The relation between yield indices of maize plant and soil physicochemical characteristics

Abstract

The aim of this study was to set regression models based on correlation between yieldparameters of maize plant (height, thousand seed weight and yield) and physical andchemical characteristics of soils and to determine applicability of obtained models inestimation of plant yield grown in soils of Çarşamba Plain. Regression coefficient (R), rootmean square error (RMSE), index of agreement , model efficiency (ME) were evaluatedto determine the validity of regression models between the yield components and physicaland chemical characteristics of 40 soil samples taken from root zone of cultivated farms.Model associated with the relation between (i) plant height and bulk density (BD), fieldcapacity (FC), clay and sand content wasn’t statistical significant (R= 0.53, p>0.05); (ii)thousand seed weight and soil electrical conductivity (EC), organic matter (OM), lime(CaCO3), nitrogen (N), phosphorus (P), potassium (K), Ca + Mg was characterized with amoderate R (R=0.79, p < 0.05), and (iii) seed yield and OM, N, P, K, copper (Cu), cationexchange capacity (CEC), CaCO3 indices has the highest R (R = 0.87; p