|Camp Jr, Carl
Submitted to: Irrigation Associations Exposition and Technical Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 9/10/2002
Publication Date: 9/10/2002
Citation: SADLER, E.J., CAMP JR, C.R. SPATIAL VARIATION IN CROP RESPONSE: I. OVERVIEW FOR VARIABLE IRRIGATION OF CORN. CD-ROM. IRRIGATION ASSOCIATIONS EXPOSITION AND TECHNICAL CONFERENCE PROCEEDINGS. 2002. 8 P.
Technical Abstract: During the 1990's, independent research at four sites created methods to apply irrigation water in a site-specific manner, both along the direction of travel and along the boom of moving irrigation systems. At one of these, ARS - Florence, SC, research in this area produced more than 25 publications dealing with specific aspects of the system and research results, and these need to be integrated into a comprehensive summary. This paper provides an overview of the project, sets it in the context of the preceding Florence research, and provides the foundation for a companion paper that examines site-specific irrigation and nitrogen production functions for representative soils of the southeast US Coastal Plain. In these two papers, data are discussed from two experiments that were conducted during 1999-2001 using the two site-specific center pivots in the irrigation facility. Both used corn as the first test crop. One was a 144-plot irrigation x nitrogen experiment on the predominant soil map unit for the area, and the other was a 396-plot irrigation x nitrogen x soil experiment on a field with 12 soil map units. This paper shows the spatial variation in crop response that was obtained; the companion paper discusses implications for irrigation management.