Читать книгу Applied Soil Chemistry - Группа авторов - Страница 14

1 petagram (Pg) = 10¹⁵ grams = 1 gigatonne

1 kilogram (kg) of carbon is equivalent to 44/12 of carbon dioxide

1 hectare (ha) = 107,639 square feet = 10,000 square meters

1 acre = 43,560 square feet = 4047 square meter

10,000 parts per million (ppm) = 1%

CO₂ = carbon dioxide

NPP = net primary production