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Soil fertility status in Ohio and Indiana and the association between soil fertility and soybean grain yield in Ohio

Brooker, Aaron P
http://rave.ohiolink.edu/etdc/view?acc_num=osu1460041595

Abstract Details

2016, Master of Science, Ohio State University, Horticulture and Crop Science.
Soil fertility is one of the major factors that influences soybean [Glycine max (L.) merr] grain yield. Two experiments were completed in Ohio and Indiana with the objectives 1.) to assess the status of soil fertility in each state, and 2.) to determine the impact of soil fertility on soybean grain yield in Ohio. Sampling was conducted from 2013 through 2015 in Ohio resulting in 624 total samples, and from 2010 through 2014 in Indiana resulting in 483 total samples. In both states, soil P, K, pH, Ca, Mg, organic matter (OM), cation exchange capacity (CEC), and soil texture were measured. Plant nutrient concentrations for P, K, N, Mg, Ca, and S were also measured in the leaf tissue at R1-R2. Yield was also measured in the Ohio sampling. In Ohio, 35% and 21% of the soil samples collected were below the state-established critical levels (CL) for P and K, respectively. Additionally, in Ohio, 18% of soil samples had a pH <6.0, and 29% had a pH > 6.8. In Indiana, 30% and 41% of the soil samples collected were below the CL for P and K, respectively. Also, 22% of soil samples had a pH <6.0, and 19% had a pH > 6.8. For the leaf tissue analyses, < 10% of samples were below the sufficiency range for any nutrient except for N in Ohio where 14% of samples were below sufficiency and K in Indiana where 38% of the leaf tissue samples were below sufficiency. Seventy-seven percent of fields had at least one sample below the P CL or within the maintenance range, while 23% of fields had all samples above the maintenance range. For K, 56% of fields had at least one sample below the CL or within the maintenance range, while 44% of fields had all samples above the maintenance range. For pH, 31% of fields had at least one sample below the optimal range, while 69% had no samples below the optimal range. In Ohio, soybean grain yield reductions of 7 and 4 bu/acre were associated with P and K levels below the CL, respectively. Low leaf tissue P, K, and N levels were associated with yield reductions of 16, 12, 8 bu/acre respectively. Despite larger yield differences associated with leaf tissue nutrient levels compared to soil-test levels, fertilization recommendations in Ohio and Indiana are still made based on soil test levels.
Laura Lindsey (Advisor)
Steven Culman (Committee Member)
Peter Thomison (Committee Member)
Sakthi Subburayalu (Committee Member)
122 p.
Agronomy
soybean; soil fertility; phosphorus; potassium; pH; Ohio; Indiana

Recommended Citations

Citations

  • Brooker, A. P. (2016). Soil fertility status in Ohio and Indiana and the association between soil fertility and soybean grain yield in Ohio [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460041595

    APA Style (7th edition)

  • Brooker, Aaron. Soil fertility status in Ohio and Indiana and the association between soil fertility and soybean grain yield in Ohio. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1460041595.

    MLA Style (8th edition)

  • Brooker, Aaron. "Soil fertility status in Ohio and Indiana and the association between soil fertility and soybean grain yield in Ohio." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460041595

    Chicago Manual of Style (17th edition)

osu1460041595
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This open access ETD is published by The Ohio State University and OhioLINK.