Al-Busaidi, A., Cookson, P. & Yamamoto, T. 2005. Methods of soil pH determination in calcareous soils: use of electrolyte and suspension effect. Australian Journal of Soil Research 43: 541- 545.
Augustin, J., Beck, C.B., Kalbfleish, G., Kagel, L.C. & Matthews, R.H. 1981. Variation in the vitamin and mineral content of raw and cooked commercial Phaseolus vulgaris classes. Journal of Food Science 46: 1701-1706.
Blain, S., Qu´eguiner, B., Armand, L., Belviso, S., Bombled, B., Bopp, L., Bowie, A., Brunet, C., Brussaard, C., Carlotti, F., Christaki, U., Corbi`ere, A., Durand, I., Ebersbach, F., Fuda, J.-L., Garcia, N., Gerringa, L., Griffiths, B., Guigue, C., Guillerm, C., Jaquet, S., Jeandel, C., Laan, P., Lef`evre, D., Monaco, C. L., Malits, A., Mosseri, J., Obernosterer, I., Park, Y.-H., Picheral, M., Pondaven, P., Remenyi, T., Sandroni, V., Sarthou, G., Savoye, N., Scouarnec, L., Souhaut, M., Thuiller, D., Timmermans, K., Trull, T., Uitz, J., van Beel, P., Veldhuis, M., Vincent, D., Viollier, E., Vong, L. & Wagener, T. 2007. Effect of natural iron fertilization on carbon sequestration on the Southern Ocean. Nature 446: 1070-1074.
Bohn, H.L., McNeal, B.L. & Connor, G.A. 1979. Soil chemistry. John Wiley & Sons, New York.
Bukvac, M. & Wittwer, S. 1957. Absorption and mobility of foliar applied nutrients. Plant Physiology 32: 428- 35.
Bradford, M.M. 1976. A rapid and sensitive method for the quantitation of microgram quantities utilizing the principle of protein-dye binding. Analytical Biochemistry 72: 248-254.
Carter, M.R., Angers, D.A. & Kunelius, H.T. 1998. Soil structural and stability, and organic matter under cool season perennial grasses. Soil Science Society of America Journal 58: 1194-1199.
Celmeli, T., Sari, H., Canci, H., Sari, D., Adak, A., Eker, T. & Toker, C. 2018. The nutritional content of common bean (Phaseolus vulgaris L.) landraces in comparison to modern varieties. Agronomy Journal 8: 166.
Chakraborty, K. & Mistri, B. 2015. Soil fertility and its impact on agricultural productivity: a study in sapar mouza, burdwan-I C.D. Block, West Bengal. International Journal of Humanities & Social Science Studies 2: 196-206.
Cifuentes, Z., Custardoy, L., Fuente, J., Marquina, C., Lbarra, M., Rubiales, D. & Peres-de-Luque, A. 2010. Absorption and translocation to the aerial part of magnetic carbon-coated nanoparticles through the root of different crop plants. Journal of Nanibiotechnology 8: 26.
Dat, J., Vandenabeele, S., Vranová, E., Van Montagu, M., Inzé, D. & Van Breusegem, F. 2000. Dual action of active oxygen species during plant stress responses. Cellular and Molecular Life Science 57: 779-795.
Hoagland, D.R. & Arnon, D. 1950. The water culture method for growing plants without soil. COA, California, 500 pp.
Kaya, C., Kirnak, H. & Saltali, K. 2002. Supplementary calcium enhances plant growth and fruit yield in strawberry cultivars grown at high (NaCl) salinity. Scientia Holticulturae 93: 65-74.
Kennedy, M.J., Chadwick, O.A., Vitousek, P.M., Derry, L.A. & Hendricks, D.M. 1998. Replacement of weathering with atmospheric sources of base cations during ecosystem development, Hawaiian Island. Geology 26: 1015-8.
Klibanov, A.M., Tu, T.M. & Scott, K.P. 1983. Peroxidase catalyzed removal of phenols from coalconversion wastewaters. Science 221: 259.
Kuznetsov, V.V. & Shevyakova, N.I. 1977. Stress responses of tobacco cells to high temperature and salinity. proline accumulation and phosphohydration of polypeptids. Physiologia Plantarum 100: 320-326.
Laegreid, M., Böckman, O.C. & Kaarstad, O. 1999. Agriculture, fertilizers and the environment. CABI Publishing in association with Norsk Hydro ASA, 150 pp.
Maehly, A.C. & Chance, B. 1954. The assay of catalases and peroxidases. Methods of Biochemical Analysis 1: 357-424.
Magnin, A., Villalba, R., Torres, C.D., Stecconi, M., Passo, A., Sosa, C.M. & Puntieri, J.G. 2016. Effect of volcanic ash deposition on length and radial growths of a deciduous montane tree (Nothofagus pumilio). Austral Ecology 42: 103-112.
Maksimović, I., Putnik-Delić, M., Gani, I., Marić, J. & Ilin, Z. 2010. Growth, ioncomposition and stomatal conductance of peas exposed to salinity. Central European Journal of Biology 5: 682- 691.
Martin, R.S., Watt, S.F.L., Pyle, D.M., Mathet, T.A., Matthews, N.E., Georg, R.B., Day, J.A., Fairhead, T., Witt, M.L.I. & Quayle, B.M. 2009. Environmental effects of ash in argentina from the 2008 Chaitén volcanic eruption. Journal of Volcanology and Geothermal Research 184: 462-472.
McCauley, A., Jones, C. & Olson kutz, K. 2017. Soil pH and organic matter. Journal of Geoscience and Environment Protection 6: 194-210.
Nakagawa, M. & Ohba, T. 2003. Minerals in volcanic ash 1: primary minerals and volcanic glasses. Enviromental Research 6: 41-51.
Nanzyo, M. 2007. Introduction studies on volcanic ash soils in Japan and international collaboration. Journal of Integrated Field Science 4: 71-77.
Otsuka, H., Briones, A.A., Daquiado, N.P. & Evangelio, F.A. 1988. Characteristics and genesis of volcanic ash soils in the Philippines. Technical Bulletin. Tropical Agriculture Research Center: Japan 24: 1-127.
Parfitt, A.E. & Wilson, L. 2008. Fundamentals of physical volcanology. Oxford, UK, Blackwell Publishing, 230 pp.
Ping, C.L., Shoji, S., Ito, T., Takahashi, T. & Moore, J.P. 1989. Characteristics and classification of volcanic ash derived soils in Alaska. Soil Science 148: 8-28. Rout, R. & Sahoo, S. 2015. Role of iron in plant growth and metabolism. Reviews in Agricultural Science 3: 1-24.
Savci, S. 2012. An agriculture pollutant: chemical fertilizer. International Journal of Environmental Science and Development 3: 77-80.
Sultana, S., Mohammad Naser, H., Quddus, A. & Shill, N. 2018. Effect of foliar application of iron and zinc on nutrient uptake and grain yield of wheat under different irrigation regimes. Bangladesh Journal of Agricultural Research 43: 395.
Symkatz, K.W. 1974. Differential thermal analysis, application and results in mineralogy. Springer Verlag, Berlin, pp: 81-90.