Question

2 check all that apply. what are four innovations in farming techniques that led to great productivity? contour plowing crop rotation gas - powered thresher flood - resistant seed underground plowing drought - resistant seed disease control

Explanation:

Contour plowing helps prevent soil - erosion and improve soil quality. Crop rotation enriches soil nutrients. Flood - resistant and drought - resistant seeds can better adapt to adverse environmental conditions and increase yields. Disease control protects crops from diseases, thus enhancing productivity.

Answer:

contour plowing, crop rotation, flood - resistant seed, drought - resistant seed, disease control