Early means of maintaining soil fertility included intercropping, crop rotations that included legumes, fallowing, manuring, and the addition of ash. By using these techniques some societies developed sustainable agricultural systems that persisted for thousands of years. However, human management has ...
Traditional knowledge in the form of Indigenous Maya soil classification has also proven critical to understanding land use patterns and crop choice in various settings, while demonstrating that Maya classification is not based solely on physical characteristics of the soil, but often incorporates elements...
As Nagri Formation channel systems were also clearly braided, full channel dimensions and discharge estimates are probably at least a factor of two greater than for individual channel segments (i.e. order of 10,000 m3/s). Strata between major sandstone bodies are dominated by lobate and wedge-...
veronii strains were isolated from soil and water samples [58]; thus, we can as- sume that the ancient P. veronii PVER may have pos- sessed peculiar systems that assisted this strain in human gut colonization. Accordingly, the modern P. veronii strains may have lost the pilus-encoding ...
Our analysis uncovered several differences between symbiotic and free-living bacteria, including an increased abundance of genes encoding prokaryotic defense systems (PDSs) and eukaryotic-like proteins (ELPs) in symbionts. Furthermore, we identified GPP34 as a novel symbiosis-related gene family, found...
Other, summed proportions across non-oral microbial groups (non-oral human microbiome, air, and soil) and unknown classification. Groups have a minimum of two samples (the non-human primate group is removed in filtered analysis as filtering reduced the sample number to one) and are displayed ...
abundances of these elements, suggesting that iron in the dust is a product of chemical alteration23,27,28. The MERs were also equipped with a series of magnet arrays designed to analyze airfall dust. The analysis of the magnetic targets using MB spectra and imaging systems identified two ...
but they are used as medicinal plants. Yams are integrated on anthropogenic soils of shellmounds and in swiddens in monoculture systems or in intercropping withZea maysorColocasia esculenta. The presence of exotic food trees andD. cayennensisin some shellmounds indicates the influence of colonizers...
Soil systems are generally dynamic and open to influxes of new material due to geologic processes such as volcanic and volcaniclastic inputs (e.g., Ashley and Driese, 2000), aeolian inputs (e.g., Mason and Jacobs, 1998), and fluvial inputs (e.g., Birkeland, 1999). This paper ...
The conceptual sub-model shows how these two water-flow systems and three biomineralization processes lead to the formation of these saline sulfidic marsh soils. It illustrates how the following three main conditions control the formation of these non-tidal saline sulfidic marsh soils: (i) the ...