キリマンジャロ農業研修センター（KATC）で実施中の試験で収量調査です．円形坪刈器を利用しているため，区画毎に円形の穴が開いているように見えます．KATCのPeter Alfredさんが写真を送ってくれました．

Yields were measured in our field experiments at the Kilimanjaro Agricultural Training Centre (KATC). Plants in each experimental plot were harvested in a circle so that each plot appears to have a hole at the center. Mr. Peter Alfred sent us some photos showing his sampling activity.