Penerbit: University of Lampung
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Penggunaan Metode Bioassay untuk Mendeteksi Pergerakan Herbisida Pascatumbuh Paraquat dan 2,4-D dalam Tanah
Oleh: Sriyani, Nanik, Salam, Abdul Kadir
A simple and cheap method to detect herbicide residue in soil and water is urgently needed as the quantity and frequency of herbicide usage is steadily increasing in Indonesia which raises concern about the effects of herbicide residue in soil and water. This study is the third step from a serie...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 199-208
Pemanfaatan Tithonia Diversifolia pada Tanah Sawah yang Dipupuk P Secara Starter terhadap Produksi serta Serapan Hara N, P, dan K Tanaman Padi
Oleh: Gusnidar, ., Prasetyo, Teguh Budi
The research of Tithonia diversifolia utilization in the paddy soil that was fertilized P-starter on yield and N, P, K uptake on rice crop, has been conducted from August to December 2005. The objective of this research was to determine interaction between P-starter levels, and tithonia levels o...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 209-216
Kandungan Nitrogen dan Bobot Biji Kentang yang Diberi Pupuk Organik Difermentasi, Azospirillum Sp., dan Pupuk Nitrogen di Cisarua, Lembang, Jawa Barat
Oleh: Nurmayulis, ., Maryati, .
A research was conducted to study response of potato (Solanum tuberosum L.) plant to the application of fermented organic matter (‘porasi’) (0, 7.5, 15.0, and 22.5 t ha-1), without or with inoculation of Azospirillum sp., and N fertilizer (0, 86, 172, and 258 kg ha-1 N) and also to ...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 217-224
Perubahan Populasi Protozoa dan Alga Dominan pada Air Genangan Tanah Padi Sawah yang Diberi Bokashi Berkelanjutan
Oleh: Niswati, Ainin, Dermiyati, ., Arif, Mas Achmad Syamsul
Protozoa and alga play important roles in biogeochemical nutrient cycles in freshwater environment, especially in the paddy fields. The changes from the conventional technologies to organic technologies will change the communities structures of organisms lived in the paddy fields environment.�...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 225-231
Identifikasi dan Kuantifikasi Metabolit Bakteri Pelarut Fosfat dan Pengaruhnya terhadap Aktivitas Rhizoctonia solani pada Tanaman Kedelai
Oleh: Setiawati, Tri Candra, Mihardja, Paniman Asna
Phosphate solubilizing bacteria (PSB) metabolites are organic acids, phosphomonoesterase enzyme (alkaline phosphatase) and antibiotic, which is able to dissolve insoluble phosphate. Phosphate solubilizing bacteria used in this study was expected to suppress Rhizoctonia solani attacks. This experimen...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 233-240
Studi Hifa Eksternal CMA dalam Memahami Fungsinya Mengkontribusi Serapan P Tanaman Menggunakan Metode Thin Section
Oleh: Effendy, Machfud, Wijayani, Bhakti Wisnu
The study of the external hyphae of AMF was conducted for getting data of the soil hyphae distribution from the observation using thin section preparation. The experiment was arranged in factorial fully randomized design. The 1st factors are dosages of P application: 0; 45; 90; 135; and 180 kg ha-1....
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 241-252
Konversi Hutan Menjadi Lahan Usahatani Karet dan Kelapa Sawit serta Pengaruhnya terhadap Aliran Permukaan dan Erosi Tanah di DAS Batang Pelepat
Oleh: Sunarti, ., Sinukaban, Naik, Sanim, Bunasor
Forest conversion to some land use happened in all watershed, includes Batang Pelepat watershed. The objectives of this research are to know effect of forest conversion to land of rubber (Hevea brasiliensis) and palm oil (Elaeis guinensis Jack) farming on run off and soil erosion and different of er...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 253-260
Effect of Oxalic Acid, Na+, NH4+, and Fe3+ on Release of Fixed Potassium and Basal Distance of Smectite in Smectitic Soils
Oleh: Nursyamsi, Dedi
Laboratory experiment aimed to study effect of oxalic acid, Na+, NH4+, and Fe3+ on the release of fixed potassium and basal distance of smectite in smectitic soils was conducted in Laboratory of Soil Sciences, Graduate School of Agriculture, Kyoto University, Japan. The experiment used four of topso...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 177-184
Use of Plant Derived Ash as Potassium Fertilizer and Its Effects on Soil Nutrient Status and Cocoa Growth
Oleh: Baon, John Bako
Analternative to replacing the expensive potassium (K) fertilizers, such as KCl, should be investigated by Indonesia as the third largest cocoa (Theobroma cacao L.) producing country. The objective of this study is to investigate the effect of plant derived ash (PDAsh) application on soil nutrient s...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 185-193
Kandungan Fosfor Tanaman Padi dan Emisi Karbon Tanah Gambut yang Diaplikasi dengan Amelioran Fe3+ dan Fosfat Alam pada Beberapa Tingkat Pemberian Air
Oleh: Nelvia, .
The addition of ameliorant Fe3+ and rock phosphates containing high Fe cation can reduce effect of toxic organic acids, increase peat stability through formation of complex compounds and reduce carbon emission. The research was conducted in the laboratory and green house of the Departement of Soil S...
Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 195-204