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Sweet corn response to banded phosphorus in the Willamette Valley

    Six field experiments were conducted during 2012 and 2013 in the Willamette Valley, OR to evaluate corn ear yield and quality response to starter P fertilizer and whether current Oregon State University recommendations for starter P application are supported by recent data with contemporary corn varieties and production practices. While yield was not impacted by starter P fertilizer addition at any site-year, visual symptoms of P deficiency were observed at the site with the lowest soil test P value (42 mg kg-1). This research supports a 50 mg kg-1 P sufficiency threshold for modern sweet corn varieties.

    The Bronson Files, Dataset 10, Field 113, 2018 Cotton

      Dr. Kevin Bronson provides a dataset representing the third of three consecutive years of cotton and nitrogen management experimentation in Field 113 of the Maricopa Agricultural Center, Arizona USA. Included is an intermediate analysis mega-table of correlated and calculated parameters, laboratory analysis results generated during the experimentation, plus high-resolution plot level intermediate data analysis tables of SAS process output, as well as the complete raw data sensor recorded logger outputs. Note that the second and third year of F113 cotton experimentation includes a large utilization of depleted nitrogen-15 isotope tracing to support evaluation of nitrogen use and uptake.

      A Survey to Evaluate the Current Status of Land Grant University and State Department of Agriculture Soil Fertility Recommendations and Analytical Methods

        Results of a survey to collect contemporary information from our land-grant university colleagues working in soil fertility. The goals of the survey were to gain a better understanding of the current status of soil testing across the U.S. to inform future collaborative efforts among states and regions, and to identify where opportunities exist to harmonize recommendation guidelines. The objectives were to collect information about state soil test recommendations, fertilization philosophy, analytical methods, and the provenance of correlation and calibration data that support soil-test-based recommendations.

        The Bronson Files, Dataset 9, Field 113, 2017 Cotton

          Dr. Kevin Bronson provides a dataset representing the second of three consecutive years of cotton and nitrogen management experimentation in Field 113. Included is an intermediate analysis mega-table of correlated and calculated parameters, laboratory analysis results generated during the experimentation, plus high-resolution plot level intermediate data analysis tables of SAS process output, as well as the complete raw data sensor recorded logger outputs. Note that the second and third year of F113 cotton experimentation includes a large utilization of depleted nitrogen-15 isotope tracing to support evaluation of nitrogen use and uptake.

          Soybean Yield Response to Fertilizer-Phosphorus Rate on Soils having different Mehlich-3 Phosphorus Values in Arkansas

            Soybean response to fertilizer-phosphorus (P) fertilization experiments were conducted at 39 sites in Arkansas from 2004-2018 with the main objective of developing data to correlate and calibrate fertilizer-P rate recommendations for irrigated soybean [Glycine max (L.) Merr.] in Arkansas. The dataset includes information for 39 site-years representing eight eastern Arkansas counties including Arkansas (4), Clay (1), Cross (3), Desha (2), Lee (4), Poinsett (9), St. Francis (15), and Woodruff (1).

            The Bronson Files, Dataset 8, Field 113, 2016

              Dr. Kevin Bronson provides this dataset representing the first of three consecutive years of cotton and nitrogen management experimentation in Field 113. Included, is an intermediate analysis mega-table of correlated and calculated parameters, laboratory analysis results generated during the experimentation, plus high-resolution plot level intermediate data analysis tables of SAS process output, as well as the complete raw data sensor recorded logger outputs.

              The Bronson Files, Dataset 7, Field 13, 2015

                Dr. Kevin Bronson provides a second year of water management in cotton agricultural research experiment dataset for compute, including notation of field events and operations, an intermediate analysis mega-table of correlated and calculated parameters, and laboratory analysis results generated during the experimentation, plus high-resolution plot level intermediate data analysis tables of SAS process output, as well as the complete raw data sensor recorded logger outputs.

                Legacy Phosphorus and Potassium Correlation Experiments: Qulin, Missouri

                  Correlation experiments for P and K were conducted from 1968-1973 at a research farm in Qulin, Missouri to better define the relationships between soil tests, crop yields, and fertilizer treatments. Three crop rotations each were conducted for P and K trials (ranges C, D, E, F, G, and H), and included corn, soybean, wheat, cotton, and sorghum.