passages.id: split_1_test_1881_passage
passages.type: progene_text
passages.text: Grain yield was significantly reduced at 95 % level of probability with yield ( when compared with the control ) reduced by as much as 98.6 % , 96.5 % and 58.3 % for preplant , five weeks after planting ( 5 WAP ) and seven weeks after planting ( 7 WAP ) treatments , respectively .