ABSTRACT Cowpea (Vigna unguiculata (L.) Walp.) is an excellent crop for research in semi-arid regions, due to its tolerance high temperatures and water deficit, with satisfactory yields rain-fed cultivation. The objective this work was evaluate the genotype x environment (G × E) interaction, adaptability stability of cowpea landraces used Cariri, Paraíba, semiarid region Northeast Brazil. exper...

abstract one of the methods for improving soil physical quality of arid and semiarid regions is the application of cheap organic conditioners such as sewage sludge. this research was conducted in large pots (50 cm diameter, 25 cm height) to study the effects of tabriz petrochemical biological sludge at 4 rates (25, 50, 75 and 100 tons/ha) on organic carbon (oc), mean weight diameter (mwd) of ag...

Abstract Since the 1990s, Qinghai-Tibetan Plateau (QTP) has experienced a strikingly warming and wetter climate that alters thermal hydrological properties of frozen ground. A positive correlation between degradation in permafrost or seasonally ground (SFG) long been recognized. Still, predictive relationship historical wetting under conditions not yet well demonstrated, despite expectation it ...

[1] Subduction zones are where sediments, oceanic crust, and mantle lithosphere return to and reequilibrate with Earth’s mantle. Subduction zones are interior expressions of Earth’s 55,000 km of convergent plate margins and are the geodynamic system that builds island arcs. Excess density of the mantle lithosphere in subduction zones provides most of the power needed to move the plates while in...

Mountains are important sources of freshwater for the adjacent lowlands. In view of increasingly scarce freshwater resources, this contribution should be clarified. While earlier studies focused on selected river systems in different climate zones, we attempt here a first spatially explicit, global typology of the so-called ‘‘water towers’’ at the 0.5° x 0.5° resolution in order to identify cri...

In 2010 settles in the Educational Unit of Palmeira dos Indios, Campus Arapiraca, group Tutorial Education Program – Alagoas Semiarid Studies Center (PET-Nesal), bringing together courses Psychology Social Work. The group's proposal for elaboration branches from need reflections on internalized space that UFAL began to occupy 2006, since emergencies existing semiarid region demand a contextuali...

We present results of the paleoparasitological analysis of Cervidae coprolites that were recovered from the archaeological site Furna do Estrago, Pernambuco, Brazil. Trichuris sp. eggs were recovered from the coprolite samples dated 1,040 ± 50 years before present. This is the first record of Trichuris sp. in semiarid Cervidae, unexpectedly recorded in archaeological material.