Grid processing was carried out to the Dandong district.The Gauss point source proliferation was carried out to calculate SO2.By dint of Visual Basic 6.0,the pr
[Objective]The paper was to study the severity of mustard clubtoot under different pH conditions and to clear the relationship between pH and mustard clubroot.[Met
The damage characteristics and occurrence regularity of radish alternaria leaf spot, black rot, soft rot, virus disease and hollowness are introduced in the pap