Fertilizer
Heping Zhu and Adam Clark at the Application Technology Research Unit of the Agricultural Research Service (ARS) in Wooster, Ohio, have developed an easy-to-use and easy-to-build portable instrument so that farmers and greenhouse growers can test the accuracy of their pressure gauges.
Slow-release nutrient amendments, particularly those from plants and animal sources, are becoming increasingly popular in greenhouses and in certified organic farming. Depending on what material is being used, these amendments can vary in the amount, timing and balance of nutrients released. This makes managing soil fertility very challenging if you are a gardener, farmer or greenhouse operator.

University of Guelph research is optimizing application methods of root-growth stimulants to ensure plants are well-anchored in the pot.

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