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An organic garden on a school campus. The following outline is provided as an overview of and topical guide to organic gardening and farming: . Organic farming – alternative agricultural system that relies on fertilizers of organic origin such as compost, manure, green manure, and bone meal and places emphasis on techniques such as crop rotation and companion planting.
Organic matter contributes to aggregation and water-retention properties of soil. Soil chemical composition reflects not only the original geologic materials (e.g. limestone, granite, basalt), but also soil-forming processes since deposition. In much of the northern US, soil formation commenced either shortly after glacial retreat at the end of ...
No-till farming has been claimed to increase soil organic matter, and thus increase carbon sequestration. [24] [50] While many studies report soil organic carbon increases in no-till systems, others conclude that these effects may not be observed in all systems, depending on factors, such as climate and topsoil carbon content. [51]
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About 1,000 soil subgroups are defined in the United States. [6] A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include ...
The addition of mulch helps to make the soil more porous. [10] Adding manure and compost can help boost the amount of organic material present in the soil, which in turn helps add essential nutrients. Specifically, adding a 2- to 3-inch layer of compost and manure should be mixed into the soil to match a shovel's depth. [11]