R2>0.88**). Significant regression equations were established between grain protein content and SPAD value for all varieties studied in this experiment (0.40**>R2>0.79**). The best correlation between the SPAD meter readings with foliar N concentrations and grain protein contents were obtained at GS 41. The results indicate that SPAD meter can be a useful tool for nondestructively assessing foliar N status of winter wheat to make N recommendations and protein content in grain, but SPAD readings should be calibrated for wheat dominant varieties cultivated in west Azerbaijan regions.]]>
p. 245−254
2228-7132
Vol.28/No.2
p. 255−264
2228-7132
Vol.28/No.2
p. 265−275
2228-7132
Vol.28/No.2
p. 277−584
2228-7132
Vol.28/No.2
p. 287−293
2228-7132
Vol.28/No.2
p. 296−312
2228-7132
Vol.28/No.2
p. 313−329
2228-7132
Vol.28/No.2
p. 332−339
2228-7132
Vol.28/No.2
p. 341−350
2228-7132
Vol.28/No.2
p. 351−362
2228-7132
Vol.28/No.2
carbonatic > organic > adsorbed and in clay loam texture were as: residual > carbonatic > adsorbed. In clay loam texture treated with sewage sludge, good correlations were observed between Zn concentration in corn shoot with carbonatic, adsorbed and residual forms and in sandy texture these relationships were significant for adsorbed, carbonatic, organic, and residual. Based on the calculated IR, bioavailability of Zn in sandy texture, in both the control and all sewage sludge treated samples were higher than those of clay loam texture. In sandy texture, increasing sewage sludge levels increased Zn bioavailability; however, this trend was not observed in clay loam texture. In general, influence of sewage sludge application on Zn chemical forms and its bioavailability and the relationships between these forms and Zn concentration in corn plant was different for the studied soil textural classes, which should be considered in the management and application rates of sewage sludge.]]>
p. 363−374
2228-7132
Vol.28/No.2
p. 375−386
2228-7132
Vol.28/No.2
p. 387−396
2228-7132
Vol.28/No.2
p. 397−406
2228-7132
Vol.28/No.2
p. 407−419
2228-7132
Vol.28/No.2
p. 421−431
2228-7132
Vol.28/No.2
p. 433−446
2228-7132
Vol.28/No.2
p. 447−458
2228-7132
Vol.28/No.2
p. 459−468
2228-7132
Vol.28/No.2
p. 469−475
2228-7132
Vol.28/No.2