Domande riguardo a frasi esempio con, spiegazione d'utilizzo di "Cuerda"s

Q: Come si dice in Inglese (Stati Uniti)? cuerda

Q: Come si dice in Inglese (Stati Uniti)? cuerda

Q: Come si dice in Inglese (Stati Uniti)? cuerda de guitarra

Q: Come si dice in Inglese (Stati Uniti)? cuerda

Q: What does "cuerda" mean in this context?


Context>>>>>>>>>>>>
Poppy farming gave poor farmers an economic self-sufficiency they couldn't have found in Guatemala. That opportunity turned the green hills of the western highlands bright red, as poppy flowers spread.

With profits from growing poppy, neighbors pooled their money to buy cobblestones to pave the rutted dirt roads that were impassable every time it rained hard, Lopez, the farmer, said.

Then last year, Lopez said, everything changed. Police and soldiers sent by the federal government came in and cut down all of the poppy plants. Lopez and the other farmers in this region returned to growing potatoes and other crops. 
Lopez figures he was making about 5,000 quetzales a year, or about $650, growing poppy plants on one 5,000-square-foot cuerda. That was three or four times as much as a cuerda of potatoes. 

At one point, Lopez  estimates, 75 percent of the six cuerdas on his farm were dedicated to growing poppy plants. He wasn’t getting rich. But the money was enough to buy food, clothes, medicine and school supplies for his wife and their three young children.

The loss of revenue from growing poppies was the main reason Lopez decided to leave and join the huge wave of Guatemalans migrating to the U.S.
“Because there is no work here. There is no income,” Lopez said. “And now they took away the poppy. These potatoes are hardly worth anything.”