Gatot Pramuhadi

Dosen Departemen Teknik Mesin & Biosistem, IPB, Bogor, Indonesia

Dymaz Gonggo Yuda Arditha

Alumnus Departemen Teknik Mesin & Biosistem, IPB, Bogor, Indonesia

DOI: 

ABSTRACT 

Plants can grow and reach maximum production on optimum soil condition. Plants growth and agricultural machines application in farm fields were influenced by physical, chemical, and mechanical properties of soil. Granule organic fertilizer (GOF) application with a certain dosage could influence physical, chemical, and mechanical properties of soil. The objective of the research was to analyse interaction relationship between physical and mechanical soil properties alterations on GOF dosages variation. Soil consistency test, compaction test (Proctor’s test), and direct shear test were applied to soil samples on GOF dosages variation. Research results showed that the increasing of GOF dosages from 0 ton/ha up to 90 tons/ha would increase soil posity of (49.43-55.85)%, soil moisture content of (24.14-49.97)%, plastic limit of (35.96-41.82)%, and liquid limit of (56.01-61.75)%, but it would decrease maximum soil dry bulk density of (1.34-1.17) g/cc. Soil shear strength decreased from (0.91-1.41) kgf/cm2 down to (0.42-0.58) kgf/cm2 by the decreasing of soil dry bulk density of (1.14-1.09) g/cc and soil cohesion of (0.68-0.34) kgf/cm2 which resulted by the increasing of the GOF dosages.

Keywords: soil shear strength, granule organic fertilizer, soil density, and soil cohesion

REFERENCES

Arditha DGY (2011). Kekuatan Geser Tanah Pada Berbagai Dosis Penambahan Pupuk Organik Granul [Skripsi]. Bogor: Departemen Teknik Mesin dan Biosistem, Fakultas Teknologi Pertanian, Institut Pertanian Bogor.

Barger EL, Liljedahl JB, Carleton WM, and McKibben EG (1963). Tractors and Their Power Units. Second Edition. John Wiley & Sons, Inc., New York

Baver LD, Gardner WH, Gardner WR (1972). Soil Physics. Ed ke-4. New Delhi : Wiley Eastern Limited.

Braja MD, Endah N, Mochtar IB (1993). Mekanika Tanah (Prinsip-prinsip Rekayasa Geoteknis) Jilid I. Jakarta: Penerbit Airlangga.

Bekker MG (1955). A Proposed System of Physical and Geometrical Terrain Values for the Determination of Vehicle Performance and Soil Trafficability. Paper presented at the Interservice Vehicle Mobility Symposium, Stevens Institute of Technology, April 18 – 20.

Davies DB, Eagle DJ, Finney JB (1993). Soil Management. Ed ke-5. New York: Farming Press.

Hardjowigeno S (1995). Ilmu Tanah. Bogor: Jurusan Ilmu Tanah, Fakultas Pertanian, Institut Pertanian Bogor.

McKyes E (1985). Soil Cutting and Tillage. Amsterdam, Netherlands: Elsevier Science Publisher.

Pramuhadi G (2005). Pengolahan Tanah Optimum pada Budidaya Tebu Lahan Kering. [Disertasi]. Bogor: Sekolah Pascasarjana, Institut Pertanian Bogor

Wesley LD (1973). Mekanika Tanah. Jakarta : Badan Penerbit Pustaka Umum.