humic acid

noun 0.754

humus

noun 0.598

heme

noun 0.590

hematite

noun 0.567

hemin

noun 0.549

hamate

noun 0.548

biochar

noun 0.540

humectant

noun 0.535

black shale

noun 0.532

haulm

noun 0.519

amate

noun 0.516

homogenate

noun 0.515

limonite

noun 0.512

histone

noun 0.511

hum

noun 0.509

organic matter

noun 0.507

haem

noun 0.506

hectorite

noun 0.505

homocitrate

noun 0.505

hydroxamic acid

noun 0.504

loam

noun 0.504

fumarate

noun 0.502

hemp

noun 0.502

hummus

noun 0.501

sapropel

noun 0.501