By Donald L. Sparks
Below new editorial course, Advances in Agronomy either maintains its lengthy culture and expands to incorporate leading edge tools and applied sciences. major overseas scientists disguise subject matters in plant and soil sciences, biotechnology, terrestrial ecosystems, and environmental concerns.The moment quantity lower than new editorial course, Advances in Agronomy, quantity forty seven specializes in environmental caliber and biotechnology. 4 articles on soil technology disguise acid deposition, chemical delivery, and floor complexation. articles on crop technological know-how survey kind fingerprinting and corn evolution. This and comparable volumes might be of curiosity to agronomists and biotechnologists in academe, undefined, and govt. Key positive factors* Acidic deposition in forested soils* Modeling natural and inorganic chemical shipping in soils* floor complexation versions in soil chemical structures* Fingerprinting crop types* Evolution of corn
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Extra info for Advances in Agronomy, Vol. 47
Copyright 01986 Macmillan Magazines Ltd. 26 WAYNE P. ROBARGE AND DALE W. 2. , 1990). 2 is consistent with the cation exchange and aluminum-release buffering ranges in Table 11. Regardless of the exact mechanism controlling A1 solubility in forest soil horizons, Eqs. ( 5 ) and (7) can be combined to generate the curvilinear relationship between BS and pH shown in Fig. 3. Using the convention of Reuss and his co-workers (1990), the combined equation can be obtained by substituting the right-hand side of Eq.
A. , 1982; Swank, 1986; Agren and Bosatta, 1988). Nitrogen retention is high because most forest ecosystems have N as the element limiting 30 WAYNE P. ROBARGE AND DALE W. JOHNSON growth (Binkley and Richter, 1987; Johnson and Lindberg, 1989). Nitrate removal from soil solution, therefore, will occur during the growing season when the demand for N by the biological community exceeds N inputs by atmospheric deposition and release of N from mineralization of soil organic matter. Nitrogen saturation of an intact forest ecosystem occurs when the external and internal sources of N exceed demand (Agren and Bosatta, 1988).
1990). , 1983; Matzner, 1989). The rate of silicate weathering can have a significant influence on the chemical state of a forest ecosystem (Matzner, 1989), and will also affect the long-term resistance of an ecosystem to acidic inputs. An increase in the rate of weathering in response to an increase in the H+ concentration of the soil solution would act to buffer against changes in soil acidity, but the potential for loss of base cations would also increase. Such losses from the primary source of nutrient cations within an ecosystem would have a direct influence on the system's ability to recover after a cessation or reduction in acidic inputs.
Advances in Agronomy, Vol. 47 by Donald L. Sparks