African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6861

Full Length Research Paper

Use of nutrient stock:balance (NSB) ratio for assessment of sustainability of agricultural system

Umeh, S. I.
  • Umeh, S. I.
  • Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria.
  • Google Scholar
Onyeonagu, C. C.
  • Onyeonagu, C. C.
  • Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria.
  • Google Scholar


  •  Accepted: 15 October 2013
  •  Published: 27 February 2014

References

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Howeler RH (2001). Nutrient inputs and losses in cassava-based Cropping System – Example from Vietnam and Thailand. International workshop on Nutrient Balance for sustainable Agricultural Production and Natural Resource management in Southeast Asia, Bangkok, Thailand, 20-22 February, 2001.
 
Ikeorgu IEG, Iloka AW (1994). On-farm evaluation of the effect of three contrasting maize varieties on productivity of Cassava/Maize intercrops in S.E. Nigeria. Proc. 5th symposium ASTRC-AB, pp. 243-246.
 
Leihner DE (1998). Agronomic implication of cassava-legume intercropping systems. In: Weber EJ, Nastle, B, Cambell M (eds). Proceedings of an International Workshop on Intercropping with Cassava, IDRC, Ottawa, Canada IDRC 142:103-112.
 
Ngo TD Inger L, Nguyen TM (2005). Intercropping Cassava (Manihot esculenta, Crantz) with Flemingia (Flemingia Macrophylla); effect on biomass yield and soil fertility. Livestock Res. Rural Develop. 17(1).
 
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Obi IU (1996). Introduction to factorial Experiment for Agriculture, Biological and Social Science Research. EOSC Ltd. Enugu. P. 45.
 
Obi IU (2002). Statistical Methods of Detecting Differences between Treatment Means and Research Methodology Issues in Laboratory and Field Experiments. AP Express Publishers Limited Nsukka – Nigeria. P. 117.
 
Smaling EMA, Fresco LO, De J (1996). Classifying, monitoring and improving soil nutrient stocks and flows in African Agriculture. Ambio 25:429-496.
 
Tijani EH, Akinnifesi FK (1996). On Farm evaluation of Soybean and Cassava intercrop in Southwest Nigeria. Afr. Crop Sci. J. 4:151-157.
 
Umeh SI, Mbah BN (2010a). Soybean contribution to nutrient balance in a cassava (Manihot esculenta Crantz) based cropping system. Agro-Science 9(3):147-153.
 
Umeh SI, Mbah BN (2010b). Intercrop performance of different varieties of soybean (Glycine max. (L) Merril) based cropping system within the derived savannah zone. Afr. J. Biotechnol. 9(50):8636-8642.
 
Unkovick MJ, Pate JS (2000). An appraisal of resent field measurement of symbiotic N fixation by legumes. Field Crop Res. 65(2-3):211-228.
http://dx.doi.org/10.1016/S0378-4290(99)00088-X