Solvent action of nitrification and sulfofication

Cover title.Bibliography: p. 257.Mode of access: Internet

The composition of wheat: influence of various factors on the phosphorus, potassium and nitrogen content of the wheat plant

Cover title.Mode of access: Internet

Sugar beet investigations in 1901

Caption title.Mode of access: Internet

Soil investigations: composition of calcareous and non-calcareous soils (with special reference to phosphorus supply)

Caption title.Mode of access: Internet

Barnyard manure: production, composition, conservation, reinforcement and value

Cover title.Mode of access: Internet

Sulphur in relation to soils and crops

Cover title.Bibliography: p. 255-256.Mode of access: Internet

Relation of phosphorus and nitrogen in soil to the composition of wheat

Cover title.Mode of access: Internet