Use of Chemical and organic fertilizer in Sri Lanka (in Sinhala)

By: Weeraratne, C.SLanguage: Series: Science Education Series ; No.11Publication details: NARESA Colombo ; 1982Description: 56; lkSubject(s): Education | Agriculture
Contents:
http://thakshana.nsf.ac.lk/slstic/NA-104/NA_104.pdf
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