HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (26) Citing Articles via Google Scholar Google Scholar Articles by Mamo, M. Articles by Strock, J. Search for Related Content PubMed Articles by Mamo, M. Articles by Strock, J. Agricola Articles by Mamo, M. Articles by Strock, J. Related Collections Spatial Distribution Maize Nutrient Management Production Agriculture Nitrogen Site-Specific Analysis

SITE-SPECIFIC MANAGEMENT

Spatial and Temporal Variation in Economically Optimum Nitrogen Rate for Corn

^a Dep. of Agron. and Hortic., Univ. of Nebraska, Lincoln, NE 68583-0915
^b Dep. of Soil, Water, and Climate, Univ. of Minnesota, 1991 Upper Buford Circle, St. Paul, MN 55108
^c USDA-ARS, Washington State Univ., Pullman, WA 22222

^* Corresponding author (mmamo3{at}unl.edu)

Received for publication June 4, 2002. The economically optimum N rate (EONR) required for corn (Zea mays L.) may vary spatially due to variation in soil characteristics and temporally due to the interactions of environmental factors. The objectives of this research were to quantify the impact of field variability on the yield response of corn to N fertilization and to evaluate the temporal stability of these response functions. A production field near Revere, MN, was cropped with corn in 1995, 1997, and 1999 in rotation with soybean [Glycine max (L.) Merr.]. Four replications of seven treatments were established in a split-plot arrangement of a randomized complete block design. Main plots consisted of three N rates (0, 67, 134, and 202 kg ha^-1) while the split plots were two rates (0 and 0.56 kg ha^-1) of nitrapyrin [2-chloro-6 (trichloromethyl)-pyridine]. Each replication was divided into subblocks to estimate spatial patterns in yield N response and EONR. Spatial analysis indicated that only half of the field responded to N. Uniform application recommendation of 145 kg N ha^-1 for the whole field overfertilized these areas while other areas were underfertilized. Variable-rate N applications according to the EONR would have resulted in 69 and 75 kg ha^-1 less N being applied than the uniform N rate in 1997 and 1999, respectively. Potential economic benefits were $8 and $23 ha^-1 higher than the uniform N rate in 1997 and 1999, respectively. Approximately 60% of the field responded in a similar manner in both 1997 and 1999, suggesting that temporal variations must also be considered with site-specific N management.

Abbreviations: EONR, economically optimum nitrogen rate • OM, organic matter • YEONR, yield at economically optimum nitrogen rate

This article has been cited by other articles:

				J. A. Hernandez and D. J. Mulla Estimating Uncertainty of Economically Optimum Fertilizer Rates Agron. J., September 1, 2008; 100(5): 1221 - 1229. [Abstract] [Full Text] [PDF]

				J. L. Ping, R. B. Ferguson, and A. Dobermann Site-Specific Nitrogen and Plant Density Management in Irrigated Maize Agron. J., June 23, 2008; 100(4): 1193 - 1204. [Abstract] [Full Text] [PDF]

				F. Solari, J. Shanahan, R. Ferguson, J. Schepers, and A. Gitelson Active Sensor Reflectance Measurements of Corn Nitrogen Status and Yield Potential Agron. J., May 7, 2008; 100(3): 571 - 579. [Abstract] [Full Text] [PDF]

				Y. Miao, D. J. Mulla, J. A. Hernandez, M. Wiebers, and P. C. Robert Potential Impact of Precision Nitrogen Management on Corn Yield, Protein Content, and Test Weight Soil Sci. Soc. Am. J., August 9, 2007; 71(5): 1490 - 1499. [Abstract] [Full Text] [PDF]

				P. M. Kyveryga, A. M. Blackmer, and T. F. Morris Alternative Benchmarks for Economically Optimal Rates of Nitrogen Fertilization for Corn Agron. J., June 5, 2007; 99(4): 1057 - 1065. [Abstract] [Full Text] [PDF]

