Main Article Content
Abstract
This research aims to monitor soil water content in the field through the measurement of the electrical impedance during the early period of corn growth in the dry season. Two levels of tillage and four types of mulch were arranged at a split plot design with three replications. Part of experiment plot was cultivated twice and the other part was not cultivated. Each main plot was then divided into four sub-plots of 3 x 4 m each of wich was applied with 100% imperata mulch, 80% imperata and 20% kerinyu mulch, 50% imperata and 50% kerinyu, or 100% kerinyu. Two sets of wire, where the lowest 10 cm part was not isolated, were inserted into 10 and 20 cm soil depth therefore they measured the electrical impedance at the 0-10 and 10-20 cm soil layers. The electrical impedance values were measured using the digital ohm-meter that produce the electrical current at frequency of 1 kHz. Results show that the measured electrical impedance values have a very high sensitivity to the fluctuation of soil water content in the field. When calibrated to the same soil, the values can be transformed into water content values. During the measurement period, the cultivated soil is consistently drier at the 0-10 depth and wetter at the 10-20 depth compared to the uncultivated soil. The combination of 50% imperata and 50% kerinyu mulch maintains higher soil water content uring the dry season compared to other combinations. The research suggests that monitoring of soil water content can be conducted directly in the field through the measurement of electrical impedance.
Article Details
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
References
- Ahuja, L.R., K.E. Johnsen, and G.C. Heathman, 1995. Macropore transport of a surface- applied bromide tracer: model evaluation and refinement. Soil Sci. Soc. Am. J. 59: 1234- 1241.
- Friendman, S. P., 1997. Statistical mixing model for the apparent dieletric constant of unsaturated porous media. Soil Sci. Soc. Am. J. 61: 742-745.
- Gardner, W., 1986. Water content. In A. Klute (ed.): Methods of Soil Analysis. Part 1: Physical and Mineralogical Methods. Second edition. ASA, Inc., SSSA, Inc., Madison, Wisconsin, USA. pp. 493 – 544.
- Hermawan, B., 2001a. Korelasi antara berat volume dan impedensi listrik tanah: I. Percobaan Laboratorium. JIPI.3(1) : 1–8.
- Hermawan, B., 2001b. Korelasi antara berat volume dan impedensi listrik tanah: II. Percobaan Lapangan. JIPI.3(1) : 9–15.
- Hermawan, B., 2004. Penetapan kadar air tanah melalui pengukuran sifat dielektrik pada berbagai tingkat kepadatan. JIPI. 6(2) : 66 – 74.
- Hermawan, B., Z. Bahrum, dan Hasanudin, 2000. Pendugaan nilai kepadatan tanah melalui pengukuran sifat dielektrik: suatu teknik analisis tanah baru berwawasan lingkungan. Laporan Penelitian Hibah Bersaing VIII. Lembaga Penelitian Universitas Bengkulu.
- Kittel, C., 1991. Introduction to Solid State Physics. John Wiley & Sons, Singapore.
- Nadler, A., S. Dasberg, dan I. Lapid, 1991. Time domain reflectrometry measurements of water content and electrical conductivity of layered soil columns. Soil Sci. Soc. Am. J. 55: 938-943.
- Or, D., 1995. Stochastic analysis of soil water monitoring for drip irrigation management in heterogeneous soils. Soil Sci. Soc. Am. J. 59: 1222-1233.
References
Ahuja, L.R., K.E. Johnsen, and G.C. Heathman, 1995. Macropore transport of a surface- applied bromide tracer: model evaluation and refinement. Soil Sci. Soc. Am. J. 59: 1234- 1241.
Friendman, S. P., 1997. Statistical mixing model for the apparent dieletric constant of unsaturated porous media. Soil Sci. Soc. Am. J. 61: 742-745.
Gardner, W., 1986. Water content. In A. Klute (ed.): Methods of Soil Analysis. Part 1: Physical and Mineralogical Methods. Second edition. ASA, Inc., SSSA, Inc., Madison, Wisconsin, USA. pp. 493 – 544.
Hermawan, B., 2001a. Korelasi antara berat volume dan impedensi listrik tanah: I. Percobaan Laboratorium. JIPI.3(1) : 1–8.
Hermawan, B., 2001b. Korelasi antara berat volume dan impedensi listrik tanah: II. Percobaan Lapangan. JIPI.3(1) : 9–15.
Hermawan, B., 2004. Penetapan kadar air tanah melalui pengukuran sifat dielektrik pada berbagai tingkat kepadatan. JIPI. 6(2) : 66 – 74.
Hermawan, B., Z. Bahrum, dan Hasanudin, 2000. Pendugaan nilai kepadatan tanah melalui pengukuran sifat dielektrik: suatu teknik analisis tanah baru berwawasan lingkungan. Laporan Penelitian Hibah Bersaing VIII. Lembaga Penelitian Universitas Bengkulu.
Kittel, C., 1991. Introduction to Solid State Physics. John Wiley & Sons, Singapore.
Nadler, A., S. Dasberg, dan I. Lapid, 1991. Time domain reflectrometry measurements of water content and electrical conductivity of layered soil columns. Soil Sci. Soc. Am. J. 55: 938-943.
Or, D., 1995. Stochastic analysis of soil water monitoring for drip irrigation management in heterogeneous soils. Soil Sci. Soc. Am. J. 59: 1222-1233.