The organic matter content of the soil is an indication of soil fertility. Low organic matter content can worsen the water-holding capacity of the soil which is crucial during drought periods. Several methods can be used to enrich soil and increase its fertility, for example through the use of farm yard manure and water hyacinth composts. This practice describes how to prepare and preserve farm yard manure from wastes on the farm and also explains water hyacinth compost preparation, with a practice example on how to apply it on a mango tree.