Dear sir, It givesme much pleasure to write to you to have some information about humic acid kinds and prices and the method which every kind of humic acid to soil to accurate the suitable kind which are suitable to used in my soil. my mail: xxxxx And please send to my the manual of your company by letter because I need it for official procedure My work address : Egypt , Alexandria & el ameria - el nasria xxxxx. 11753 maruot research station, Thank you very much for your time and attention, Very truly you, Mr.: ahmed abou shady