1.Samavat, S., Tehrani, M. M., Bazargan, K., & Basirat, M. (2008). Instructions on how to check organic materials. Prepared in the research department of chemistry, soil fertility and plant nutrition. Soil &Water Research Institute. [In Persian]
2.Karimi, H. (1996). Agricultural plants. Tehran University Publication. 205 p. [In Persian]
3.Valinejad, M., & Vaseghi, S. )2020(. The importance and impact of soil organic matter in sustainable agriculture, the 10th national conference on sustainable environment, energy and natural resources. 1-11. [In Persian]
4.Mccarthy, P., Bloom, P. R., Clapp, C. E., & Malcolm, R. L. )2001(. In: Humic substances in soil and crop sciences: Selected readings. SSSA. Madison. 261 p.
5.Sarlaki, A., Sharif Pa Ghaleh, A., Kianmehr, M. H., & Shakiba, N. )2017(. Spectral, structural and chemical study of humic acids extracted from coals in Iranian mines. Iranian. Journal of Soil & Water Research, 48 (5), 1145-1158. [In Persian]
6.Sun, Q., Liu, J., Huo, L. C., Li, Y., Li, X., Xia, L., Zhou, Z., Zhang, M., & Li, B. )2020(. Humic acids derived from Leonardite to improve enzymatic activities and bioavailability of nutrients in a calcareous soil. International Journal of Agricultural and Biological Engineering, 13(3), 200-205.
7.Celik, H., Katkat A. V., Asık, B. B., & Turan, M. A. )2008(. Effects of soil applied humic substances to dry weight and mineral nutrients uptake of maize under calcareous soil conditions. The Journal of Agricultural Science, 54 (6), 605-614.
8.Arjumend, T., Abbasi, M. K., & Rafique, E. (2015). Effects of lignited-derived humic acid on some selected soil properties, growth and nutrient uptake of wheat (Triticum Aestivum L.) grown under greenhouse condition. Pakistan Journal of Bology, 47 (6), 2231-2238.
9.Bezuglova, O. S., Polienko, E. A., Gorovtsov, A. V., Lyhman, V. A., & Pavlov, P. D. (2017). The effect of humic substances on winter wheat yield and fertility of ordinary chernozem. Annals of Agrarian Science, 15(2), 239-242.
10.Dinçsoy, M., & Sönmez, F. (2019). The effect of potassium and humic acid applications on yield and nutrient contents of wheat (Triticum aestivum L. var. Delfii) with same soil properties. Journal of Plant Nutrition, 42(20), 2757-2772.
11.Khaled, H., & Fawy, H. A. (2011). Effect of Different Levels of Humic Acids on the Nutrient Content, plant Growth, and Soil Properties under Conditions of Salinity. Soil Water Research, 6(1), 21-29.
12.Rosa, S. D., Silva, C. A., & Maluf, H. J. G. M. (2018). Humic acid-phosphate fertilizer interaction and extractable phosphorus in soils of contrasting texture. Revista Ci^encia Agron^omic34a, 49 (1), 32-42.
13.Sharifi, M., Khattak, R. A., & Sarir, M. S. (2002). Effect of different levels of ligniticcoal derived humic acid on growth of maize plants. Plant Analysis, 33, 3567-3580.
14.Izhar Shafi, M., Adnan, M., Fahad, Sh., Wahid, F., Khan, A., Yue, Z., Danish, S., Zafar-ul-Hye, S., Brtnicky, M., & Datta, R. (2020). Application of Single Superphosphate with Humic Acid Improves the Growth, Yield and Phosphorus Uptake of Wheat (Triticum aestivum L.) in Calcareous Soil. Agronomy, 10 (9), 1224-1236.
15.Roades, J. D. (1996). Salinity: electrical conductivity and total dissolved solids. Method of soil analysis, parss: chemical methods. Madison. Wisconsin, USA, 417-436.
16.Chapman, H. D. (1965). Cation-exchange capacity Methods of Soil analysis Part 2. Chemical and microbiological properties, 891-901.
17.Anderson, G. (2009). Seaweed extract shows improved fruit quality at mcLaren valevineyard trial. Australian and New Zealand Grapegrower & Winemaker, 548, 17-22.
18.Rowell, D. L. (1994). Soil science: methods and applications. Harlow: Longman Group. 350 p.
19.Qi, B. C., Aldrich, C., & Lorenzen, L. (2004). Effect of ultrasonication on the humic acids extracted from lignocellulose substrate decomposed by anaerobic digestion. Chemical Engineering Journal, 98, 153-163.
20.Swift, R. S. (1996). Organic matter characterization. In Methods of Soil Analysis, part 3: Chemical methods, ed. D. L. Sparks, Madison, Wisc. SSSA. 1011-1069.
21.Jones, D. L. (2001). Simple method to enable the high resolution determination of total free amino acids in soil solutions and soil extracts. Soil Biology Biochemistry, 34, 1893-1902.
22.Olsen, S. R. V., Cole, F. S., Watanabe, L., & Dean, A. (1954). Estimations of available phosphorus in soils by extractions with sodium bicarbonate. Washington, DC: United States Department of Agriculture. 41-939.
23.Helmke, P. D., Sparks, A., Page, R., Loppert, P., Soltanpour, M., & Tabatabai, E. (1996). Lithium, sodium, potassium, rubidium and cesium. Method of soil analysis part 3- chemical methods. 74-551.
