Deep plowing is a plowing to a depth greater than 50 cm (20 in) as compared to ordinary plowing which rarely exceeds 20 cm (8 in). The purpose of deep plowing is to modify the soil water retention characteristics over the long term. In one long term test, lasting 35 years, the mean annual grain yield was 2,800 lbs per acre (3,138 kg per ha) with deep plowing, which was 10% greater than the 2,550 lbs per acre (2,858 kg per ha) yield in unplowed plots.
There is a movement away from plowing altogether, and from deep plowing in particular. The theory is that this will stop the loss of topsoil, increase the organic content of soil and reduce runoff of fertilizer and pesticides into rivers. Another part of the no-plowing theory is that ground moisture would be conserved; but this was shown to be incorrect by a 35-year study.
Deep or The Deep may refer to:
Deep (previously Deep2001) is a Japan-based mixed martial arts promoting and sanctioning organization. It is promoted by Shigeru Saeki who is also the former Public Relations Director of Pride Fighting Championships. Their inaugural event took place in 2001 and featured Paulo Filho and Royler Gracie. On May 17, 2008, Deep announced a partnership with ZST to share fighters, co-promote shows and eventually unify the promotions.
Deep was established in 2000 as "Deep 2001", and the first event was promoted on January 8, 2001. In 2003, Deep 2001 changed its name to Deep.
Deep started playing the role of a subcontractor for Pride Fighting Championships since Dream Stage Entertainment (DSE) started promoting the Pride Bushido series in September 2003, which focused training Japanese fighters at middleweight and lightweight. As a result, a number of Japanese fighters, such as Ryo Chonan and Ikuhisa Minowa, started their careers fighting in DEEP before moving on to larger and more famous MMA promotions.
Deep is a given name which may refer to: