolobium multiflorum), deposited on soil surface and buried in the soil, with portions subdivided in the time (1, 2, 3, 4, 5, 6, 7 months) with four replications. The rainfall the content of water in the soil, rate of decomposition of the material were evaluted and the microbial activity was measured by the absorption of CO 2 , at 07:00 p.m and at 07:00 a.m.for 210 days. The highest rates of microbial breathing independent of plant species occured during night. All the vegetable residues of the species studied presented higher rate of decomposition when buried, and the 'gliricídia' presented bett...

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Although agile methods in their purest way fit several companies, it has been a challenge to perform them in environments with distributed teams developing large software applications. Contractual items, for projects under development for external organizations, introduce additional complexities for pure agilebased approaches. The majority of global teams and companies use hybrid development practices that combine different development methods and frameworks. This research provides results from an empirical field study on how the hybrids practices are adopted in Global Software Development (GSD) projects. A systematic literature review was conducted to capture the status of combining agile with plan-driven in GSD projects. The results were limited to peer-reviewed conference papers or journal articles, published between 2001 and 2020. The present study selected 37 papers from five different bibliographic databases. In the end, 16 practices were summarized and described as hybrid by GSD projects. Based on the findings of this study, the authors can conclude that the contribution of this study is not only limited to identifying how hybrid development practices are applied in GSD but also allowing that practitioners can have a basis for adapting their development methods.