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Compost vs Artificial Fertiliser

PAS 100 compost is a products (not a waste) that can be spread on land with minimal complications from red tape. Unlike compost spread as a waste, there is no deployment needed from the Environment Agency and no Spreading Permit either. Whilst waiting to apply for the paper work from the EA could put you in a better position financially it is a very time consuming process. Compost not only supplies nutrients to soils, it also has the advantage of improving the soils structure, loosening clay soils, and improving water retention in granular soils. The nutrients are also slowly released unlike highly soluble Artificial Fertiliser, which can be washed largely leached (washed) out in just one season.

Below we will attempt to examine the cost of compost when compared with artificial fertilizers.

Compost vs Artificial Fertiliser : Cost Comparison

So compost represents a very cost effective method of improving soil quality, whether you choose a PAS100 or a waste to land route. There are is also a comparison to be made with regards to the nutrient content.

	PAS100 Compost	Compost as Waste	Artificial Fertiliser
Administrative Costs (£)
Spreading Permits	0	EA Fees - 1500 Consultant Fees - 2000	0
Spreading Deployments	0	EA Fees - 800 Consultants Fees / Testing - 1500 (Annual Charge per 50 hectraes)	0

Materials Costs (£)
Cost per Tonne	30	5	260
Application Rates (Tons)
per Hectare	10	10	3

Costs per Hectare (Based on 50 Hectares)	300	130	650

Time Constraints	2 weeks	12 weeks	1 week

Compost vs Artificial Fertiliser : Nutrient Comparison

So although you can see that compost has much lower Nitrogen values weight per weight than artificial fertilisers it has an extremely well balanced variety of macro and micro nutrients that will improve soil quality.

	Compost	Ammoniated superphosphate	Ammonium nitrate limestone
Nutrients (% w/w)
Dry Matter	55	0
Total Nitrogen	1.66	6	20
Total Phosphorus (P)	0.393	20	0
Total Potassium (K)	1.40	0	0
Total Magnesium (Mg)	0.616	0	4
Total Sulphur (S)	0.368	12	0.4
Total Zinc (Zn)	243	0	0
Total Sodium (Na)	0.082	0	0

Other Nutrients (mg/kg)
Total Copper (Cu)	46.3	0	0
Total Zinc (Zn)	243	0	0
Iron (Fe)	22716	0	0
Managanese (Mn)	727	0	0
Boron (B)	28.8	0	0

Compost vs Artificial Fertilisers : Result

Whilst it is obvious that compost has lower quantities of nitrogen weight for weight when compared with artificial fertilisers, it should be bourn in the mind that application rates for compost (tones per hectare) will be higher than their artificial equivalent. Costs for compost are around 20% - 40% of conventional / artificial fertilisers. Compost also improves soil structure and has many important micro nutrients such as boron and manganese.

SWEL help farmers who wish to spread compost on their land, please give us a ring (Exeter Office) if you want to learn more.

The below section was written by a machine.

Technical Dataset: Comparative Analysis of Compost and Artificial Fertilisers

This dataset provides a detailed technical comparison between PAS 100 compost, waste-derived compost, and conventional artificial fertilisers. For agricultural managers and environmental consultants, understanding these variables is essential for optimizing soil health while maintaining strict environmental compliance. The data highlights significant differences in administrative overhead, application economics, and long-term nutrient availability.

Economic and Administrative Data Points

The financial viability of soil conditioners is heavily influenced by the regulatory route chosen. This dataset tracks the following metrics:

Regulatory Costs: Comparison of Environment Agency fees and consultant costs for land spreading permits versus the streamlined route of PAS 100 products.
Operational Efficiency: Data on application rates (tonnes per hectare) and the associated time constraints for securing necessary approvals.
Cost Per Hectare: A consolidated view of total investment requirements, showing that compost typically costs between 20% and 40% of artificial alternatives.

Nutrient Profile and Sustainability Metrics

Beyond simple nitrogen delivery, this dataset explores the broader chemical composition of organic vs. synthetic inputs. This information is vital for developers and farmers working within catchments sensitive to nutrient neutrality and phosphate mitigation.

Macro and Micro-Nutrients: Quantitative analysis of Nitrogen (N), Phosphorus (P), and Potassium (K), alongside essential trace elements like Zinc, Boron, and Manganese.
Leaching Potential: Technical insights into the slow-release nature of compost nutrients compared to the high solubility and leaching risk of ammonium nitrate.
Soil Physicality: Data reflecting the impact of organic matter on water retention in granular soils and structure improvement in heavy clays.

Technical Authority and Application

Utilizing this data allows for more accurate water impact assessments and long-term agricultural planning. By integrating these metrics into a formal planning statement, projects can demonstrate a proactive approach to sustainable land management. With a portfolio of over 900 projects across the UK, SWEL provides the professional accreditation (IES/FGS) and technical authority required to interpret complex nutrient data. Our team ensures that your agricultural strategy is underpinned by robust science and full regulatory alignment.

For additional resources on organic waste standards, please visit our PAS 100 consultants page.