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

This Article 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 Google Scholar Google Scholar Articles by Howard, D. D. Articles by Logan, J. Search for Related Content PubMed Articles by Howard, D. D. Articles by Logan, J. Agricola Articles by Howard, D. D. Articles by Logan, J. Related Collections Maize Crop Systems Nutrient Management Tillage

SOIL FERTILITY

Long-Term Broadcast and Banded Phosphorus Fertilization of Corn Produced Using Two Tillage Systems

^a Dep. of Plant and Soil Sci., West Tennessee Exp. Stn., 605 Airways Blvd., Jackson, TN 38301
^b Dep. of Plant and Soil Sci., Univ. of Tennessee, P.O. Box 1071, Knoxville, TN 37901-1071

* Corresponding author (dhoward2{at}utk.edu)

Received for publication April 14, 2000. Surface-broadcasting P is a management concern in no-till (NT) corn (Zea mays L.) production. Field research was established in 1983 and continued through 1993 to evaluate broadcast and banded P applications for corn produced utilizing NT and disk-till (DT) systems on a Loring silt loam (Oxyaquic Fragiudalfs). A wheat (Triticum aestivum L.) cover was established each fall. The tillage systems were main plots with a factorial arrangement of broadcast P rates, and the N + P band treatments were subplots. Annual broadcast P rates were 0, 20, 39, and 59 kg ha^-1. A 22–20–0 kg ha^-1 N + P band was applied after planting. All plots received a total of 168 kg N ha^-1 each year. Disk-till yields were higher than NT yields for 5 of the 11 yr and were increased by P rates up to 39 kg ha^-1. No-till yields were increased with P rates up to 20 kg ha^-1. Yield response to banding N + P was inconsistent with year, tillage, and P rates. Three banded N + P plus broadcast P combinations equal to a broadcast P rate were applied each of the 11 yr. Yields for 5 of the 33 comparisons were increased by the banded plus broadcast P combination while three yields were reduced relative to broadcasting equal P rates. Yields for the other 25 comparisons were similar. Extractable P (EP) was increased with increased broadcast P rates, but the yield response was generally restricted to low EP situations.

Abbreviations: DT, disk-till • EP, extractable phosphorus • NT, no-till