Teaching Organic Farming and Gardening

Soil Biology and Ecology

Unit 2.3 | 39

resistant fraction 10% 100:1 C:N

Total in this fraction

600 kg C/ha

6 kg N/ha

Moderately 60% 40:1 C:N 360 kg C per ha in biomass

decomposable Total in this fraction 3240 kg C per ha respired as CO 2

fraction 3600 C (kg/ha) 9 kg N per ha in biomass

90 N (kg/ha) 81 kg N per ha in mineral N

easily 30% 20:1 C:N 360 kg C per ha in biomass

decomposable Total in this fraction 1440 kg C per ha respired as CO 2

fraction 1800 C (kg/ha) 18 kg N per ha in biomass

90 N (kg/ha) 72 kg N per ha in mineral N

153 TOTAL Kg N MINERALIzED PER HECTARE

carbOn and nitrOgen MineraLizatiOn exercise key

Hands-On Exercise Key