References

References
    1. Piper, C. S. 1942. Soil and plant analysis, Inter science Publishers, Inc., New York
    2. Garn A. Wallace. 2010. Plant tissue analysis complements soil TEST. www.wlabs.com copyright
    3. www.servitechlabs.com/Portals/0/PlantSampling1.pdf
    4. www.bettersoils.com/planttestingart.pdf
    5. Illustrated Guide to Sampling for Plant Analysis.2009.Spectrum Analytic Inc
    6. http://www.avocadosource.com/books/TraynorJoe1980/IDEAS_PG_79-84.pdf

Last modified: Wednesday, 11 April 2012, 9:54 AM