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
Crop residue whereas cereal straw would reduce next year's soil supply of available nutrients. Over time, the nutrients fixed by soil microbes and humus are released and available to crops. Nutrients from residue are not fully recovered by crops. Just like fertilizer nutrients, nutrients released from crop residue into the soil are susceptible to losses such as leaching (N and S), denitrification (N), immobilization (N, P, K and S), and fixation (P and K). The efficiency of nutrient uptake by crops from fertilizers or residue release is generally thought to be similar. For example, about 50 percent recovery of N in the