Enhanced Efficiency Phosphorus Fertilizers (EEPFs) - Sustainable Phosphorus Alliance

Agronomic, Environmental, and Economic Impacts Across the Agricultural Value Chain

by Steve Levitsky, Chief Administrative & Sustainability Officer, Phospholutions

Executive Summary

Phosphorus (P) is an essential, nonrenewable nutrient that underpins global agricultural productivity. Conventional phosphorus fertilizers can be used inefficiently when crop uptake, soil fixation, runoff, and long-term soil accumulation are not well managed. Unrecovered phosphorus can become chemically fixed in soils or be transported in runoff, contributing to eutrophication and long-term water-quality impacts (Syers, Johnston, and Curtin, 2008).

Enhanced Efficiency Phosphorus Fertilizers (EEPFs)—including controlled-release, coated, chemically modified, fixation-inhibitor, blended, multifunctional, and synergistic phosphate fertilizers—are intended to address this inefficiency. The literature supports their potential to improve phosphorus availability, agronomic efficiency, and crop performance in selected systems; results remain product-, soil-, crop-, and management-specific (Guelfi et al., 2022).

At a watershed scale, nutrient-reduction efforts that include improved phosphorus management have been linked to sizable economic gains. In the Chesapeake Bay region, Phillips and McGee (2016) estimated that achieving nutrient and sediment reduction targets would generate $22.5 billion per year in net economic benefits relative to then-current conditions, with estimated benefits of $28.2 billion per year under a business-as-usual comparison.

Background: The Phosphorus Efficiency Challenge

Phosphorus inefficiency in agricultural systems is generally driven by a few well‑understood mechanisms:

rapid dissolution of soluble phosphate fertilizers that exceeds short‑term crop demand
strong chemical fixation of phosphate ions to soil minerals
transport of dissolved and particulate phosphorus into surface and subsurface waters

Global assessments note that phosphorus is both a finite resource and a major contributor to eutrophication when mismanaged, increasing environmental costs and long-term sustainability concerns (Syers, Johnston, and Curtin, 2008).

Enhanced Efficiency Phosphorus Fertilizers aim to slow nutrient release, reduce soil-P fixation, and better match phosphorus availability with crop uptake, improving overall phosphorus use efficiency under appropriate conditions (Guelfi et al., 2022; Bruulsema, Peterson, and Prochnow, 2019).

Benefits to Farmers

Improved Phosphorus Use Efficiency and Yield Stability

Across published studies, EEPFs are commonly reported to:

improve phosphorus availability or apparent phosphorus use efficiency under some conditions,
maintain yield at reduced phosphorus rates in selected systems, and
support early crop development where phosphorus supply is limiting.

Review and experimental literature supports a conditional efficiency benefit. Guelfi et al. (2022) conclude that innovative phosphate technologies may improve agronomic efficiency by reducing fixation and modifying release dynamics. Chen et al. (2021) reported higher maize yield and phosphorus-use efficiency when coated diammonium phosphate was combined with humic acid in that study system. These results are encouraging, but they do not justify a blanket assumption of superior performance across all crops, soils, climates, placements, and fertilizer programs.

EEPFs may also improve yield stability where conventional soluble phosphorus sources are more vulnerable to fixation or loss, but this remains a context‑dependent outcome that should be validated with local field data.

Evidence on Farm-level Returns and Economic Potential

Enhanced-efficiency phosphorus fertilizers create farmer value by improving the odds that applied phosphorus stays available to the crop during the period when it is needed most. The economic return comes from three practical pathways: higher yield on phosphorus-responsive acres, maintained yield with more efficient phosphorus use, and reduced exposure to nutrient loss where soluble phosphorus is vulnerable to fixation or runoff. Peer-reviewed and industry-backed evidence shows that these technologies can deliver measurable yield and phosphorus-efficiency gains when matched to the right soil, crop, and management conditions.

