Tag: loam soil

Loam is soil composed mostly of sand and silt, and a smaller amount of clay (about 40%-40%-20% concentration, respectively). These proportions can vary to a degree, however, and result in different types of loam soils: sandy loam, silty loam, clay loam, sandy clay loam, silty clay loam, and loam. In the USDA textural classification triangle, the only soil that is not predominantly sand, silt, nor clay is called “loam”. Loam soils generally contain more nutrients, moisture, and humus than sandy soils, have better drainage and infiltration of water and air than silty soils, and are easier to till than clay soils.

Stormwater Irrigation

During recent decades there has been a growing national recognition that shrubs and trees in urban landscapes have both environmental and socioeconomic value. Research has shown that vegetation along streets and parking lots can lower urban temperatures and energy consumption (Halverson and Heisler 1981, Scott et al. 1999); filter, degrade,

Dealing With Dust

Dealing With Dust

For the most part, 2011 has been a tough weather year, especially for growers. During the spring, some areas of the country received record rains, washing out plantings; summer blew in with a vengeance, with searing temperatures and widespread drought. In August, the US Climate Prediction Center warned that the

Bioretention Filters

Bioretention Filters

Bioretention has been in use for two decades. A large body of laboratory and field data provides indications of the performance. It is therefore appropriate to synthesize this information so as to provide insight into when and when not bioretention should be used. This first of two articles on bioretention

A Laboratory for LID

When Wetland Studies and Solutions Inc. (WSSI) decided to construct its new headquarters in Gainesville, VA, there was no question that the building and site would be developed in a manner that sought to limit untoward environmental effects, especially on an adjoining wetland and stream system. After all, the company–a

Sediments and Settlements

Smaller sites affected by new EPA rulings receive stormwater pollution protection plans similar to larger sites-but smaller sites mean more neighbors.

Treatment BMP Terminology: A Tower of Babel?

So just what is hydrodynamic separation? The terminology has proliferated, yet no one seems to have provided a definition. Our use of the descriptor initially referred to vortex separators. To this group has recently been added small manufactured wet vaults and even, by some, generic oil/water separators. Common to the

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