Sustainable Agriculture Literature Review - Boulder County

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Neutral soil: A slight difference in soil qualities between the topsoil and subsurface soil,
causing it to erode initially but then stabilize. 918
Non-point Source (NPS) pollution: Pollution sources that are diffuse and do not have
a single point of origin, such as agriculture, forestry, and urban runoff. 919
Open pollinated: Open-pollinated vegetable varieties reproduce themselves in one of
two ways: cross-pollination (see def.) or self-pollination (see def.). 920
Organic agriculture: A production system, which avoids or largely excludes the use of
synthetically compounded fertilizers, pesticides, growth regulators, and livestock feed
additives. 921
Percolation: Percolation is the movement of water through the soil, and it’s layers, by
gravity and capillary forces. 922
Permaculture: The goal of permaculture is to produce an efficient, low-maintenance
integration of plants, animals, people and structure Strong emphasis is placed on
design, the location of each element in a landscape, and the evolution of landscape over
time. 923
Permeability: The ability of water to flow through a soil. 924
Point source pollution: Sources of pollution that originate from a single point, such as
a discharge pipe or ditch. 925
Polyculture (Polycropping): Growing two or more crops together. 926
Potash: A mineral that is used primarily as an agricultural fertilizer (plant nutrient)
because it is a source of soluble potassium. 927
Precision agriculture: Precision agriculture is the practice of using remote sensing, soil
sampling, and information management tools to optimize agriculture production. 928
Progeny: A descendant or offspring as in a child, plant, or animal. 929
Regenerative agriculture: see ‘Sustainable Agriculture.’
Salinization: The accumulation of salts. Salinization occurs in warm and dry locations
where soluble salts precipitate from water and accumulate in the soil. Saline soils are
common in desert and steppe climate. 930
Self-pollinate: Self-pollination occurs between two plants via the male and female parts
contained within the same flower or separate flowers on the same plant. 931
Site-Specific Management (SSM): A practice that is being used to control and
document traditional inputs in crop production such as fertilizer, seed, and crop
chemicals. 932
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