The slow release of nutrients makes mulch the ideal soil amendment for orchards. Research has shown that much of the nitrogen in compost is initially bound in an organic form and is therefore not readily available to plants. However, it is constantly and steadily being mineralized into an available form. In addition, compost provides beneficial micro-nutrients that you may not normally add to the soil.

Mulch will also release the nutrients it contains as the organic material breaks down. This natural process takes place over several months or years depending upon several factors including the moisture content, the average air temperature, the thickness of the mulch layer, and the type of material used to make the mulch.

One of the many benefits of mulch is erosion control. Applying mulch to an area can greatly enhance erosion control. With a healthy layer of mulch, you’re much less likely to lose precious topsoil to a downpour. Erosion control professionals have evaluated mulch and various types of compost under field situations as surface amendment material for erosion control and re-vegetation of disturbed or degraded soils.

Soil erosion is significantly reduced with the use of yard trimmings in commercial citrus orchards. Organic mulches, such as straw and wood fiber, have been found to be very effective in preventing soil erosion.