Journal of
Soil Science and Environmental Management

  • Abbreviation: J. Soil Sci. Environ. Manage.
  • Language: English
  • ISSN: 2141-2391
  • DOI: 10.5897/JSSEM
  • Start Year: 2010
  • Published Articles: 274

Full Length Research Paper

Applicability of the Mehlich-3 method for the site-specific soil nutrient management in Northern Mozambique

Monrawee Fukuda
  • Monrawee Fukuda
  • Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan.
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Satoshi Nakamura
  • Satoshi Nakamura
  • Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan.
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Hisashi Nasukawa
  • Hisashi Nasukawa
  • NTC International Co., Ltd., 1-32-2 Honcho, Nakano, Tokyo, 164-8721, Japan.
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Kazuhiro Naruo
  • Kazuhiro Naruo
  • NTC International Co., Ltd., 1-32-2 Honcho, Nakano, Tokyo, 164-8721, Japan.
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Momade M. Ibraimo
  • Momade M. Ibraimo
  • Instituto de Investigação Agrária de Moçambique (IIAM), Av. Das FPLM, km 7 via Corrane, CP: 622, Nampula, Mozambique.
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Keiichiro Kobayashi
  • Keiichiro Kobayashi
  • NTC International Co., Ltd., 1-32-2 Honcho, Nakano, Tokyo, 164-8721, Japan.
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Tetsuji Oya
  • Tetsuji Oya
  • Japan International Research Center for Agricultural Sciences (JIRCAS), 1-1 Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan.
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  •  Received: 19 June 2018
  •  Accepted: 15 August 2018
  •  Published: 30 September 2018

Abstract

Mehlich 3 (M-3) is a multi-nutrient extractant which provides a rapid and cost-effective soil test for various soils. This study investigated the applicability of M-3 for cation and micronutrient determination under the specific soil fertilization and crop rotation given in northern Mozambique. Cations and micronutrients extracted with M-3 were compared with the classical methods; neutral ammonium acetate (NH4OAc) for calcium (Ca), potassium (K), magnesium (Mg), and sodium (Na); diethylene triamine penta-acetic acid (DTPA) for copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn); and Bray I for phosphorus (P). Results indicated that M-3 was useful for Ca, K, Mg, P and Zn determination. Various types of soil fertilization or crop rotations did not alter the accuracy and precision of cation determination using M-3 and NH4OAc. Addition of organic and chemical fertilizers was thought to adversely affect the quantity of M-3 and DTPA extractable micronutrients and their correlations. However, levels of M-3 micronutrients in soils were well above those considered to be critical levels as same as that of DTPA. This suggested that M-3 was an acceptable procedure for determining cations and micronutrients in the routine analysis and could be advantageous for soil nutrient management in the specific conditions given.

Key words: Bray I, crop rotation, diethylene triamine penta-acetic acid (DTPA), Mehlich 3, Mozambique, Nacala, neutral ammonium acetate (NH4OAc)