Sentence:  Although the Administration 's program cut crop acreage to the lowest point since 1934 , farmers , with the help of extra fertilizer and good weather , are getting such high yields per acre that many are being <WSD>forced</WSD> to buy new harvesting machines . 
Meaning of the word marked with <WSD> tags:  to cause to do through pressure or necessity, by physical, moral or intellectual means :"She forced him to take a job in the city"