Penelitian Ini Bertujuan Untuk Mengetahui Dosis Pupuk Kotoran Ayam Dan Pupuk Organik Cair Ageratum Conyzoides Yang Tepat Untuk Tanaman Jagung. Penelitian Ini Dilaksanakan Pada Bulan April – Juni 2018 Di Kebun Eugenius (Kawasan Sekitar Universitas Borneo Tarakan) Belakang Asrama Katholik Pantai Amal Kota Tarakan. Metode Yang Digunakan Adalah Rancangan Acak Kelompok (RAK), Terdiri Dari Enam Perlakuan Dan Empat Ulangan. Dosis Perlakuan Yang Digunakan Yaitu P0 (Kontrol), P1 (Pupuk Organik Cair Ageratum Conyzoides 30 Ml), P2 (Pupuk Organik Cair Ageratum Conyzoides 15 Ml), P3 (Pupuk Kotoran Ayam 280 G), P4 (Pupuk Kotoran Ayam 280 G + Pupuk Organik Cair Ageratum Conyzoides 30 Ml), P5 (Pupuk Kotoran Ayam 280 G + Pupuk Organik Cair Ageratum Conyzoides 15 Ml). Hasil Penelitian Menunjukkan Bahwa Dosis Perlakuan Yang Berbeda Berpengaruh Nyata Terhadap Tinggi Tanaman 3, 4, 5, 6, 7 MST, Jumlah Daun 3, 4, 5, 6, 7 MST, Berat Tongkol Dengan Kelobot, Berat Tongkol Tanpa Kelobot, Diameter Tongkol, Panjang Tongkol, Jumlah Baris Biji Pertongkol, Jumlah Tongkol Pertanaman, Berat 100 Biji, Berat Segar Tanaman, Berat Kering Tanaman, Tetapi Berpengaruh Tidak Nyata Terhadap Tinggi Tanaman 2 MST Dan Jumlah Daun 2 MST. Perlakuan Terbaik Pada Penelitian Ini Adalah Perlakuan P5 (Pupuk Kotoran Ayam 280 G + Pupuk Organik Cair Ageratum Conyzoides 15 Ml). Kesimpulan Dari Penelitian Ini Adalah Perlakuan P5 (Pupuk Kotoran Ayam 280 G + Pupuk Organik Cair Ageratum Conyzoides 15 Ml) Merupakan Perlakuan Yang Memiliki Nilai Tertinggi Dibandingkan Dengan Perlakuan P0, P1, P2, P3, Dan P4. Saran Dari Penelitian Ini Adalah Perlu Adanya Penelitian Lanjutan Mengenai Efektifitas Ageratum Conyzoides Terhadap Produktifitas Tanaman Sehingga Dapat Mengurangi Penggunaan Pupuk Kimia Serta Dapat Mengoptimalkan Pemanfaatan Gulma.
Kata Kunci: Ageratum Conyzoides, Jagung, Kotoran Ayam

This Study Aims To Determine The Dosage Of Chicken Manure And Liquid Organic Fertilizer By Ageratum Conyzoides Which Is Appropriate For Corn. This Research Was Carried Out In April - June 2018 In The Eugenius Garden (Area Around The University Of Borneo Tarakan) Behind The Catholic Charity Beach Of Tarakan City. The Method Used Was A Randomized Block Design (RBD), Consisting Of Six Treatments And Four Replications. The Treatment Dose Used Is P0 (Control), P1 (Ageratum Conyzoides Liquid Organic Fertilizer 30 Ml), P2 (Ageratum Conyzoides 15 Ml Liquid Organic Fertilizer), P3 (Chicken Manure 280 G), P4 (Chicken Manure 280 G + Fertilizer Liquid Organic Ageratum Conyzoides 30 Ml), P5 (Chicken Manure 280 G + Liquid Organic Fertilizer Ageratum Conyzoides 15 Ml). The Results Showed That Different Treatment Doses Significantly Affected Plant Height On 3, 4, 5, 6, 7 Weeks After Planting, Number Of Leaves On 3, 4, 5, 6, 7 Weeks After Planting, Weight Of Cob With Corn Husk, Weight Of Cob Without Corn Husk, Diameter Of Cob, The Length Of The Cob, Number Of Seed Row, Number Of Cobs Crop, Weight Of 100 Seeds, Fresh Weight Of Plants, Dry Weight Of Plants, But No Significant Effect On Plant Height On 2 Weeks After Planting And Number Of Leaves On 2 Weeks After Planting. The Best Treatment In This Study Was The Treatment Of P5 (Chicken Manure 280 G + Liquid Organic Fertilizer Ageratum Conyzoides 15 Ml). The Conclusion Of This Study Is The Treatment Of P5 (Chicken Manure 280 G + Liquid Organic Fertilizer Ageratum Conyzoides 15 Ml) Is The Treatment That Has The Highest Value Compared To Treatment P0, P1, P2, P3, And P4. Suggestions From This Study Are The Need For Further Research About The Effectiveness Of Ageratum Conyzoides On Plant Productivity So That It Can Reduce The Use Of Chemical Fertilizers And Can Optimize The Utilization Of Weeds. Keywords: Ageratum Conyzoides, Corn, Chicken Manure