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DOI: | 10.1080/09064710127617 |
Web URL(s): | http://www.tandfonline.com/doi/pdf/10.1080/09064710127617 Last checked: 06/12/2014 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Report |
Author(s): | Øgaard, Anne Falk;
Krogstad, Tore;
Løes, Anne-Kristin |
Author Affiliation: | Øgaard and Krogstad: Department of Soil and Water Sciences, Agricultural University of Norway, Ås; Løes: Norwegian Centre for Ecological Agriculture, Tingvoll, Norway |
Title: | Potassium uptake by grass from a clay and a silt in relation to soil tests |
Source: | Acta Agriculturae Scandinavica: Section B, Soil and Plant Science. Vol. 51, No. 3, 2001, p. 97-105. |
Publishing Information: | [London, United Kingdom]: Taylor & Francis |
# of Pages: | 9 |
Related Web URL: | http://www.tandfonline.com/doi/abs/10.1080/09064710127617#.U5nV7Ci-2f8 Last checked: 06/12/2014 Notes: Abstract only |
Keywords: | TIC Keywords: Clay soils; Comparisons; Potassium uptake; Silty soils; Soil testing
|
Abstract/Contents: | "In a pot experiment with five harvests of ryegrass the potassium (K) uptake from soil was studied in a clay and a silt soil, with (K1) and without (K0) K fertilizer. Ammonium acetate lactate-extractable K (K-AL) was rapidly depleted, and in K0 the K-AL level stabilized at 30 and 100 mg K kg-1 in the silt and clay soil, respectively. Corrected for different ''minimum'' values, the K-AL value predicted the K uptake by ryegrass from AL extractable K very well. In the silt soil the K release from reserve K (total K release from soil minus K release from K-AL) was small, whereas in the clay soil there was a substantial release from reserve K. Part of the reserve K in the clay soil was easily releasable and contributed to luxury consumption of K in the first crop. Acid-soluble K (K-HNO3 minus K-AL) was a good parameter by which to assess the ability of the soil to supply ryegrass with reserve K. The results were compared with the results of the field experiments from which the soils were collected. The difference in K release between silt and clay soil was larger in the pot than in the field experiments, but without K fertilization the K-AL values levelled off at the same values in field and pot experiments." |
Language: | English |
References: | 23 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Øgaard, A. F., T. Krogstad, and A.-K. Løes. 2001. Potassium uptake by grass from a clay and a silt in relation to soil tests. Acta Agriculturae Scandinavica: Section B, Soil and Plant Science. 51(3):p. 97-105. |
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| DOI: 10.1080/09064710127617 |
| Web URL(s): http://www.tandfonline.com/doi/pdf/10.1080/09064710127617 Last checked: 06/12/2014 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b4897625 MSU catalog number: b2483019 |
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