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Sewage water is widely used for irrigation in dry countries, but the practice can lead to the accumulation of heavy metals in the soil and consequent poisoning of the soil's microorganisms. The area irrigated with sewage water in the Mezquital Valley in central Mexico has steadily expanded during the last 100 years, and it provides the opportunity to assess the effects of the practice on the mycorrhiza...
During the past few decades, Mexico has been converting tropical dry forest (TDF) into cropland and pasture, with land degradation expressed as soil erosion being the main environmental consequence. The factors and processes influencing soil erosion are related to scale. At a microscale, the stability of soil aggregates has a significant impact on soil erodibility and strongly influences other soil...
Phosphorus (P) and heavy metals introduced into soil by irrigating with sewage effluent can affect the soil's microflora and, in particular, the abundance of arbuscular mycorrhizal fungi. We have studied the effect in the Mezquital Valley of Mexico, on two kinds of soil (Leptosol and Vertisol) after both short-term (5 years) and long-term (90 years) irrigation. We did so by replicated sampling of...
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