| |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Woods, Micah S.;
Ketterings, Q. M.;
Rossi, F. S. |
Author Affiliation: | Cornell University, Ithica, New York |
Title: | Estimation of cation exchange capacity in sand rootzones |
Meeting Info.: | Seattle, WA: October 31-November4, 2004 |
Source: | 2004 Annual Meeting Abstracts [ASA/CSSA/SSSA/CSSS]. 2004, p. [1]. |
Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
# of Pages: | 1 |
Keywords: | TIC Keywords: Cation exchange capacity; Sand-based root zones; Soil testing; Analytical methods; Calcareous soils
|
Abstract/Contents: | "Soil cation exchange capacity (CEC) can be measured using the time-consuming BaCl2 compulsive exchange method (CECCE). However, most commercial laboratories estimate the CEC through summation of the non-acid cations and exchangeable acidity determined by an agronomic soil test (CECSUM). Our objective was to evaluate the accuracy of such estimates for calcareous and non-calcareous sand rootzones. Twenty sands were analyzed for CECCE; for each sand CECSUM was calculated as the sum of non-acid cations extracted by Morgan, Mehlich 3, 1 N NH4OAc, 1:5 H2O, and 0.01 M SrCl2. Morgan, Mehlich 3, and 1 N NH4OAc extractions dissolved carbonate minerals and consequently CECSUM based on these methods greatly overestimated CECCE in calcareous sands. The CECSUM of non-calcareous sands based on Morgan, Mehlich 3, and 1 N NH4OAc extractions was also greater than CECCE. The CECSUM based on the 1:5 H2O extraction method underestimated CECCE. The CECSUM calculated from the 0.01 M SrCl2 extractable cations was highly correlated with CECCE (r2=0.90) for both calcareous and non-calcareous sands included in the study. More accurate estimates were obtained by subtracting water-soluble non-acid cations from 0.01 M SrCl2 extractable non-acid cations (r2=0.93). We conclude that for sand rootzones, the 0.01 M SrCl2 extraction can be used to rapidly obtain accurate estimates of CECCE." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Woods, M. S., Q. M. Ketterings, and F. S. Rossi. 2004. Estimation of cation exchange capacity in sand rootzones. Annu. Meet. Abstr. p. [1]. |
| Fastlink to access this record outside TGIF: https://tic.lib.msu.edu/tgif/flink?recno=100997 |
| If there are problems with this record, send us feedback about record 100997. |
| Choices for finding the above item: |
| TIC Vertical - CD-ROM |
| Find from within TIC: Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |