Context: Some evidence shows that alternatives to pesticides can be equally effective as the use of chemicals. For example, Sweden has halved its use of pesticides with hardly any reduction in crops.[unreliable source?] In Indonesia, farmers have reduced pesticide use on rice fields by 65% and experienced a 15% crop increase.[unreliable source?] A study of Maize fields in northern Florida found that the application of composted yard waste with high carbon to nitrogen ratio to agricultural fields was highly effective at reducing the population of plant-parasitic nematodes and increasing crop yield, with yield increases ranging from 10% to 212%; the observed effects were long-term, often not appearing until the third season of the study.

Question: How much was Sweden able to lower thier pesticide usage?
Answer: halved its use

Question: What other country has reduced its pesticide usage?
Answer: Indonesia

Question: What natural substance has been found to effectively increase crop yields
Answer: carbon to nitrogen

Question: What amount of gain in crops can be contributed to application of composted yard waste?
Answer: 10% to 212%

Question: What happened after Indonesia cut its pesticide use in half?
Answer: Unanswerable

Question: What happened when they reduced pesticide use by 65% in Sweden?
Answer: Unanswerable

Question: How long did it take to see a higher crop yield in Sweden when studied?
Answer: Unanswerable

Question: What was the range of yield increases in Sweden during the study?
Answer: Unanswerable

Question: What kind of crops were studied in Sweden?
Answer: Unanswerable