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The rhizosphere is the thin area of soil immediately surrounding the root system. It is a densely populated area in which the roots compete with invading root systems of neighboring plant species for space, water, and mineral nutrients as well as form positive and negative relationships with soil-borne microorganisms such as bacteria, fungi and insects.
Oats can grow in most fertile, drained soils, being tolerant of a wide variety of soil types. Although better yields are achieved at a soil pH of 5.3 to 5.7, oats can tolerate soils with a pH as low as 4.5. They are better able to grow in low-nutrient soils than wheat or maize, but generally are less tolerant of high soil salinity than other ...
Soil microorganisms also decrease pathogen and pest activity through competition. In addition, plants produce root exudates and other chemicals which manipulate their soil environment as well as their weed environment. Thus rotation allows increased yields from nutrient availability but also alleviation of allelopathy and competitive weed ...
Buckeye rot of tomato is soil-borne and therefore affects fruit lying on, or close to, the soil. [2] The fungi are spread by surface water, spattering rain, and furrow irrigation. [ 1 ] While it can sexually reproduce through the production of oospores , its primary form of reproduction is by asexually producing sporangia .
Plant cells have chloroplasts, which contain the protoporphyrinogen oxidase (PPO) enzyme complex. PPO inhibitors poison that enzyme, causing a build up of Protoporphyrin IX (Proto) . Normally Proto is present in very low amounts, but when there is too much Proto it interacts with light to form singlet oxygen radicals ( 1 O 2 ).
New tests done by the Environmental Working Group have found 21 oat-based cereals and snack bars popular amongst children to have "troubling levels of glyphosate." The chemical, which is the ...
Nutrients in the soil are taken up by the plant through its roots, and in particular its root hairs.To be taken up by a plant, a nutrient element must be located near the root surface; however, the supply of nutrients in contact with the root is rapidly depleted within a distance of ca. 2 mm. [14] There are three basic mechanisms whereby nutrient ions dissolved in the soil solution are brought ...
Two months after warning consumers that some food products may contain trace amounts of glyphosate, a weed-killing chemical linked to cancer, the Environmental Working Group (EWG) is back with an ...