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...spread use of chemical herbicides, [[cultural controls]], such as altering soil pH, salinity, or fertility levels, were used to control weeds. Mechanical c ...ad it is carried deep into the soil by rainfall causing the aforementioned contamination. Atrazine is said to have ''high carryover'', a very undesirable property

...lgific talus slopes]], or on cool, streamside sites. These areas have cool soil conditions, cold air drainage, or cold groundwater flowage. On algific talu * Habitat Loss or Degradation - Threats to northern monkshood include contamination and filling of sinkholes, grazing and trampling by livestock, human foot tr

...seed hibernation|hibernation]] capabilities, and can last for years in the soil. The seeds, as well as the entirety of this plant, are also [[hallucinogeni ...ium|cotton]], it is a pest in cotton fields. It is also a potential [[seed contamination|seed contaminant]].

...in color, born in small, rounded bunches (umbels) near the surface of the soil. Each flower is partly enclosed in two green bracts. The hermaphrodite flow ...Asian centella, the plant frequently suffers from high levels of bacterial contamination, possibly from having been harvested from sewage ditches. Because the plan

...n to [[plant]]s to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by [[foliar feeding]], for uptake through le ...ess]], which produces [[ammonia]]. This ammonia is applied directly to the soil or used to produce other compounds, notably [[ammonium nitrate]] and [[urea

...cts and services largely to that urban area. (* Natural resources refer to soil, water, genetics, air and solar energy.) ...which can be costly to address. However, strategies exist to improve the soil quality safely [http://www.ruaf.org/node/1003] while still meeting the food

...=2 | pages=97-105}}</ref> with the additional effect that more life in the soil allows for higher water retention. This helps increase yields for farms in ...ontaminant]]s, whose impact may endure for decades, and adversely affect [[soil conservation]] <ref>[http://www.epa.gov/superfund/programs/er/hazsubs/sourc

...the soil''. A literal reading of the English word yields: ''tillage of the soil of a field''. In modern usage, the word ''agriculture'' covers all activiti ...chemical insecticides (see [[pest control]]), and chemical [[fungicides]], soil makeup, analysis of agricultural products, and nutritional needs of farm an

...in color, born in small, rounded bunches (umbels) near the surface of the soil. Each flower is partly enclosed in two green bracts. The hermaphrodite flow ...Asian centella, the plant frequently suffers from high levels of bacterial contamination, possibly from having been harvested from sewage ditches. Because the plan

...e taken to not eat plants that grow in areas where there is known chemical contamination or water pollution. Plants that grow on the side of high-traffic roads shou

...be very little loss. They should never be set in the open ground when the soil is cold, as in fall or winter. If the offshoots are to be taken off at that ...above the soil for a considerable length of time, and later left until the soil becomes exceedingly dry and baked by the sun. Such extremes sometimes serio

...ccessed by a long taproot, or an ability to live on previously uninhabited soil types. For example, [[barb goatgrass]] (''Aegilops triuncialis''), can be ...In allelopathy, a plant will secrete chemicals which make the surrounding soil uninhabitable, or at least inhibitory, to other plant species.

...6). If one of these trees is transplanted while young, from sterile barren soil to moist rich land, it assumes the tall columnar habit as a result of the e ...which grow to a height of 3 to 6 feet, depending upon the richness of the soil. At this time there was found in California, a small dwarf sweet pea plant

...ain intact and send hypha3 through the root-hairs of the papillae into the soil. New papilla with long absorbing hairs are soon developed and the cotyledon ...handling of the seeds, all possible precaution should be taken to prevent contamination.