Agroecosystems are domesticated ecosystems intermediate between natural ecosystems and fabricated ecosystems, and occupy nearly one-third of the land areas of the earth. Chemical perturbations as a result of human activity are particularly likely in agroecosystems because of the intensity of that activity, which include nutrient inputs intended to supplement native nutrient pools and to support greater biomass production and removal. At a long-term fertility trial in South-Central Wisconsin, USA, significant increases in exchangeable acidity were accompanied by decreases in cation exchange capacity (CEC), base saturation, and exchangeable Ca2+ and Mg2+ with application of ammoniacal N fertilizer. Plant analysis shows that a considerable portion of the alkalinity generated by assimilation of N (and to a lesser extent by S) is sequestered in the above-ground plant parts as organic anions and is not returned to the soil if harvested. Elemental analysis of Ca-saturated soil clays indicates an loss of 16% of the CEC of the soil clay and minor increases in Fe and Al. The reversibility of these changes due to prolonged acidification is doubtful if the changes are due to soil weathering.
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Aber J D, Nadelhoffer K J, Steudler P and Melillo J M 1989 Nitrogen saturation in Northern forest ecosystems. BioSci. 39, 378–386.
Barak P and Chen Y 1992 Equivalent radii of humicmacromolecules from acid-base titration. Soil Sci. 152, 184–195.
Barak P, Sherman L A and Jobe B O 1996 Comments on “Design and construction of a personal-computer-based automatic titrator”. Soil Sci. Soc. Am. J. 60, 630.
Barnhisel R I and Bertsch P M 1989 Chlorites and hydroxyinterlayered vermiculite and smectites. In Minerals in Soil Environments, 2nd ed. Eds. J B Dixon and S B Weed. pp 729–788. Soil Sci. Soc. Am., Madison, WI.
Blevins R L, Thomas G W and Cornelius P L 1977 Influence of notillage and nitrogen fertilization on certain soil properties after 5 years of continuous corn. Agron. J. 69, 383–386.
Bouman O T, Curtin D, Campbell C A, Biederbeck V O and Ukrainetz H 1995 Soil acidification from long-term use of anhydrous ammonia and urea. Soil Sci. Soc. Am. J. 59, 1488–1494.
Brimhall G H, Lewis C J, Ford C, Bratt J, Taylor G, Warin O 1991 Quantitative geochemical approach to pedogenesis: importance of parent material reduction, volumetric expansion, and eolian influx in laterization. Geoderma 51, 51–91.
Cox G W and Atkins M D 1979 Agricultural ecology. W H Freeman, San Francisco.
Dijkshoorn W and van Wijk A L 1967 The sulphur requirement of plants as evidenced by the sulphur–nitrogen ratio in the organic matter. A review of the published data. Plant Soil 26, 129–157.
Dise N B and Wright R F 1995 Nitrogen leaching from European forests in relation to nitrogen deposition. For. Ecol. Manag. 71, 153–161.
Driscoll C T and van Dreason R 1992 Seasonal and long-term temporal patterns in the chemistry of Adirondack lakes. Water Air Soil Pollut. 67, 319–344.
Edwards A P and Bremner J M 1965 Dispersion of mineral colloids in soils using cation exchange resins. Nature (London) 205, 208–209.
Helling C S, Chesters G and Corey R B 1964 Contribution of organic matter and clay to soil cation-exchange capacity as affected by the pH of the saturating solution. Soil Sci. Soc. Am. Proc. 28, 517–520.
Laird D A, Barak P, Nater E A and Dowdy R H 1991a Chemistry of smectitic and illitic phases in interlayered soil smectite. Soil Sci. Soc. Am. J. 55, 1499–1504.
Laird D A, Dowdy R H and Munter R C 1991b Suspension nebulization analysis of clays by inductively coupled plasma-atomic emission spectroscopy. Soil Sci. Soc. Am. J. 55, 274–278.
Liu Y 1995 Fixation and release of NH4 and K in long-term fertility plots. MSc. thesis, Iowa St. Univ. Ames, IA.
Liu Y, Laird D A and Barak P 1997 Dynamics of fixed and exchangeable NH4 and K in soils under long-term fertility management. Soil Sci. Soc. Am. J. 61, 310–314.
McBride M B 1989 Surface chemistry of soil minerals. In Minerals in Soil Environments, 2nd ed. Eds. J B Dixon and S B Weed. pp 35–88. Soil Sci. Soc. Am., Madison, WI.
Meister R T (Ed.) 1995 Farm chemicals handbook '95, Vol. 81. Meister Publ. Co., Willowby, OH.
National Atmospheric Deposition Program1993 NADP/NTNAnnual Data Summary. Precipitation Chemistry in the United States. 1992. National Resource Ecology Laboratory, Colorado State Univ., Fort Collins, CO. 480 pp.
Odum E P 1984 Properties of agroecosystems. In Agricultural Ecosystems: Unifying Concepts. Ed. R Lowrance, B R Stinner and G J House. pp 5–11. J Wiley, New York.
Peterson L A and Krueger A R 1980 Variation in content of available P and K (Bray I) in soil samples from a cropped N, P, and K fertility experiment over 8 years. Commun. Soil Sci. Plant Anal. 11, 993–1004.
Pierre W H and Banwart W L 1973 Excess-base and excessbase/ nitrogen ratio of various crop species and parts of plants. Agron. J. 65, 91–96.
Poss R, Smith C J, Dunin F X and Angus J F 1995 Rate of soil acidification under wheat in a semi-arid environment. Plant Soil 177, 85–100.
Schwab A P, Ransom M D and Owensby C E 1989 Exchange properties of an argiustoll: effects of long-term ammonium nitrate fertilization. Soil Sci. Soc. Am. J. 53, 1412–1417.
Shainberg I, Low P F and Kafkafi U 1974 Electrochemistry of sodium-montmorillonite suspensions: I. Chemical stability of montmorillonite. Soil Sci. Soc. Am. Proc. 38, 751–756.
Sposito G 1989 The Chemistry of Soils. Oxford Univ. Press, New York.
Steel R G D and Torrie J H 1980 Principles and Procedures of Statistics: A Biometrical Approach. McGraw-Hill Inc., New York.
Stoddard J 1994 Long-term changes in watershed retention of nitrogen: Its causes and consequences. In Environmental Chemistry of Lakes and Reservoirs. Ed. L A Baker. pp 223–284. Am. Chem. Soc.
Sumner M E and Miller W P 1996 Cation exchange capacity and exchange coefficients. In Methods of Soil Analysis. Part 3: Chemical Methods. Ed. J M Bigham. pp 1201–1229. Soil Sci. Soc. Am. Inc., Madison.
Uehara G and Gillman G 1981 The mineralogy, chemistry, and physics of tropical soils with variable charge clays. Westview Press, Boulder, CO.
Van Breemen N, Mulder J and Driscoll C T 1983 Acidification and alkalinization of soils. Plant Soil 75, 283–308.
Van Beusichem M L, Kirkby E A and Baas R 1988 Influence of nitrate and ammonium nutrition on the uptake, assimilation, and distribution of nutrients in Ricinus communis. Plant Physiol. 86, 914–921.
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Barak, P., Jobe, B.O., Krueger, A.R. et al. Effects of long-term soil acidification due to nitrogen fertilizer inputs in Wisconsin. Plant and Soil 197, 61–69 (1997). https://doi.org/10.1023/A:1004297607070
- cation exchange capacity
- exchangeable acidity
- N fertilizers
- organic anions