Save the Soil, 1932

B/W - Sound - 16 mm - 00:11:00 With no more virgin land to exploit, the United States is faced with the problem of conserving its soil to prevent an agricultural decline. Shows various ways of conserving soil fertility, including terracing and cover-cropping to prevent erosion; crop rotation; use of legumes to build up the nitrogen and humus content of the soil; control of waste caused by fire; use of manures; and commercial fertilizers when necessary.