div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imagea href=https:reader042vdocumentsusreader042viewer2022020522575067e21a28ab0f07ad981ehtml5page1jpg target=_blank img data-url=soil-conservation-579909f450628htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Soil Conservation loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader042vdocumentsusreader042viewer2022020522575067e21a28ab0f07ad981ehtml5thumbnails1jpg width=140 height=200 adivp© 1940 Nature Publishing Grouppdiv