About Us


Symptoms of soil illness

Given the current difficulties faced by agricultural producers, the symptoms of soil illness must be correctly identified and actions taken to quickly remedy the problem.

Soils are often debilitated for different reasons. Without treatment, productivity becomes diminished and potential income lost.

Consult with us on improving the condition of your soil. Where required, we can also recommend specialist agronomists to assist you in getting the most from your product.


Manna’s Directors

Leo Killigrew – CEO
Leo has more than 40 years’ experience in soil science, in particular the study of agricultural conditioners, such as Gypsum and Lime.

Simon Killigrew
B.Ec, B.Eng(Mech), MBA, CPA

Dr. Benedict Killigrew
PhD (Agriculture, Viticulture)