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The seed bank is one of the key factors for the persistence and density fluctuations of plant populations, especially for annual plants. [4] Perennial plants have vegetative propagules to facilitate forming new plants, migration into new ground, or reestablishment after being top-killed, which are analogous to seed bank in their persistence ability under disturbance.
A shade house is a horticultural structure which provides a mix of shade and light to provide suitable conditions for shade-loving plants, or to reduce the temperatures under the cover. Typically it will have a frame which supports mesh fabric or wood lath. [1] Shade houses may also be used in commercial horticulture.
The Morrow Plots is an experimental agricultural field at the University of Illinois Urbana-Champaign. Named for Professor George E. Morrow , it is the oldest such field in the United States [ 3 ] and the second oldest in the world. [ 4 ]
Although it is rarely used alone, plants can flourish from mixed soil that includes a mix of compost with other additives such as sand, grit, bark chips, vermiculite, perlite, or clay granules to produce loam. Compost can be tilled directly into the soil or growing medium to boost the level of organic matter and the overall fertility of the soil.
Plant domestication is seen as the birth of agriculture. However, it is arguably proceeded by a very long history of gardening wild plants. While the 12,000 year-old date is the commonly accepted timeline describing plant domestication, there is now evidence from the Ohalo II hunter-gatherer site showing earlier signs of disturbing the soil and cultivation of pre-domesticated crop species. [8]