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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...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
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...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
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...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
Correlation between Soil Test Phosphorus of Kaolinitic and Smectitic Soils with Phosphorus Uptake of Lowland Rice
Oleh: Masjkur, Mohammad
Correlation between soil test phosphorus (P) and plant-available P parameters were affected by soil properties, such as soil pH, particle-size composition, and mineralogy. The objectives of this research were: (1) to determine P concentration extracted by several soil P test method in kaolinitic and...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
The Rule of Organic Fertilizer on Fertilizer Efficiency and Requirement Rate for Vegetable Crop on Inceptisols Ciherang, Bogor
Oleh: Widowati, Ladiyani Retno
Utilization of organic fertilizer is an alternative to increase soil health and supply a small amount of plant nutrient. Meanwhile agricultural soil in Indonesia commonly have low organic carbon content (<2%) therefore application of organic fertilizer is recommended. Based on that, the aim of th...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
The effect of NPK Compound (6:16:7) on Chemical Soil Properties of Thapic Epiaquands and Cucumber Yield
Oleh: Sukristiyonubowo, ., Sipahutar, Ibrahim Adamy, Achmad, Ishak
The effect of NPK compound (6:16:7) on chemical soil properties of Thapic Epiaquands, growth and yield of cucumber (Cucumis sativus) has been studied in Punthuk Rejo Village, Karanganyar District. The aims were to study the influence of NPK fertiliser on chemical soil properties, growth and yield of...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
Cellulolitic Activities Of Actinomycetes Isolated From Soil Rhizospere of Waigeo, Raja Ampat, West Papua
Oleh: Nurkanto, Arif
Seven actinomycetes isolated from Waigeo’s soil rhizospere have been characterized in growth, cellulase activities and pH. These actinomycetes were chosen based on their capabilities in cellulose degradation which were recognized by previous study. Those isolates are belonging to Streptomyces...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
Secretion of Organic Acids by Phosphate Solubilizing Bacteria
Oleh: Prijambada, Irfan Dwidya, Widada, Jaka, Kabirun, Siti
Phosphorus availability is a major limiting for crop production. Bacterial solubilization of insoluble inorganic phosphate has been studied as a means of providing available phosphorus for crop production. Bacterial abilities to solubilize calcium phosphate and rock phosphate have been ident...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
Existing of Vesicular Arbuscular Mycorrhizal on The Corn Field Subjected by Long-term Organic and Inorganic Fertilizers
Oleh: Yusnaini, Sri
Existing of vesicular arbuscular mycorrhizal fungi were investigated in continuously cropped, conventional agro ecosystems which had received annual long-term (4 years) amendments of either manure or inorganic fertilizer. The systems had an identical 4–year crops rotation and differed essenti...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009
The Effectiveness of AMF Inoculum to Enhance The Potency of Papuan Crandallite Phosphate Rock and The Growth of Cocoa Seedling
Oleh: Suparno, Antonius
Phosphate rock fertilizer has slow solubility; therefore, it is suitable and more effective to be applied on annual crop plantation. To increase the solubility and the effectiveness of phosphate rock application, inoculation of the Arbuscular Mycorrhyzal Fungi (AMF) is required. Experiments were con...
Penerbit: UNIVERSITY OF LAMPUNG • Publikasi: 01 September 2009