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Pengaruh Pupuk Boron (B) dan Seng (Zn) terhadap Layu Pentil dan Buah Kakao (Theobroma cacao L.) yang dapat dipanen
(IPB (Bogor Agricultural University), 1998)
The experiment was aimed to study the effect of B and Zn on Cherelle wilt and cacao production. The experiment was conducted at Rajamandala Plantation from March to September 1997.