Well-aged cow manure should be applied at a rate of between 25 to 100 lbs. of manure for every 100 square feet of garden. If a crop is described as a "heavy feeder," use the upper end of the scale for garden fertilization. On the other hand, if you are advised to "avoid excess nitrogen," you can confidently apply cow manure at the lower end of the range.
About this Author
Melissa Jordan-Reilly has been a writer for 20 years, both as a newspaper reporter and as an editor of nonprofit newsletters. Among the publications in which she has published are, "The Winsted Journal," "Taconic" and "Compass Magazine." A graduate of the University of Connecticut, Jordan-Reilly also pursues sustainable agriculture techniques and tends a market garden at her Northwestern Connecticut home.