united states department of agriculture rural business cooperative service rbs research report 201 marketing operations dairy cooperatives 2002 abstract the nation s 196 marketed 139 2 billion pounds milk delivered by its 61 390 member producers or 83 percent all sold to plants and dealers in including non volume was 144 3 86 us total forty six operated 174 processing manufacturing 19 handled through receiving sta tions only 131 had no handling facilities addition invest ment but did not directly operate 75 71 butter nonfat dry 40 natural cheese 7 packaged fluid products 9 cottage ice cream 6 mix yogurt 53 bulk condensed 52 whey 13 sour 34 buttermilk key words