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Potassium Management during the Rotation from Alfalfa to Corn
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Zeitschriftentitel: | Agronomy Journal |
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Personen und Körperschaften: | , , , , |
In: | Agronomy Journal, 103, 2011, 6, S. 1785-1793 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Wiley
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Schlagwörter: |
author_facet |
Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. |
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author |
Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. |
spellingShingle |
Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. Agronomy Journal Potassium Management during the Rotation from Alfalfa to Corn Agronomy and Crop Science |
author_sort |
yost, matt a. |
spelling |
Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2011.0183 <jats:p>High K fertilizer prices in recent years have made it imperative for growers to apply optimum K rates to alfalfa (<jats:italic>Medicago sativa</jats:italic> L.). Current university fertilizer guidelines in the Corn Belt do not change for the last production year, when alfalfa stand persistence is not a major concern. Furthermore, little is known about carryover of K applied to alfalfa on first‐year corn (<jats:italic>Zea mays</jats:italic> L.) grain and silage yields. In 2008 to 2010, on‐farm research was conducted on 10 fields with medium soil test potassium (STK) to determine response to K for alfalfa yield and quality in the last production year, and to estimate K carryover to first‐year corn. Alfalfa yield and relative feed value (RFV) and quality (RFQ) did not improve with K fertilization. Herbage K concentration and K uptake increased with K fertilization across sites, indicating that applied K was available during the season of application. When corn relied on carryover K alone, each 100 kg ha<jats:sup>−1</jats:sup> increase in the index of available K increased corn grain yield by 0.5 Mg ha<jats:sup>−1</jats:sup>, decreased stover yield by 0.4 Mg ha<jats:sup>−1</jats:sup>, and did not affect silage yields. Regardless of K rate applied to alfalfa, additional K applied to corn increased corn stover and silage yields by 10 and 8%, respectively. This suggests that carryover K was less available than K applied to corn. On medium STK soils going into the last year of alfalfa, applying fertilizer K to first‐year corn rather than alfalfa may enhance economic return.</jats:p> Potassium Management during the Rotation from Alfalfa to Corn Agronomy Journal |
doi_str_mv |
10.2134/agronj2011.0183 |
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title |
Potassium Management during the Rotation from Alfalfa to Corn |
title_unstemmed |
Potassium Management during the Rotation from Alfalfa to Corn |
title_full |
Potassium Management during the Rotation from Alfalfa to Corn |
title_fullStr |
Potassium Management during the Rotation from Alfalfa to Corn |
title_full_unstemmed |
Potassium Management during the Rotation from Alfalfa to Corn |
title_short |
Potassium Management during the Rotation from Alfalfa to Corn |
title_sort |
potassium management during the rotation from alfalfa to corn |
topic |
Agronomy and Crop Science |
url |
http://dx.doi.org/10.2134/agronj2011.0183 |
publishDate |
2011 |
physical |
1785-1793 |
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<jats:p>High K fertilizer prices in recent years have made it imperative for growers to apply optimum K rates to alfalfa (<jats:italic>Medicago sativa</jats:italic> L.). Current university fertilizer guidelines in the Corn Belt do not change for the last production year, when alfalfa stand persistence is not a major concern. Furthermore, little is known about carryover of K applied to alfalfa on first‐year corn (<jats:italic>Zea mays</jats:italic> L.) grain and silage yields. In 2008 to 2010, on‐farm research was conducted on 10 fields with medium soil test potassium (STK) to determine response to K for alfalfa yield and quality in the last production year, and to estimate K carryover to first‐year corn. Alfalfa yield and relative feed value (RFV) and quality (RFQ) did not improve with K fertilization. Herbage K concentration and K uptake increased with K fertilization across sites, indicating that applied K was available during the season of application. When corn relied on carryover K alone, each 100 kg ha<jats:sup>−1</jats:sup> increase in the index of available K increased corn grain yield by 0.5 Mg ha<jats:sup>−1</jats:sup>, decreased stover yield by 0.4 Mg ha<jats:sup>−1</jats:sup>, and did not affect silage yields. Regardless of K rate applied to alfalfa, additional K applied to corn increased corn stover and silage yields by 10 and 8%, respectively. This suggests that carryover K was less available than K applied to corn. On medium STK soils going into the last year of alfalfa, applying fertilizer K to first‐year corn rather than alfalfa may enhance economic return.</jats:p> |
