North central regional potassium studies III. Field studies with corn
dc.contributor.author | Hanway, J. J. | |
dc.contributor.department | Extension and Experiment Station Publications | |
dc.date | 2018-02-18T14:03:14.000 | |
dc.date.accessioned | 2020-06-30T06:59:26Z | |
dc.date.available | 2020-06-30T06:59:26Z | |
dc.date.embargo | 2017-06-19 | |
dc.date.issued | 2017-06-19 | |
dc.description.abstract | <p>Corn is sensitive to a deficiency of potassium (K),<sup>2</sup> and yields of corn on K-deficient soils often are increased by K fertilizer applications. K deficiencies in corn have been observed or yield increases have been obtained from K fertilizer applications on many soils in the North Central Region of the United States. However, many other soils in the region have high levels of available K, and applications of K fertilizers on these soils have not increased corn yields. Therefore, it is important to have effective methods of estimating plant availability of K in different soils and to develop methods of predicting the yield response which can be expected from applications of K fertilizer for corn grown on different soils.</p> <p>The increases in yields of corn and other crops obtained from applications of K fertilizer have been shown in some studies to be inversely related to the level of exchangeable K in air-dry samples of the surface soil (5, 7). Therefore, this determination is commonly used in soil testing laboratories to estimate K availability. Other studies, however, have shown that the amount of exchangeable K in some soils is markedly changed by drying the soil (1, 2, 9, 17, 18). In some of these studies, the level of exchangeable K in undried soil samples provided a better estimate of K availability to plants than did the exchangeable K in dry soil samples (2,9,17). Matthews and Sherrell (18), on the other hand, studied the relation between exchangeable K in the soil and the yield of potatoes grown on sandy soils in Ontario, Canada and found a higher correlation with exchangeable K values for oven-dry soils than for undried soils.</p> | |
dc.identifier | archive/lib.dr.iastate.edu/researchbulletin/vol34/iss503/1/ | |
dc.identifier.articleid | 1517 | |
dc.identifier.contextkey | 10320667 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | researchbulletin/vol34/iss503/1 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/62842 | |
dc.source.bitstream | archive/lib.dr.iastate.edu/researchbulletin/vol34/iss503/1/Agricultural_Research_Bulletin_v034_b503.pdf|||Fri Jan 14 17:42:26 UTC 2022 | |
dc.subject.disciplines | Agriculture | |
dc.subject.disciplines | Agronomy and Crop Sciences | |
dc.title | North central regional potassium studies III. Field studies with corn | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isJournalIssueOfPublication | 8a9eba07-cefe-4572-8855-ac7659cf4be5 | |
relation.isOrgUnitOfPublication | 302bd0e8-f82f-406a-88b5-c8f956b5f77b |
File
Original bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- Agricultural_Research_Bulletin_v034_b503.pdf
- Size:
- 2.67 MB
- Format:
- Adobe Portable Document Format
- Description: