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Craig J. Frey, Xin Zhao, Jeffrey K. Brecht, Dustin M. Huff, and Zachary E. Black

-tunnel plots. Differences were due to extended tomato harvests in the high tunnels; weekly fertigation rates per crop stage were the same in each production system. In 2017, total season applications of N, P, and K through fertigation in both production systems

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R.S. Mylavarapu

major groups of soils. Interpretation of the test results for the intended application is the second and most important step in the entire process. State laboratories backed by nutrient management and environmental quality research information make the

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Matt A. Rudisill, Bruce P. Bordelon, Ronald F. Turco, and Lori A. Hoagland

open field systems after 3 years of repeated fertility application. Total soil nutrients. Soil P was significantly impacted by both production system and fertility treatment. The high tunnel contained more available P (Bray-1 P) and potentially

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Rhuanito Soranz Ferrarezi, Sue K. Dove, and Marc W. van Iersel

system maintained the VWC close to the thresholds throughout the study. This soil moisture sensor-based irrigation supplies water according to plant demand, which is useful for plant physiology and irrigation research as well as commercial applications

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K. Delate, C. Cambardella, and A. McKern

June to test the effect of an additional N application on strip-tilled plant growth. Table 1. Pepper system field operations in 2001–03 at the Muscatine Island Research Farm, Fruitland, IA. ‘Red Knight’ bell pepper seeds (Johnny's Selected Seeds, Albion

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Laurence Gendron, Guillaume Létourneau, Julien Cormier, Claire Depardieu, Carole Boily, Raymond Levallois, and Jean Caron

water applications generated enough additional benefits compared with nonpulsed irrigation to cover the cost of an automated irrigation system, with net gains of $14,295/ha on site 1 and $9356/ha on site 2. The payback period in these scenarios was less

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Kuan Qin and Daniel I. Leskovar

). Therefore, sustainable agricultural systems that include the combination of optimized irrigation and organic input could be applied in the production of horticultural crops to address the pressing social, economic, and environmental issues of water shortage

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Marco Bittelli

. Rouiller, D. 2002 A new system for fast mapping of ER (A.R.P.): Field application. Proc. 6th Intl. Conf. Precision Agriculture and Other Precision Resources Management Minneapolis, MN 121 129 Dubois, P.C. van Zyl, J. Engman, T. 1995 Measuring soil moisture

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Kent D. Kobayashi

their expanding use in agriculture and horticulture ( Cunha et al., 2010 ; Delgado et al., 2013 ). The diverse range of software applications for these devices make them powerful tools for education ( Hlodan, 2010 ), extension ( Drill, 2012 ), and

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Gary W. Stutte

refinements of this 19th century technology for modern residential and commercial lighting applications ( Wheeler, 2008 ). NASA’s funding of research on use of LEDs as a light source for space-based plant growth systems in the late 1980s signaled the beginning