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Evaluation for the Potential Use of Silicate Rocks from FourVolcanoes in Indonesia as Fertilizer and Soil Ameliorant
Oleh: Priyono, Joko, Sutriono, Raden, Arifin, Zaenal
Silicate rocks, the abundant plant nutrient source in Indonesia, have not been evaluated for use as a fertilizer/and soil ameliorant. This research was aimed to identify (1) mineral and elemental compositions of silicate rocks originated from Galunggung, Kelud, Tambora, and Rinjani Volcanoes and (2)...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
The Long-Term Effect of Blanket Phosphorus Fertilizer Application on the Available P Content in Sawah Soils; Comparative Study in Java, Indonesia
Oleh: Darmawan, ., Kyuma, Kazutake, Masunaga, Tsugiyuki
In order to evaluate the effects of long-term phosphorus fertilizer application on the sawah soils, a comparative study was conducted in Java Island as a pioneer of Green Revolution (GR) technology application in Indonesia. Soil samples taken in 1970 by Kawaguchi and Kyuma were compared with new sam...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Reaksi Pemasaman Senyawa Pirit pada Tanah Rawa Pasang Surut
Oleh: Priatmadi, Bambang Joko, Haris, Abdul
Most of swamp soils in tidal land are Acid Sulfate Soils. Acid sulfate soils are the common name given to soils containing iron sulfides (pyrite). The soils are characterized by very low pH and high amount of soluble S and Fe, resulted from oxidation of pyrite when soils are drained. This study ...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Phosphorus Sorption Characteristics of Red Soils from Lampung, West- and Central Java
Oleh: Siradz, Syamsul Arifin
Phosphorus Sorption Characteristics of Red Soils from Lampung, West- and Central Java (S.A. Siradz and R.J. Gilkes): Red soil is a common name used to identify any soil showing yellowish to reddish colour, these soils mainly occur in tropical and subtropical regions. The term is frequently used to c...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
NH4+, dan Fe3+ terhadap Ketersediaan K Jerapan dan Pengaruh Na+, NH4+ pada Tanah-tanah yang Didominasi Mineral Liat Smektit
Oleh: Nursyamsi, Dedi, Idris, Komaruddin, Sabiham, Supiandi
Total content of potassium in smectitic soils is commonly high, however its availability for plant growth is frequently problem because it is fixed at interlayer space of 2:1 type of clay mineral. The research was  aimed to study the sorption and effect of Na+, NH +, and Fe3+  on soil availabl...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Nitrogen Nutrition of Some Local Rice Varieties Grown without Fertilizer on Acid Sulphate Soil Area in South Kalimantan
Oleh: Purnomo, Erry, Hasegawa, Toshihiro, Hashidoko, Yasuyuki
Banjarese farmers in South Kalimantan apply a very minimum nitrogen (N) fertilizer in growing local rice. This practice has been adopted for many years. Yet, the grain yield level at farmers’ field is not necessary low. We are questioning about N sources for the crop. This study only focuses ...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Pertumbuhan dan Hasil Jagung yang Dipupuk N, P, dan K pada Tanah Vertisol Isimu Utara Kabupaten Gorontalo
Oleh: Nurdin, ., Maspeke, Purnamaningsuh, Ilahude, Zulzain
The fertilizer availability as source of N, P, and K nutrient where plant responsif was difficult found by farmer. Thefore, It was needed information about nutrient availability in soil properties to know nutrient deficiency of its by maize as plant indicator. The objective of this research ...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Penentuan Kurva Retensi Air Tanah Laboratorium dengan Sensor Resistensi dan Kapasitansi
Oleh: Bowo, Cahyoadi, Hasan, Mohammad, Marhaenanto, Bambang
A soil water retention curve determination method is developed based on the use of gipsblock and capacitance sensors. The objective of the research was to provide a simple and quick method in characterization of soil water retention in the laboratory based on resistance and capacitance sensors. Undi...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Population of Rhizobium bacteria in the soil at several plant from Buton island, Muna regency, Southeast Sulawesi
Oleh: Purwaningsih, Sri
The research was conducted in order to know population of Rhizobium bacteria in the soil at several plant from Buton island, Muna regency, Southeast Sulawesi. The purpose of the study was to get the population data and pure cultures of Rhizobium bacteria.Rhizobium bacteria were isolated from 13 samp...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009
Pemanfaatan Bakteri Selulolitik dan Xilanolitik yang Potensial untuk Dekomposisi Jerami Padi
Oleh: Nur, Hasrul Satria, Meryandini, Anja, Hamim, .
There were 3 prospective isolates of cellulolytic bacteria resulted from the total of 31 isolates we found, i.e. C4-4, C5-1, and C11-1. Four combinations of bacteria including C4-4 + Xilanolytic (A), C5-1 + Xilanolytic (B), C11-1 + Xilanolytic (C), 45I-3 + 234P-16 (D), and control (E, without ba...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 January 2009