Effect of P, Zn and Cu fertilization on crops on a calcareous chernozem soil
2002
Kadar, I.
Both deficiency and excess of P, Zn and Cu are common in soils and crops of Hungary. The excess and deficiency of P occuring in agricultural soils and crops is a consequence of previous fertilization practice. Zn deficiency occurs mainly on calcareous soils well fertilized with P under maize, while Cu deficiency is often detected on poor sandy soils and on organic soils under other crops. Zn and Cu excess has been measured in city soils, in soils near highways and industrial areas. In the present paper the effect of P supply is shown on yield and P/Zn ratios of crops, presenting the phenomena of the P-induced Zn deficiency on a calcareous loamy chernozem soil. In an other long-term field trial on the same soil, the effect of Cu and Zn loads was studied on soil and crop.
显示更多 [+] 显示较少 [-]