tepid

1960s

13159_22895_Agricultural_Conservation4

Scientists are testing the groundwater with beakers and a machine with…

1960s

13159_22895_Agricultural_Conservation1

A tepid and dirty canal has a special rake running through it to…

1960s

13159_22895_Agricultural_Conservation2

Aerial shots of USDA canal projects are followed buy some scientists…

1960s

13159_22895_Agricultural_Conservation3

In a factory, a flow of bell peppers is flowing past some female…