Discussion
Which of the following statements about Weaver's crop combination method is not correct ?
Answer: C
The statement that is not correct is that Weaver's theoretical curve for a five-crop combination was 25% in each of five crops.
J.C. Weaver (1954) compared the actual percentage shares of crops in an area with theoretical curves in which the land is shared equally: 100% for a monoculture, 50% each for two crops, 33.3% each for three, 25% each for four, and 20% each for five. The combination with the least standard deviation from these values was chosen. So a five-crop combination has 20%, not 25%, in each crop.
The other statements are correct: Weaver first applied the method to the Middle West of the USA, it involves laborious calculations, and Scott modified it to cover crops and livestock together.
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