Answer:
o the effects of the drought
Step-by-step explanation:
The most serious problem affecting agriculture in Washington in the 1920s and 1930s is the drought condition because drought condition decrease the productivity of the crop. Water is the main material needed by the plants to absorb nutrients and transportation of materials inside the plant body so decrease occurs in the productivity of crops due to unavailability of water for the crops is the most serious problem for agriculture in Washington.