00504nam a2200133   4500003000400000082001800004245009500022260007400117300000900191500008700200546001200287650002000299650005100319OSt  aNCPA/PRb1987  aNational seminar on use of plastics in agriculture:bheld at vigyan bhawan,february 6,1987  aNew DelhibThe directorate of extension,ministry of agriculturec1987  a99p.  aIn collaboration with the National Committee on the use of Plastics in Agriculture  aEnglish  aDrip irrigation  aPlastics in packaging of agricultural products