Artikel dari Penerbit "University of Lampung"

Penerbit: University of Lampung

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Ditemukan 665 artikel.

Temporal Variation and Respons of Mangrove Soil on Solar Illumination Changes

Oleh: Medellu, Christophil, Soemarno, ., Marsoedi, .

Research on soil temperature in mangrove forest is a part of the mangrove ecosystem microclimate research. Studieson microclimate variables interaction, including soil temperature is important and interesting because it is associatedwith ecosystem and environmental changes, and the biota living in i...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 2: May 2012; 165-172

Ecological Diversity of Soil Fauna as Ecosystem Engineers in Small-Holder Cocoa Plantation in South Konawe

Oleh: Kilowasid, Laode Muhammad Harjoni, Syamsudin, Tati Suryati, Susilo, Franciscus Xaverius

Taxa diversity within soil fauna functional groups can affected ecosystem functioning such as ecosystem engineers,which influence decomposition and nutrient cycling. The objective of this study is to describe ecological diversityvariation within soil fauna as ecosystem engineers in soil ecosystem of...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 2: May 2012; 173-180

Soil Bacterial Diversity and Productivity of Coffee - Shade Tree Agro-ecosystems

Oleh: Evizal, Rusdi, Tohari, ., Prijambada, Irfan Dwidja

Coffee productions should have environmental value such as providing high soil microbial diversity while producing high yield. To examine that purposes, two experimental plots were constucted at benchmark site of Conservation and Sustainable Management of Below-Ground Biodiversity (CSM-BGBD), in Sum...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 2: May 2012; 181-187

Root-induced Changes in the Rhizosphere of Extreme High Yield Tropical Rice: 2. Soil Solution Chemical Properties

Oleh: Purnomo, Erry, Choiron, Dodik, Yulia, Raina

Our previous studies showed that the extreme high yield tropical rice (Padi Panjang) produced 3-8 t ha-1 without fertilizers. We also found that the rice yield did not correlate with some soil properties. We thought that it may be due to ability of root in affecting soil properties in the root zone....

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 189-196

The Influnece of Peat Layer on Hidrogen and Aluminium Concentration Originating from the Substratum Sulphidic Materials

Oleh: Fahmi, Arifin Fahmi, Radjagukguk, Bostang, Purwanto, Benito Heru

Much of peatland in Indonesia has sulphidic materials as substratum. Soil acidity and metal elements in peatlandmay originate from the sulphidic materials which occur underneath of the peat layer. Peat soil buffering capacity andchelating ability of the peat materials regulate the soil acidity and m...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 197-202

The Changes of P-fractions and Solubility of Phosphate Rock in Ultisol Treated by Organic Matter and Phosphate Rock

Oleh: Djuniwati, Sri, Nugroho, Budi, Pulunggono, Heru Bagus

Phosphorus (P) is one of the essential elements for plant, however, its availability is mostly very low in acid soils. It is well documented that application of phosphate rock and organic matter are able to change the level of availability of P-form in acid soils.  The objective of the research w...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 203-210

Ferro Content in Soil and Mustard Leave (Brassica Junjea) Treated by Agricultural Waste on the Biosensitizer-Iron Photoreduction

Oleh: Rorong, Johnly Alfreds, Sudiarso, ., Prasetya, Budi

Atom absorption spectrophotometer (AAS) had been used to analyzed Ferro in the soil and in the green mustardleaf (Brassica junjea) treated with phenolics extract from the agricultural wastes of clove leaf (Eugenia aromatica),rice straw (Oryza sativa) and water hyacinth leaf (Eichhornia crassipessolm...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 211-218

Citrate Root Exudation under Zn and P Deficiency

Oleh: Siane, Bless Aplena Elen

Zinc and phosphorus are essential nutrients with low bioavailability in calcareous soils. Some plants exude organicacids to increase the solubility of these two nutrients. The objective of this study was to examine citrate exudation rates of different lupin (Feodora and Energy) and rapeseed (Dunkeld...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 219-225

Plot Scale Phosphorous and Potassium Balances of Newly Opened Wetland Rice Farming Originated from Wetland

Oleh: Sukristiyonubowo, ., Nugroho, Kusumo, Ritung, Sofyan

Development of newly opened wetland rice fields both from dry land and wetland in Indonesia are important to meetrice growing demand, increase soil productivity, keep rural food security and provide jobs as well as generateincome. Most soils of newly opened rice fields are low in P and K contents, b...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 227-237

Response of Some Rice Cultivars in New Opening Paddy Fields with High Fe2+ Using Multi-packet Technology

Oleh: Utama, M Zulman Harja, Wahidi, Ismed, Sunadi, .

The main obstacle to increase rice yield in new opening paddy fields, is that high levels of dissolved ferrous ions(Fe2+) which toxic to plants. This research aimed to study the growth and yield of several rice cultivars tolerant toFe2+ in the new opening paddy fields with multi-packet technology. T...

Sumber: JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 239-244

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