| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Dep. of Agronomy, Purdue Univ., West Lafayette, IN 47907-1150
* Corresponding author (tvyn{at}purdue.edu)
Received for publication October 10, 2001. More information is needed about optimum potassium (K) fertilizer placement for soybean [Glycine max (L.) Merr.] production in no-till fields. This study was conducted at two locations in Ontario, Canada, from 1998 to 2000 to examine soybean responses to K placement methods and tillage systems on soils with a 5- to 7-yr no-till history and medium to high soil-test K levels. Fertilizer K treatments (15-cm deep banding in fall, 7.5-cm shallow banding in spring, surface broadcast in fall, and a zero K control) were compared in three conservation tillage systems (fall zone-till, fall disk, and no-till). The K fertilizer rate was 100 kg ha-1 for all but the control treatment. Soybean row widths (76 or 38 cm) varied with tillage systems, and soybean rows were positioned above K fertilizer bands if applicable. Yield responses to K application occurred in the fall zone-till and no-till systems on some medium- to high-testing soils. There was no significant leaf K or seed yield advantage to band placement compared to surface broadcasting, and to fall zone-till or fall disk systems relative to no-till, for soybean of similar row width. Neither leaf K nor seed yield was negatively affected by degree of soil K stratification. Despite vertical soil K stratification after continuous no-till, there was no significant leaf K or yield benefit to replacing narrow-row, no-till soybean systems (involving surface K fertilizer application) with wide-row zone-till or no-till systems (involving deep banding of K), or with narrow-row, fall disk systems (involving surface-applied, but tillage-incorporated K).
Abbreviations: FD (38), fall disk with 38-cm row width • NT (38), no-till with 38-cm row width • NT (76), no-till with 76-cm row width • OCHU, Ontario Crop Heat Units • ZT (76), fall zone-till with 76-cm row width
This article has been cited by other articles:
|
|
 |
|
  B. R. B. Coelho, R. C. Roy, A. J. Bruin, A. More, and P. White Zonejection: Conservation Tillage Manure Nutrient Delivery System Agron. J., January 8, 2009; 101(1): 215 - 225. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 F. G. Fernandez, S. M. Brouder, C. A. Beyrouty, J. J. Volenec, and R. Hoyum Assessment of Plant-Available Potassium for No-Till, Rainfed Soybean Soil Sci. Soc. Am. J., June 18, 2008; 72(4): 1085 - 1095. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. P. Mallarino and R. Borges Phosphorus and Potassium Distribution in Soil Following Long-Term Deep-Band Fertilization in Different Tillage Systems Soil Sci. Soc. Am. J., February 27, 2006; 70(2): 702 - 707. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
X. Yin and T. J. Vyn Relationships of Isoflavone, Oil, and Protein in Seed with Yield of Soybean Agron. J., August 17, 2005; 97(5): 1314 - 1321. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
X. Yin and T. J. Vyn Critical Leaf Potassium Concentrations for Yield and Seed Quality of Conservation-Till Soybean Soil Sci. Soc. Am. J., September 1, 2004; 68(5): 1626 - 1634. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
X. Yin and T. J. Vyn Potassium Placement Effects on Yield and Seed Composition of No-Till Soybean Seeded in Alternate Row Widths Agron. J., January 1, 2003; 95(1): 126 - 132. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Crop Science | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
