The effect of earthworm (Lumbricus terrestris) and fertilizer on the growth of Portulaca (Portulaca oleracea) seeds /
Yoo Jung Lee.
- Las Pinas City : SISC, 2012.
- 25 pages : illustrations ; 28 cm.
6 Perseverance AY 2011-2012
Includes bibliographical references.
Soil fertility--Biological aspects. Earthworms--Soil influence. Fertilizers--Effect on plants. Plant-soil relationships.