Radical 土
15 strokes
earth 土 (54a) + used to be 曾 (672a) = increase 增
增加 (325) zēngjiā to increase
[增长 (172) zēngzhǎng to increase, grow]

(A farmer looks at a handful of soil) the earth used to be arid and barren, but he’s enriched it and increased the crop yield tremendously. / [DIY pronunciation]