Peer-reviewed meta-analysis — AVAIL phosphorus enhancer: Hopkins et al. analyzed 503 field evaluations and reported a statistically significant average yield increase of 2.1% across all observations, increasing to 4.6% in sites more likely to respond based on soil-test phosphorus, phosphorus rate, and pH conditions that influence phosphorus availability. For a farmer, that yield response is the core ROI driver: Even modest percentage gains can produce attractive net returns when the added crop value exceeds the product premium.
Peer-reviewed field studies — Policote-coated MAP: Pelá et al. reported higher soybean and maize yields and higher agronomic phosphorus-use efficiency from Policote-coated MAP than from conventional MAP in Brazilian tropical soils. Zanão Jr. et al. likewise reported higher soybean and corn yields across seasons and locations with coated phosphorus fertilizer compared with conventional phosphorus fertilizer. These studies support a clear economic message: Where phosphorus fixation limits crop access to applied fertilizer, enhanced-efficiency phosphorus can convert more of the fertilizer investment into harvested yield.
ROI calculation standard: Farmer ROI should be presented in straightforward economic terms: Net return per acre equals additional yield revenue plus any fertilizer savings, minus the incremental cost of the enhanced-efficiency product. ROI percentage equals net return divided by incremental product cost. This gives growers, retailers, and policymakers a transparent way to translate field response into dollars per acre.

Example ROI translation using corn prices. A practical way to express farmer ROI is to convert agronomic response into dollars per acre. For example, if corn is valued at $4.50/bu, a 2–5 bu/ac yield response is worth $9.00–$22.50/ac in added gross revenue before accounting for the product premium. If the same program also allows a grower to maintain yield with a lower phosphorus rate, the reduced input cost can be added to the yield-response value. In this framework, ROI increases as crop price, yield response, or input-cost savings increase relative to the incremental cost of the enhanced-efficiency fertilizer.

The farmer ROI message is direct: Enhanced-efficiency phosphorus fertilizers can pay when they are deployed on acres where phosphorus availability constrains crop performance. The published evidence shows measurable yield and phosphorus-efficiency gains in responsive systems, and the economic value is captured through additional bushels, improved fertilizer productivity, and better alignment of nutrient supply with crop demand.

Benefits to Agricultural Businesses

Product Differentiation and Value Creation

For fertilizer manufacturers and distributors, EEPFs can support:

shifting from commodity pricing to technology‑based value propositions,
bundling products with agronomic services and nutrient stewardship programs, and
maintaining margins under increasing regulatory and environmental pressure.

From a business perspective, phosphate technologies that improve nutrient efficiency or reduce loss pathways can support product differentiation, especially when paired with stewardship recommendations, technical support, and field data that clarify where the product outperforms standard programs (Guelfi et al., 2022; Bruulsema, Peterson, and Prochnow, 2019).

Risk Reduction and Regulatory Positioning

Peer-reviewed studies indicate that some less soluble or coated phosphate fertilizers can reduce phosphorus release to runoff relative to more soluble conventional sources. That does not by itself prove regulatory advantage in every market, but it provides a technically relevant basis for stewardship claims and for positioning products in watersheds where dissolved phosphorus loss is under scrutiny (da Silva et al., 2021).

In practice, the commercial relevance will depend on whether regulators, processors, or downstream buyers value documented runoff‑risk reduction and whether suppliers can substantiate that value with product‑specific data.

Environmental Benefits

Reduced Runoff, Leaching, and Eutrophication

Phosphorus losses are a well-documented contributor to harmful algal blooms and freshwater and estuarine hypoxia. Laboratory, greenhouse, and field-linked studies indicate that slower phosphorus release is often associated with lower runoff loss potential relative to more soluble sources (da Silva et al., 2021).

Soil Health and Resource Conservation

Improved phosphorus efficiency:

can reduce unnecessary long‑term soil phosphorus accumulation when matched to crop demand,
may help limit future legacy phosphorus risk by avoiding repeated overapplication, and
supports more efficient use of a finite phosphate resource.

