African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Evaluation of some soil test methods in acid soils for available phosphorus for soybean of Imphal East District, Manipur (India)

Wangkhem Herojit Meetei
  • Wangkhem Herojit Meetei
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Herojit Singh Athokpam
  • Herojit Singh Athokpam
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Raj Kumar Kumarjit Singh
  • Raj Kumar Kumarjit Singh
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Linthoi Watham
  • Linthoi Watham
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Nandini Chongtham
  • Nandini Chongtham
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Konthoujam Nandini Devi
  • Konthoujam Nandini Devi
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Naorem Brajendra Singh
  • Naorem Brajendra Singh
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Khwairakpam Lenin Singh
  • Khwairakpam Lenin Singh
  • Central Agricultural University, Imphal-795004, Manipur, India.
  • Google Scholar
Naorem Janaki Singh
  • Naorem Janaki Singh
  • College of Post-Graduate Studies, CAU, Barapani, Meghalaya, India
  • Google Scholar


  •  Received: 11 December 2013
  •  Accepted: 09 February 2015
  •  Published: 19 February 2015

Abstract

Evaluation of nutrient status in soil is important for nutritional, environmental and economical aspects. Phosphorus is a very important nutrient for leguminous crops. In order to evaluate the phosphorus availability, six soil test methods were carried out for predicting response of soybean to phosphorus application on twenty surface soils (0 - 15 cm) of Imphal East District, Manipur were studied. The suitability of these extractants was in the descending order: Bray P1 > Mehlich P1 > Bray P2 > Troug P > Olsen P > Morgan P. Bray’s P1 extractable phosphorus showed the highest and positive correlations with phosphorus content (control), phosphorus uptake (control), Bray’s percent yield and uptake. Therefore, this extractant may be used as an index of available phosphorus for soybean (JS-335) grown on acid soils of Imphal East District, Manipur, the critical level being 13 ppm (mg kg-1). The critical limit of phosphorus concentration in plant at 40 days of planting was 0.22%.

 

Key words: Phosphorus, acid soils, Bray’s percent yield, soybean, critical limit.