Triticum compactum erinaceum Triticum compactum erinaceum Triticum compactum erinaceum, also called California Club Wheat or Mayview wheat, is an extinct subspecies of the hexaploid club wheat Triticum compactum. "T. compactum erinaceum" was a bearded, hairy rachis, red-chaffed wheat named for its appearance similar to that of a hedgehog. "T. compactum erinaceum" was thought to have disappeared before 1822. However data from the United States Department of Agriculture indicates two additional specimen that were discovered and identified as "T. compactum erinaceum" more than a hundred years after their presumed disappearance. The new specimen indicate that "T. compactum erinaceum" was grown in the United States
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