div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: The Third International Congress of Soil Science src=https:reader030vdocumentssitereader030viewer2022021322575067d41a28ab0f07ad55e0html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1935 Nature Publishing Grouppdiv