Soil pollution refers to the presence in the soil of a chemical or substance out of place and/or present at a higher than normal concentration that has adverse effects on any non-targeted organism. (The international Code of Conduct for the sustainable use and management of fertilizers, FAO 2019 http://www.fao.org/3/ca5253en/CA5253EN.pdf)
An organism aggregation is a grouping or crowding of separate organisms. Organism aggregations are a regular feature of natural ecosystems and occur for many reasons, including social and spawning activities or to provide benefits to individuals such as thermal advantages. (Adapted from ASFA Thesaurus and from Chapperon C, Seuront L (2012) Keeping warm in the cold: on the thermal benefits of aggregation behaviour in an intertidal ectotherm. J Therm Biol 37:640−647 - in https://www.int-res.com/articles/meps_oa/m534p135.pdf)
Display behaviour is a set of ritualized behaviours that enable an animal to communicate to other animals (typically of the same species) about specific stimuli. (https://en.wikipedia.org/wiki/Display_(zoology))
Three categories for soil particles have been established — sand, silt and clay. These three groups are called soil separates. The three groups are divided by their particle size. (University of Nebraska–Lincoln, Soils - Part 2: Physical Properties of Soil and Soil Water)
A guyed mast or guyed tower is a tall thin vertical structure that depends on guy lines (diagonal tensioned cables attached to the ground) for stability. (https://en.wikipedia.org/wiki/Guyed_mast)
The way individual particles of sand, silt and clay are assembled to form aggregates; described in terms of grade (degree of aggregation), class (average size), type of aggregates (form) and the nature and distribution of pores and pore spaces. (FAO. 2008. Glossary of aquaculture. https://openknowledge.fao.org/handle/20.500.14283/a1555m)
