The present study was designed to determine the effects of glyphosate, mancozeb and diazinon with three different soil orders and two soil moisture contents and their combinations on some soil microbial population in a pot experiment. The main results obtained at the last periods (4 th and 5 th samplings) of the study demonstrated as: glyphosate showed significant decrease in total actinomycetes and increased total bacteria, proteolytic bacteria and fungi. Mancozeb significantly decreased

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... lytic bacteria and fungi. Diazinon significantly increased total bacteria and proteolytic bacteria. Agholan soil showed the greatest reduction in proteolytic bacteria, fungi and actinomycetes. Debaga soil significantly increased proteolytic bacteria. Girdarasha soil increased proteolytic bacteria, fungi and ac nomycetes. 50% soil moisture content revealed significant increase in total bacteria and proteoly c bacteria. 100% soil moisture content showed significant increase in actinomycetes. The interaction between P1S2 increased total bacteria and ac nomycetes. The interac on P1S3 increased proteoly c bacteria and fungi. The combina on P2S3 caused significant reduc on in fungi and ac nomycetes. The combina on P2S2 revealed significant reduction in fungi and ac nomycetes. The interac on P2S3 showed the greatest increase in proteoly c bacteria. The combina on P3S1 reduced ac nomycetes. The interac on P3S2 increased total bacteria and proteoly c bacteria. The combina on P3S3 increased proteolytic bacteria. The combina on CS1 showed decreasing effect on proteoly c bacteria; CS2 showed decreasing effect on total proteoly c bacteria; CS3 increased ac nomycetes and decreased proteoly c bacteria. The combina on P1W1 increased total bacteria and fungi, whereas P1W2 increased ac nomycetes and proteoly c bacteria. The combina on CW2 reduced proteoly c bacteria and ac nomycetes. The interac on S1W1 decreased fungi, whereas, S1W2 reduced total bacteria and fungi. The interac on S3W1increased total bacteria; the interac on S3W2 caused the highest increasing in ac nomycetes. The combina ons: P1S2W1 increased total bacteria and ac nomycetes; P1S2W2 increased ac nomycetes; P1S3W1 increased total bacteria and fungi. The interac on P2S3W2 http://dx.