Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Cox, Michael S.
Committee Member
Wallace, Teddy P.
Committee Member
Henry, Brien W.
Committee Member
Kingery, William
Date of Degree
12-11-2015
Document Type
Graduate Thesis - Open Access
Major
Agronomy
Degree Name
Master of Science
College
College of Agriculture and Life Sciences
Department
Department of Plant and Soil Sciences
Abstract
A greenhouse pot study was conducted on three soils with varying clay contents to establish K critical value at -3 and -1/3 bar soil moisture levels. Four K fertilizer treatments (0, 0.07, 0.14, and 0.3 g/pot) replicated three times were arranged in a complete randomized block design. The Cate-Nelson graphical procedure revealed that K critical values for corn and soybeans were not equal at the two designated moisture levels. The corresponding percentage yield however was higher at -1/3 bars for corn and at -3 bars for soybean. Statistical regression analysis showed that there was a minor response in plant tissue K to changes in soil test K at both soil moisture levels. The ANOVA at 0.05 significance level showed the observed data were consistent with the null hypothesis that there was no significant difference between plant percentage yield and the increasing K fertilizer application rates at the two moisture levels.
URI
https://hdl.handle.net/11668/20404
Recommended Citation
Qoto, Julia Nyembezi, "K Calibration for Corn and Soybean at -3 and -1/3 Bar Soil Moisture Levels (A Case Study of Some Malawi Soils)" (2015). Theses and Dissertations. 2895.
https://scholarsjunction.msstate.edu/td/2895
Comments
K correlation||K diffusion||K antagonistic relationships||soil test K||plant tissue K||K fertilizer recommendations||Malawi agriculture||irrigation management||Malawi soils