Awale, R., S. Machado, R. Ghimire, P. Bista. Soil Health. Chapter 2 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.
Bista P., S. Machado, R. Ghimire, G. Yorgey, D. Wysocki. 2017. Chapter 3 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.