				B. L. Ma, K. D. Subedi, and T. Q. Zhang Pre-Sidedress Nitrate Test and Other Crop-Based Indicators for Fresh Market and Processing Sweet Corn Agron. J., January 1, 2007; 99(1): 174 - 183. [Abstract] [Full Text] [PDF]

				J. P. Schmidt, N. Hong, A. Dellinger, D. B. Beegle, and H. Lin Hillslope Variability in Corn Response to Nitrogen Linked to In-Season Soil Moisture Redistribution Agron. J., January 1, 2007; 99(1): 229 - 237. [Abstract] [Full Text] [PDF]

				P. C. Scharf, N. R. Kitchen, K. A. Sudduth, and J. G. Davis Spatially Variable Corn Yield is a Weak Predictor of Optimal Nitrogen Rate Soil Sci. Soc. Am. J., October 27, 2006; 70(6): 2154 - 2160. [Abstract] [Full Text] [PDF]

				R. P. Sripada, R. W. Heiniger, J. G. White, and A. D. Meijer Aerial Color Infrared Photography for Determining Early In-Season Nitrogen Requirements in Corn Agron. J., June 5, 2006; 98(4): 968 - 977. [Abstract] [Full Text] [PDF]

				B. D. Kay, A. A. Mahboubi, E. G. Beauchamp, and R. S. Dharmakeerthi Integrating Soil and Weather Data to Describe Variability in Plant Available Nitrogen Soil Sci. Soc. Am. J., May 23, 2006; 70(4): 1210 - 1221. [Abstract] [Full Text] [PDF]

				P. C. Scharf, S. M. Brouder, and R. G. Hoeft Chlorophyll Meter Readings Can Predict Nitrogen Need and Yield Response of Corn in the North-Central USA Agron. J., May 3, 2006; 98(3): 655 - 665. [Abstract] [Full Text] [PDF]

				Y. Miao, D. J. Mulla, W. D. Batchelor, J. O. Paz, P. C. Robert, and M. Wiebers Evaluating Management Zone Optimal Nitrogen Rates with a Crop Growth Model Agron. J., April 11, 2006; 98(3): 545 - 553. [Abstract] [Full Text] [PDF]

				Y. Miao, D. J. Mulla, P. C. Robert, and J. A. Hernandez Within-Field Variation in Corn Yield and Grain Quality Responses to Nitrogen Fertilization and Hybrid Selection Agron. J., January 5, 2006; 98(1): 129 - 140. [Abstract] [Full Text] [PDF]

				D. M. Lambert, J. Lowenberg-DeBoer, and G. L. Malzer Economic Analysis of Spatial-Temporal Patterns in Corn and Soybean Response to Nitrogen and Phosphorus Agron. J., January 3, 2006; 98(1): 43 - 54. [Abstract] [Full Text] [PDF]

				H. Shahandeh, A. L. Wright, F. M. Hons, and R. J. Lascano Spatial and Temporal Variation of Soil Nitrogen Parameters Related to Soil Texture and Corn Yield Agron. J., April 27, 2005; 97(3): 772 - 782. [Abstract] [Full Text] [PDF]

				M. T. Rashid and R. P. Voroney Field-Scale Application of Oily Food Waste and Nitrogen Fertilizer Requirements of Corn at Different Landscape Positions J. Environ. Qual., April 20, 2005; 34(3): 963 - 969. [Abstract] [Full Text] [PDF]

				P. C. Scharf, N. R. Kitchen, K. A. Sudduth, J. G. Davis, V. C. Hubbard, and J. A. Lory Field-Scale Variability in Optimal Nitrogen Fertilizer Rate for Corn Agron. J., March 1, 2005; 97(2): 452 - 461. [Abstract] [Full Text] [PDF]

				T. M. Hurley, G. L. Malzer, and B. Kilian Estimating Site-Specific Nitrogen Crop Response Functions: A Conceptual Framework and Geostatistical Model Agron. J., September 1, 2004; 96(5): 1331 - 1343. [Abstract] [Full Text] [PDF]