Triticum compactum Triticum compactum Triticum compactum or club wheat is a species of wheat adapted to low-humidity growing conditions. "T. compactum" is similar enough to common wheat ("T. aestivum") that it is often considered a subspecies, "T. aestivum compactum". It can be distinguished by its more compact ear due to shorter rachis segments, giving it its common name. In the United States of America, nearly all "T. compactum" is grown in dry areas of the Pacific Northwest. "T. compactum" is a hexaploid with 21 chromosomes. "T. compactum", like other club wheats, has been selectively bred for its lower protein content. Due to
Cover crop recycle soil nitrogen already present. The catch crops take up surplus nitrogen remaining from fertilization of the previous crop, preventing it from being lost through leaching (Morgan et al. 1942), or gaseous denitrification or volatilization (Thorup-Kristensen et al. 2003). Catch crops are typically fast-growing annual cereal species adapted to scavenge available nitrogen efficiently from the soil (Ditsch and Alley 1991). The nitrogen tied up in catch crop biomass is released back into the soil once the catch crop is incorporated as a green manure or otherwise begins to decompose. An example of green manure use comes from Nigeria, where the