Long-term phosphorus management that avoids unnecessary accumulation of labile soil phosphorus can help reduce the risk of future dissolved phosphorus transport from agricultural land (Nash et al., 2025; da Silva et al., 2021).

Broader Economic Impacts: Clean Water and Regional Prosperity

Economic Costs of Nutrient Pollution

Nutrient pollution imposes substantial economic costs through:

drinking water treatment and infrastructure investment,
loss of commercial and recreational fisheries,
tourism and recreation losses, and
public health impacts from harmful algal blooms.

Reducing nutrient pollution therefore yields benefits well beyond agriculture itself.

Chesapeake Bay: Empirical Evidence of Large Economic Returns

The Chesapeake Bay provides the strongest quantified example of nutrient reduction delivering major economic gains.

A peer-reviewed economic valuation published in Coastal Management estimated that achieving nutrient and sediment reduction targets under the Chesapeake Bay Total Maximum Daily Load (TMDL) would generate $22.5 billion per year (2013 USD) in net economic benefits, rising to $28.2 billion per year under a business-as-usual comparison (Phillips and McGee, 2016).

These benefits include gains from:

improved commercial fisheries and seafood production,
increased recreation and tourism,
reduced drinking water treatment costs,
flood protection and storm resilience, and
higher property values and ecosystem services.

Chesapeake Bay Foundation materials summarizing the valuation place annual implementation costs for the Chesapeake Clean Water Blueprint in the range of about $5–6 billion, implying a rough 4:1 to 5:1 benefit-to-cost ratio when paired with the valuation above (Chesapeake Bay Foundation, 2014; Phillips and McGee, 2016).

Relevance to Agricultural Phosphorus Management

Agriculture is a major controllable source of phosphorus entering the Chesapeake Bay and similar watersheds. Technologies that reduce dissolved reactive phosphorus losses at the field level are therefore essential for capturing these regional economic benefits.

EEPFs are one possible contributor to this objective because formulations that lower dissolved phosphorus runoff risk may complement other nutrient-management practices within broader watershed strategies (da Silva et al., 2021; Bruulsema, Peterson, and Prochnow, 2019).

Evidence Beyond Chesapeake Bay

Comparable patterns can occur beyond Chesapeake Bay: Nutrient reduction and water-quality restoration can generate economic benefits through recreation, fisheries, drinking water, and ecosystem services, but the magnitude and timing of those benefits are highly place specific (Phillips and McGee, 2016).

Reduced nutrient loading can improve fisheries and recreation outcomes where eutrophication has impaired water quality.
Water‑quality improvements can also increase the value of ecosystem services such as water supply, flood regulation, and aesthetics.

Conclusions

Overall, the literature suggests that Enhanced Efficiency Phosphorus Fertilizers can:

improve farm performance in some systems through higher phosphorus efficiency, maintained yield, or lower loss risk;
create agribusiness value when supported by stewardship, technical validation, and market need;
reduce phosphorus loss potential in selected formulations and use cases; and
contribute to broader water‑quality benefits when adopted as part of larger nutrient‑management systems.

Taken together, the literature points to a practical opportunity: Improving phosphorus efficiency can support on‑farm performance while also advancing broader water‑quality goals. The strength of the economic case depends on local agronomic response, input pricing, and the scale at which water‑quality improvements are realized.

Evidence limitations. This white paper identifies a credible directional case for enhanced efficiency phosphorus fertilizers, but the published evidence base remains heterogeneous. Results vary by product chemistry, crop, soil, climate, placement, and comparison treatment, and relatively few studies publish standardized farm budgets or directly comparable ROI metrics. For that reason, product claims should rely on named trial data and transparent assumptions rather than generalized return figures.

