Efek Sisa dan Tambahan Titonia Terhadap Sifat Kimia Ultisol dan Hasil Tanaman Hasil Tanaman Jagung Pada Musim Tanam Ketiga

Hakim, Nurhayati and Darlis, Irwan and Arfania, Lia (2014) Efek Sisa dan Tambahan Titonia Terhadap Sifat Kimia Ultisol dan Hasil Tanaman Hasil Tanaman Jagung Pada Musim Tanam Ketiga. J. Solum Vol. IV No. I Januari 2007: 5-9 . ISSN 1829-7991

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Abstract

Last researchers repor-ted that Tithonia cliversdbtia (Mexican sunflower.) coulld replace 25oh to 50% of N and K of commercial fertilizer applied in chili production on the first and second planting time in the Ultisols of west sumatra.' A continuation fielcl experirnents rvas conductecJ to find out the the appropriate NK cobination sources should be added on the third season to get the higest yield of rnaize. The treatrnenrs were the combination of NK T. diversfolia + NK commercial fertilizer which is maize needed. There were 9 treatmens such as A(0%+ 0%): B(0%+0%); c(50%+25%); D (50%+5s%); E(25%+75%); F(25%+75%); G(50%%+50%); H(50%%+50%):5and control (0+100%). The results showed thai integrated use 50% NK frorn tithonia with25% NK from commercial fertilizer is the appropriate NK cornbination to get the higest yield (5ton ha-r)of maize orr the third season in ultisols, if on the first season lor chili planting time have reseived as 50% + 50% and on the second season fbr chili planting as much 25%+15% NK from titonia and NK from commercial fertilizer.

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