25.Malakouti, M. J. (2004). Optimum recommendation of fertilizer consumption for agricultural products in Iran. Mobaleghan Publication. 348 p. [In Persian]
26.Bidegain, R. A., Kaemmerer, M., Guiresse, M., Hafidi, M., Rey, F., Morard, P., & Revel, J. C. (2000). Effects of humic substances from composted or chemically decomposed poplar sawdust on mineral nutrition of ryegrass. Journal of Agricultural Science, 134, 259-267.
27.Aydin, A. K. C., & Turan, M. (2012) Humic acid application alleviate salinity stress of bean (Phaseolus vulgaris L.) plants decreasing membrane leakage. African Journal of Agricultural Research, 7, 1073-1086.
28.Mora, V., Bacaicoa, E., Zamarreño, A. M., Aguirre, E., Garnica, M., & Fuentes, M. (2010). Action of humic acid on promotion of cucumber shoot growth involves nitrate-related changes associated with the root-to-shoot distribution of cytokinins, polyamines and mineral nutrients. Journal of Plant Physiology, 167, 633-642.
29.Valdrighia, M., Peraa, A., Scatenab, S., Agnoluccib, M., & Vallinia, G. (2013). Effects of Humic Acids Extracted from Mined Lignite or Composted Vegetable Residues on Plant Growth and Soil microbial Populations, a Soil Microbiology Center, National Research Council (CNR) by Institute of Agricultural Microbiology, University of Pisa Published online.
30.Ounia, Y., Ghnayaa, T., Montemurrob, F., Abdellya, C. H., & Lakhdara, A. (2014). The role of humic substances in mitigating the harmful effects of soil salinity and improve plant productivity. International Journal of Plant Production, 8 (3), 1735-6814.
31.Tamer, N., Bas¸alma, D., Turkmen, C., & Namli, A. (2016). Effect of organic soil conditioners on soil properties and yield and yield components of sunflower (Helianthus annuus L.). Journal of Soil Science & Plant Nutrition, 4 (1), 11-21.
32.Li, Y., Fang, F., Wei, J., Wu, X., Cui, R., Li, G., Zheng, F., & Tan, D. (2019). Humic Acid Fertilizer Improved Soil Properties and Soil Microbial Diversity of Continuous Cropping Peanut, A Three-Year Experiment. 657, 2326-2397.
33.Fu, Z., Wu, F. Song, K., Lin, Y., Bai, Y., Zhu, Y., & Giesy, J. P. (2013). Competitive interaction between soils derived humic acid and phosphate on goethite. Applied Geochemistry, 36 (1), 125-31.
34.Mindari, W., Edi Sasongko, P., Kusuma, Z., Syekhfani, & Aini, N. (2018). Efficiency of various sources and doses of humic acid on physical and chemical properties of saline soil and growth and yield of rice. The 9th International Conference on Global Resource Conservation (ICGRC) and AJI from Ritsumeikan University AIP Conf.
35.Wang, X. J., Wang, Z. Q., & Li, S. G. (1995). The effect of humic acids on the availability of phosphorus fertilizers in alkaline soils. Soil Use Management, 11, 99-102.
36.Mackowiak, C. L., Grossl, P. R., & Bugbee, B. G. (2001). Beneficial effects of humic acid on micronutrient availability to wheat. Soil. Science Society of America Journal, 65, 1744-1750.
37.Malcolm, R. E., & Vaghuan, D. V. (1979). Humic substances and phosphatase activies in plant tissues. Soil Biology and Biochemistry, 11, 253-259.
38.Wang, D., Lin, Z., Wang, T., Yao, Z., Qin, M., Zheng, S., & Lu, W. (2016). Where does the toxicity of metal oxide nanoparticles come from: The nanoparticles, the ions, or a combination of both. Journal of Hazard Materials, 308, 328-334.
39.Yang, C. M., Ming, C. W., Lu, Y. F., Chang, I. F., & Chou, C. H. (2016). Humic substances affect the activity of chlorophylls. Journal of Chemical Ecology, 30 (5), 1057-1058.
40.Gerke, J. (2018). Concepts and Misconceptions of Humic Substances as the Stable Part of Soil Organic Matter, Ausbau 5, 18258 Rukieten, Germany, 49, 325-384.
41.Halpern, M., Bar-Tal, A., Ofek, M., Minz, D., Muller, T., & Yermiyahu, U. (2015). The use of biostimulants for enhancing nutrient uptake, In: D.L. Sparks, (Ed.). Advances in Agronomy, 129, 141-174.
42.Olk, D. C., & Cassman, K. G. (1995). Reduction of potassium fixation by two humic acid fractions in vermiculitic soils. Soil Science Society of America Journal, 59, 1250-1258.
43.Chenghua, L., Lei, L., & Liyu, D. (2005). Effect of humic acids on fixation and release of potassium in cultivated brown soil. Acta Pedologica Sinica, 42, 472-477.
44.Evangelou, V. P., & Blevins, R. L. (1988). Effect of longterm tillage systems and nitrogen addition on potassium quantity-intensity relations. Soil Science Society of America Journal, 52, 1047-1054.
45.Mortland, M. M. (1986). Mechnisms of adsorption of nonhumic organic species by clays. P 59-76. In P. M. Huang and M. Schinitzer(ed.). Interaction of soil minerals with natural organics and microbes. SSSA Spec. Publ. 17. SSSA. Madison, WI.
46.Christoph, E. (2003). Report on the consultancy stays on the occasion of the UNDP-RDA program developing
and promoting support system and international cooperation on environment-friendly agriculture, Korea. 33, 517-524.
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