Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil (A horizon), typically between 60 and 80 cm (24-31 in) in depth. This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of Mollisols.

Albolls are the Mollisols that have both an albic horizon and fluctuating ground water. They are mostly on the Great Plains, in eastern Washington, and in Oregon and Idaho. Most supported grass or grass and shrub vegetation. In early stages of development, some are thought to have supported forest vegetation that was later succeeded by grass.

Mollisols are characterized by a significant accumulation of humus in the surface horizon, or uppermost layer, which is almost always formed under native grass vegetation. They are highly arable soils used principally for growing grain and cereal crops, often inspiring the name “breadbasket” for the regions where they dominate.

mollisol，英语单词，主要用作名词，作名词时译为“ [土壤] 软土”。

Mollisols (from Latin mollis, "soft") are the soils of grassland ecosystems. They are characterized by a thick, dark surface horizon. This fertile surface horizon, known as a mollic epipedon, results from the long-term addition of organic materials derived from plant roots.

2012年1月1日 · Mollisols – a.k.a., Black Soils or Prairie Soils – make up about 916 million ha, which is 7% of the world's ice-free land surface. Their distribution strongly correlates with native prairie ecosystems, but is not limited to them. They are most prevalent in the mid-latitudes of North America, Eurasia, and South America.

2011年7月14日 · Mollisols are often recognized as inherently productive and fertile soils. They are extensively and intensively farmed, and increasingly dedicated to cereals production, which needs significant...

Mollisols are naturally fertile soils with a thick, friable, very dark coloured, organic rich, surface layer (mollic epipedon). You might find these chapters and articles relevant to this topic. Generally in Soil Taxonomy, it is the presence or absence of subsurface horizons and their characteristics that are used to separate the orders.

El molisol o mollisol es un orden de suelos en el sistema de Soil Taxonomy. Se forman en áreas semiáridas a semihúmedas, típicamente bajo una cobertura de pasturas. Se hallan mayormente en latitudes de la banda de 50 º N y S del Ecuador, Sudamérica, sudeste de Australia (mayormente sur de Australia) y Sudáfrica.

2020年1月13日 · Mollisols are the most fertile, high-yielding soils in the world. During the past several decades, Mollisols have lost about 50% of their antecedent organic carbon (C) pool due to soil erosion, degradation, and other unsuitable human activities.