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author | Yost, Matt A., Russelle, Michael P., Coulter, Jeffrey A., Sheaffer, Craig C., Kaiser, Daniel E. |
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description | <jats:p>High K fertilizer prices in recent years have made it imperative for growers to apply optimum K rates to alfalfa (<jats:italic>Medicago sativa</jats:italic> L.). Current university fertilizer guidelines in the Corn Belt do not change for the last production year, when alfalfa stand persistence is not a major concern. Furthermore, little is known about carryover of K applied to alfalfa on first‐year corn (<jats:italic>Zea mays</jats:italic> L.) grain and silage yields. In 2008 to 2010, on‐farm research was conducted on 10 fields with medium soil test potassium (STK) to determine response to K for alfalfa yield and quality in the last production year, and to estimate K carryover to first‐year corn. Alfalfa yield and relative feed value (RFV) and quality (RFQ) did not improve with K fertilization. Herbage K concentration and K uptake increased with K fertilization across sites, indicating that applied K was available during the season of application. When corn relied on carryover K alone, each 100 kg ha<jats:sup>−1</jats:sup> increase in the index of available K increased corn grain yield by 0.5 Mg ha<jats:sup>−1</jats:sup>, decreased stover yield by 0.4 Mg ha<jats:sup>−1</jats:sup>, and did not affect silage yields. Regardless of K rate applied to alfalfa, additional K applied to corn increased corn stover and silage yields by 10 and 8%, respectively. This suggests that carryover K was less available than K applied to corn. On medium STK soils going into the last year of alfalfa, applying fertilizer K to first‐year corn rather than alfalfa may enhance economic return.</jats:p> |
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spelling | Yost, Matt A. Russelle, Michael P. Coulter, Jeffrey A. Sheaffer, Craig C. Kaiser, Daniel E. 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2011.0183 <jats:p>High K fertilizer prices in recent years have made it imperative for growers to apply optimum K rates to alfalfa (<jats:italic>Medicago sativa</jats:italic> L.). Current university fertilizer guidelines in the Corn Belt do not change for the last production year, when alfalfa stand persistence is not a major concern. Furthermore, little is known about carryover of K applied to alfalfa on first‐year corn (<jats:italic>Zea mays</jats:italic> L.) grain and silage yields. In 2008 to 2010, on‐farm research was conducted on 10 fields with medium soil test potassium (STK) to determine response to K for alfalfa yield and quality in the last production year, and to estimate K carryover to first‐year corn. Alfalfa yield and relative feed value (RFV) and quality (RFQ) did not improve with K fertilization. Herbage K concentration and K uptake increased with K fertilization across sites, indicating that applied K was available during the season of application. When corn relied on carryover K alone, each 100 kg ha<jats:sup>−1</jats:sup> increase in the index of available K increased corn grain yield by 0.5 Mg ha<jats:sup>−1</jats:sup>, decreased stover yield by 0.4 Mg ha<jats:sup>−1</jats:sup>, and did not affect silage yields. Regardless of K rate applied to alfalfa, additional K applied to corn increased corn stover and silage yields by 10 and 8%, respectively. This suggests that carryover K was less available than K applied to corn. On medium STK soils going into the last year of alfalfa, applying fertilizer K to first‐year corn rather than alfalfa may enhance economic return.</jats:p> Potassium Management during the Rotation from Alfalfa to Corn Agronomy Journal |
spellingShingle | Yost, Matt A., Russelle, Michael P., Coulter, Jeffrey A., Sheaffer, Craig C., Kaiser, Daniel E., Agronomy Journal, Potassium Management during the Rotation from Alfalfa to Corn, Agronomy and Crop Science |
title | Potassium Management during the Rotation from Alfalfa to Corn |
title_full | Potassium Management during the Rotation from Alfalfa to Corn |
title_fullStr | Potassium Management during the Rotation from Alfalfa to Corn |
title_full_unstemmed | Potassium Management during the Rotation from Alfalfa to Corn |
title_short | Potassium Management during the Rotation from Alfalfa to Corn |
title_sort | potassium management during the rotation from alfalfa to corn |
title_unstemmed | Potassium Management during the Rotation from Alfalfa to Corn |
topic | Agronomy and Crop Science |
url | http://dx.doi.org/10.2134/agronj2011.0183 |