Contour plowing is a soil conservation method that involves

It involves plowing across hill slopes to prevent soil erosion.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

i dont know this but ask your teacher for !