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 Heatherly, L. G. Articles by Spurlock, S. R. Search for Related Content PubMed Articles by Heatherly, L. G. Articles by Spurlock, S. R. Agricola Articles by Heatherly, L. G. Articles by Spurlock, S. R. Related Collections Soybean Economics Rice Crop Rotation Systems Agricultural Systems Crop Systems Irrigation

INTEGRATED SYSTEMS

Furrow and Flood Irrigation of Early-Planted, Early-Maturing Soybean Rotated with Rice

^a USDA-ARS, Crop Genetics and Prod. Res. Unit, P.O. Box 343, Stoneville, MS 38776 USA
^b Dep. of Agric. Econ., Mississippi State, MS 39762 USA

lheather{at}ag.gov

The ESPS (Early Soybean Production System) is being adopted in the midsouthern USA to avoid some of the effects of normal late-season drought. Field studies with soybean [Glycine max (L.) Merr.] grown following rice (Oryza sativa L.) were conducted in 1994, 1995, and 1996 at Stoneville, MS, on Sharkey clay (very-fine, smectitic, thermic Chromic Epiaquert) to compare yield of Maturity Group (MG) IV and V cultivars grown under furrow vs. flood irrigation, and yield and economic performance of nonirrigated (NI) and furrow- and flood-irrigated MG IV and V cultivars. Three-year average yields from irrigated MG IV and V cultivars were significantly greater than average NI yield. Within each year, yields from MG V cultivars equaled or exceeded those from MG IV cultivars in all environments. Furrow-irrigated MG IV cultivars yielded significantly more than NI cultivars in all 3 yr, while flood-irrigated MG IV cultivars yielded more than NI cultivars in 2 of the 3 yr. Both furrow- and flood-irrigated MG V cultivars yielded significantly more than NI cultivars in 2 of the 3 yr. Three-year average net returns from furrow- and flood-irrigated environments were similar, and both were greater than those from the NI. Within each year, average net return from MG V cultivars in all environments was equal to or greater than that from MG IV cultivars. These results indicate that the ESPS can be used to effectively grow soybean in a rice–soybean rotation on clay soil, and that irrigation will usually result in greater profit from soybean.

Abbreviations: CSPS, Conventional Soybean Production System • ESPS, Early Soybean Production System • MG, maturity group • NI, nonirrigated