Answer: The staple crop of south Carolina after 1960 was rice
Explanation:
The long growing season and warm, damp climate of the Southern state made the region perfect for growing rice.
Source: https://getd.libs.uga.edu/pdfs/smith_hayden_r_201212_phd.pdf
https://www.lcsd.wednet.edu/cms/lib/WA01001184/Centricity/Domain/14/The%20Southern%20Colonies%20.pdf