Artikel dari Penerbit "University of Lampung"

Ditemukan 665 artikel.


Impact of Rainforest Conversion on Surface Runoff and Soil Erosion in Nopu Upper Catchment of Central Sulawesi

Oleh: Hidayat, Yayat, Sinukaban, Naik, Pawitan, Hidayat

Rainforest conversion into agricultural lands in Nopu Upper Catchment such as cocoa plantations, maizes, cassava, peanuts, and scrub and bush were significantly increase soil erosions and surface runoffs, which in turn will decrease crops productivity and hydrologic functions of watershed.  Soil ...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 59-65

Sustainable Dry Land Management Model on Corn Agribusiness System

Oleh: Pujiharti, Yulia, Haridjaja, Oteng, Eriyatno, .

The study aimed at building model of dry land management.  Dynamic System Analysis was used to build model and Powersim 2.51 version for simulating.  The parameter used in model were fertilizer (urea, SP-36, ACL), productivity (corn, cassava, mungbean), soil nutrient (N, P, K), crop nutrient r...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 67-76

Andisols from Tondano Area, North Sulawesi: Properties and Classification

Oleh: Hikmatullah, .

Three pedons of Andisol (TN-1, TN-2 and TN-3) developed from young volcanic materials of the Lokon, Soputan, and Lengkoan volcanoes respectively in the Tondano area, North Sulawesi, were studied in the field, and 18 soil samples were analysed in the laboratory for physical, chemical, and mineralogic...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 77-85

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)...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 1-8

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...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 9-18

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 ...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 19-24

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...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 25-31

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...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 33-40

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 ...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 41-47

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 ...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 49-56