Cassava crop cultivation and harvesting of leaves for ensilage as feed to pigs at the University of Tropical Agriculture Foundation  Finca Ecologica-CAF-Thuduc District, Ho Chi Minh City. Photos by Lylian Rodriguez.
.
Ref.  Lylian Rodriguez, Thomas R Preston and Nguyen Van Lai.1998. Integrated farming systems for efficient use of local resources. In. Proceedings of the Internet Conference on Integrated Bio-Systems. Eds: Eng-Leong Foo & Tarcisio Della Senta. http://www.ias.unu.edu/proceedings/icibs/
.
click here for larger picture click here for larger picture.

Photos 1&2 showing the height of of stem where cutting is done. 
Note: the yellowing of leaves at the bottom is caused by shading by the leaves above.
 click here for larger picture
Photos 3&4 showing rows of cassava plants in the background and 
a row of cut stems after harvesting