PENGARUH PENGOLAHAN TANAH TERHADAP JUMLAH SIMPANAN BIJI GULMA DI DALAM TANAH PADA TANAH ALLUVIAL

This study aims to determine the effect of tillage on amount deposits weed seeds in soil alluvial soil. Research conducted at Faculty Agriculture experimental field Tanjungpura August December 2014. Identification and data processing carried out Laboratory Plant Pests University . using observation method with weeds growing vegetation analysis after tillage. Observations were made 1 times , 2 3 4 times. Results this indicate that there are five species have highest seed bank a value SDR above 10 % is considered an important is, Borreria alata, Cyrtococcum sp, Ageratum conyzoides, Ludwigia parennis Phyllantus debilis. Based results concluded as many can reduce if done before produce seeds.Keywords: alluvial, tillage,