| dc.contributor.author | Breker, John Steven | |
| dc.description.abstract | Corn (Zea mays L.) production has greatly increased in North Dakota since the 1990s; yet, potassium (K) fertilizer recommendations for corn in North Dakota still date from the late 1970s and early 1980s when corn grain yields were comparatively lower and native soil K fertility was sufficient for most crop K requirements. To update K fertilizer recommendations for modern corn production and lower soil K levels, corn grain yield response to K fertilization, various soil K testing methods, and seasonal soil K variation were investigated in a two-year (2015 and 2016) study. The standard soil K testing method of NH4OAC extraction on dried soil remained the best predictor of yield response, although corn on some soils did not respond in accordance with soil test K level. Soil test K was highest in spring and lowest in late summer, indicating that soil test K interpretation should account for seasonal variation. | en_US |
| dc.publisher | North Dakota State University | en_US |
| dc.rights | NDSU policy 190.6.2 | |
| dc.title | Recalibration of Soil Potassium Test for Corn in North Dakota | en_US |
| dc.type | Thesis | en_US |
| dc.date.accessioned | 2018-07-17T20:27:34Z | |
| dc.date.available | 2018-07-17T20:27:34Z | |
| dc.date.issued | 2017 | en_US |
| dc.identifier.uri | https://hdl.handle.net/10365/28659 | |
| dc.rights.uri | https://www.ndsu.edu/fileadmin/policy/190.pdf | |
| ndsu.degree | Master of Science (MS) | en_US |
| ndsu.college | Agriculture, Food Systems, and Natural Resources | en_US |
| ndsu.department | School of Natural Resource Sciences | en_US |
| ndsu.program | Soil Science | en_US |
| ndsu.advisor | Franzen, Dave | |