References

Syers, J.K.; Johnston, A.E.; Curtin, D. (2008). Efficiency of Soil and Fertilizer Phosphorus Use: Reconciling Changing Concepts of Soil Phosphorus Behaviour with Agronomic Information. FAO Fertilizer and Plant Nutrition Bulletin 18. Supports claims that phosphorus is a finite, nonrenewable resource; fertilizer phosphorus efficiency depends on soil and management; and phosphorus transfer from soils contributes to eutrophication.
Guelfi, D.; Nunes, A.P.P.; Sarkis, L.F.; Oliveira, D.P. (2022). “Innovative Phosphate Fertilizer Technologies to Improve Phosphorus Use Efficiency in Agriculture.” Sustainability 14(21):14266. DOI: 10.3390/su142114266. Supports general statements that enhanced-efficiency phosphate technologies include fixation inhibitors, chemically modified fertilizers, controlled-release products, blends, multifunctional fertilizers, and synergistic phosphate fertilizers, and that these technologies are intended to improve agronomic efficiency relative to conventional phosphate fertilizers.
da Silva, R.C.; Degryse, F.; Baird, R.; Mallarino, A.P.; McLaughlin, M.J. (2021). “Screening fertilizers for their phosphorus runoff risk using laboratory methods.” Journal of Environmental Quality 50(4):955–966. DOI: 10.1002/jeq2.20236. Supports claims that less soluble or coated phosphorus fertilizer formulations are being evaluated to reduce phosphorus runoff risk and that laboratory phosphorus-release methods correlated strongly with runoff results from rainfall simulators.
Bruulsema, T.W.; Peterson, H.M.; Prochnow, L.I. (2019). “The Science of 4R Nutrient Stewardship for Phosphorus Management across Latitudes.” Journal of Environmental Quality 48:1295–1299. DOI: 10.2134/jeq2019.02.0065. Supports 4R stewardship framing, including right source, rate, time, and place; phosphorus resource efficiency; water-quality risk reduction; recycling; soil health; and value-chain engagement.
Phillips, S.; McGee, B. (2016). “Ecosystem Service Benefits of a Cleaner Chesapeake Bay.” Coastal Management 44(3):241–258. DOI: 10.1080/08920753.2016.1160205. Supports the Chesapeake Bay TMDL economic-benefit estimates of $22.5 billion per year over then-current conditions and $28.2 billion per year relative to business-as-usual, in 2013 dollars.
Chesapeake Bay Foundation (2014). The Economic Benefits of Cleaning Up the Chesapeake. Useful as an advocacy/technical report summarizing the Chesapeake valuation, but the peer-reviewed Phillips and McGee (2016) article should be the primary citation for the $22.5 billion and $28.2 billion estimates.
Nash, D.M.; McDowell, R.W.; Kleinman, P.J.A.; Moore, P.A. Jr.; Duncan, J.M.; Haygarth, P.M.; Smith, D.R.; Iho, A. (2025). “A conceptual model for dissolved P mobilization from legacy sources.” Journal of Environmental Quality 54(2):303–318. DOI: 10.1002/jeq2.70003. Supports statements on dissolved phosphorus mobilization from legacy phosphorus sources and the need for improved phosphorus-risk tools, but it does not directly validate enhanced-efficiency fertilizer performance.
Hopkins, B.G.; Fernelius, K.J.; Hansen, N.C.; Eggett, D.L. (2018). “AVAIL Phosphorus Fertilizer Enhancer: Meta-Analysis of 503 Field Evaluations.” Agronomy Journal. DOI: 10.2134/agronj2017.07.0385. Supports the farmer ROI discussion by documenting a statistically significant average yield increase of 2.1% across all observations and larger responses under phosphorus-responsive conditions; ROI must still be calculated from local yield value and product cost.
Pelá, A.; Bento, R.U.; Crispim, L.B.R.; Reis Jr., R.A. (2019). “Enhanced efficiency of phosphorus fertilizer in soybean and maize.” Australian Journal of Crop Science 13(10):1638–1642. DOI: 10.21475/ajcs.19.13.10.p1853. Supports claims that Policote-coated MAP increased soybean and maize yields and agronomic phosphorus-use efficiency relative to conventional MAP in the studied tropical soils.
Verified — Zanão Jr., L.A.; Arf, O.; Reis Jr., R.A.; Pereira, N. (2020). “Phosphorus fertilization with enhanced efficiency in soybean and corn crops.” Australian Journal of Crop Science 14(01):78–84. DOI: 10.21475/ajcs.20.14.01.p1862. Supports claims that coated phosphorus fertilizer increased soybean and corn yields and agronomic phosphorus-use efficiency across seasons and sites.

