The universal soil loss equation “A = R x K x L x S x C x P” was formulated by _____ in 1929?

Question: The universal soil loss equation "A = R x K x L x S x C x P" was formulated by _____ in 1929?

Options:

Arnon
Wischmeier
Subbiah
Walkeley

✅Explanation:
The universal soil loss equation (USLE) was formulated by W.H. Wischmeier in 1930, along with D.D. Smith.