Arai Helmet Limited (株式会社 アライヘルメット, Kabushiki-gaisha Arai Herumetto) is a Japanese company that designs and manufactures motorcycle helmets and other helmets for motorsports.The business has roots from the turn of the century involving cap production, followed by military headgear from 1930 onwards, industrial safety helmets after World War II, and finally motorcycle helmets from 1952 onward.
Summary This paper reports the changes in soil chemical and physical properties, and in the populations and diversity of the soil macrofauna and mesofauna that occurred during the 10 years (1976-1986) following the initiation of nature farming practices on this once chemically-managed field in Northern Japan.