Tables: Empirical Evidence Supporting Enhanced Efficiency Phosphorus Fertilizers

Table 1: Comparison of Conventional vs. Enhanced Efficiency Phosphorus Fertilizers

Comparison of Conventional vs. Enhanced Efficiency Phosphorus Fertilizers Attribute	Conventional P Fertilizers (MAP/DAP)	Enhanced Efficiency P Fertilizers
Typical first-year crop P recovery	Often limited by rapid dissolution and soil fixation	Can be improved under some soils and management systems, depending on formulation
Release pattern	Rapid dissolution	Controlled or delayed releaseControlled, delayed, or modified release depending on technology
Soil fixation risk	Can be high in reactive soils	May be reduced through coatings, chemical modification, or fixation inhibitors
Runoff risk during storm events	Higher dissolved P release risk for highly soluble sources	Lower dissolved P release risk has been reported for some less soluble or coated sources
Management fit	Performance strongly shaped by rate, timing, and placement	Most effective when paired with field validation and stewardship-based placement
Economic outcome	Usually lower product cost, but may be less efficient in challenging soils	Value depends on whether efficiency gains offset product premium under local conditions

Sources: Syers, Johnston, and Curtin (FAO, 2008); Guelfi et al. (2022); da Silva et al. (2021); Bruulsema et al. (2019)

Table 2. Farmer ROI Evidence for Enhanced-efficiency Phosphorus Fertilizers

Evidence Source	Reported Farmer-relevant Result	ROI Translation
Hopkins et al. meta-analysis of AVAIL phosphorus enhancer; 503 field evaluations	Average yield response of 2.1% across all observations and 4.6% under more phosphorus-responsive conditions	Demonstrates that modest average yield gains can generate farmer ROI when the value of added production exceeds the product premium
Pelá et al. 2019; Policote-coated MAP in soybean and maize	Higher soybean and maize yields and higher agronomic phosphorus-use efficiency than conventional MAP in tropical soils	Shows yield and phosphorus-efficiency gains that support positive net returns in phosphorus-fixing soils
Zanão Jr. et al. 2020; Policote-coated phosphorus fertilizer across soybean and corn seasons/locations	Higher soybean and corn yields and higher agronomic phosphorus-use efficiency than conventional phosphorus fertilizer	Supports farmer value through higher crop output and better conversion of applied phosphorus into yield

Illustrative corn-price calculation: At $4.50/bu corn, a 2–5 bu/ac yield response equals $9.00–$22.50/ac in added gross revenue before subtracting the incremental product cost. Reduced phosphorus rate or avoided input waste can increase net return further when yield is maintained.

Sources: Hopkins et al. (2018); Pelá et al. (2019); Zanão Jr. et al. (2020).

Table 3. Watershed-Scale Economic Benefits of Nutrient Reduction

Watershed / System	Intervention	Estimated Annual Economic Benefit
Chesapeake Bay	Nitrogen, phosphorus, and sediment load reductions under the TMDL	$22.5B per year (2013 USD) relative to then-current conditions
Chesapeake Bay (business-as-usual comparison)	Avoided future degradation plus restoration benefits	$$28.2B per year (2013 USD)
Other eutrophic watersheds	Nutrient reduction and water-quality restoration efforts	Benefits can accrue across fisheries, recreation, water supply, and other ecosystem services, but values are context specific

Sources: Phillips and McGee (2016); Chesapeake Bay Foundation (2014)

Opinions expressed here do not necessarily reflect those of the Sustainable Phosphorus Alliance or its members.