{"id":1080,"date":"2026-07-30T08:36:55","date_gmt":"2026-07-30T08:36:55","guid":{"rendered":"https:\/\/silage-baler.com\/?p=1080"},"modified":"2026-07-30T08:36:55","modified_gmt":"2026-07-30T08:36:55","slug":"silage-carbon-and-soil-health-what-the-research-shows","status":"publish","type":"post","link":"https:\/\/silage-baler.com\/ky\/application\/silage-carbon-and-soil-health-what-the-research-shows\/","title":{"rendered":"Silage, Carbon, and Soil Health: What the Research Shows"},"content":{"rendered":"
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Soil Health \u00b7 Carbon Farming \u00b7 Research<\/div>\n

Silage, Carbon, and Soil Health: What the Research Shows<\/p>\n

The evidence on how silage production \u2014 mowing, baling, and residue management \u2014 interacts with soil carbon, soil biology, and long-term pasture productivity across Australian farming systems.<\/p>\n<\/div>\n<\/div>\n

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Why Silage Producers Are Asking About Carbon<\/h2>\n

Since the establishment of the Australian Carbon Credit Unit (ACCU) market and the expansion of the Emissions Reduction Fund (ERF) into agricultural soil carbon projects from 2019 onwards, Australian dairy and beef producers have been asking a question that was not on anyone’s farming agenda 10 years ago: does the way I manage my silage programme help or hurt my soil carbon credit potential?<\/p>\n

The question is legitimate and the answer is more nuanced than the marketing from some carbon project developers suggests. Silage production \u2014 specifically the act of cutting and removing above-ground biomass from a paddock rather than incorporating it \u2014 does reduce the organic matter input to the soil from that paddock in that season. This is a real carbon dynamic that silage producers should understand honestly rather than having it obscured by optimistic framing. At the same time, the soil carbon story in a well-managed silage system involves compensating factors \u2014 roots left in place, manure returned from silage-fed livestock, improved water infiltration from perennial grass stands, and the soil biology stimulation from regular cutting \u2014 that partially offset the above-ground removal effect.<\/p>\n

This article covers what the Australian and international research actually shows about silage production’s interaction with soil carbon and soil health \u2014 without oversimplification in either direction. For how the baling and wrapping equipment that produces silage fits into the production chain upstream of these soil dynamics, our article on how dairy farmers use round balers to secure year-round silage supply<\/a> covers the production context.<\/p>\n<\/div>\n

\"Australian<\/p>\n

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What the Research Shows: The Carbon Dynamics of Silage Systems<\/h2>\n

Above-Ground Removal: The Real Trade-Off<\/h3>\n

Independent meta-analyses of silage and hay-making systems in temperate agricultural regions \u2014 including studies from CSIRO, the University of Melbourne, and comparable European research \u2014 consistently show that removing above-ground biomass by baling reduces the annual carbon input to the soil by 1.2 to 2.5 tonnes CO\u2082-equivalent per hectare per year compared to an equivalent pasture that is grazed rather than cut. This is the silage system’s primary carbon deficit relative to grazed pastures, and it is real \u2014 not an artefact of measurement methodology.<\/p>\n

The Compensating Factors<\/h3>\n

Three factors partially offset the above-ground removal effect in well-managed silage systems:<\/p>\n

\n\n\n\n\n\n\n\n\n
Factor<\/th>\nCarbon Credit Mechanism<\/th>\nEstimated Offset (tCO\u2082e\/ha\/yr)<\/th>\nConfidence Level<\/th>\n<\/tr>\n<\/thead>\n
Root biomass accumulation<\/td>\nPerennial grass roots deposit 40\u201360% of plant carbon below ground regardless of cutting<\/td>\n0.5\u20131.2<\/td>\nHigh \u2014 well documented<\/td>\n<\/tr>\n
Manure return from silage-fed stock<\/td>\nSilage fed to stock generates manure returned to paddocks \u2014 25\u201335% of carbon ingested is excreted<\/td>\n0.3\u20130.8<\/td>\nMedium \u2014 depends on return rate<\/td>\n<\/tr>\n
Improved soil moisture from perennial cover<\/td>\nPerennial silage stands maintain better soil structure and water infiltration than annual crop rotations<\/td>\n0.1\u20130.4<\/td>\nMedium \u2014 site-specific<\/td>\n<\/tr>\n
Reduced tillage under silage stands<\/td>\nEstablished silage pastures require no annual cultivation \u2014 reducing tillage-related carbon loss<\/td>\n0.2\u20130.6<\/td>\nMedium<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

The net effect: a well-managed silage system that returns manure from silage-fed stock to the silage paddock, maintains perennial grass stands without tillage, and cuts at flag-leaf rather than post-seed stage (maximising root biomass relative to above-ground material) has a carbon deficit relative to grazed pasture of approximately 0.5 to 1.2 tCO\u2082e per hectare per year \u2014 significantly smaller than the gross above-ground removal figure suggests.<\/p>\n

Where Silage Systems Are Carbon-Positive<\/h3>\n

In two specific scenarios, silage production systems have been shown to achieve net positive soil carbon outcomes relative to comparable land use alternatives: (1) conversion from annual cropping to perennial grass silage, where the perennial root system accumulates carbon faster than the annual crop rotation it replaces; and (2) integration of silage paddocks into intensive rotational grazing systems where the silage cut replaces a grazing rotation that would otherwise have over-grazed root reserves during a dry period. In both cases, the soil carbon gain from improved root system management exceeds the carbon loss from above-ground biomass removal.<\/p>\n<\/div>\n

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Soil Biology: What Cutting Does to the Microbial Community<\/h2>\n

The Short-Term Disruption and the Longer-Term Response<\/h3>\n

Each silage cut \u2014 particularly if followed immediately by raking and baling without a post-cut rest period \u2014 temporarily reduces the photosynthetically active leaf area and slows the flow of root exudates (sugars, amino acids, and organic acids) that feed soil microbial communities. This post-cut reduction in root exudate supply causes a measurable short-term (7 to 14 day) decline in soil microbial activity measured by CO\u2082 respiration and enzyme activity. The decline reverses as the pasture regrows and resumes exudate production \u2014 typically within 14 to 21 days in actively growing temperate grass stands.<\/p>\n

The key soil biology management implication: post-cut rest periods of at least 21 days before the next grazing or cutting event allow soil microbial communities to recover their activity levels between harvest events. Silage operations that cut at 21 to 28-day intervals without any grazing rest in between \u2014 common in high-productivity irrigated dairy systems \u2014 show consistently lower soil biological activity than systems with 35 to 42-day rest intervals. This soil biology trade-off is worth factoring into the decision about optimal cut frequency in high-intensity silage systems.<\/p>\n

Cover Crops and Silage: A Soil Health Combination<\/h3>\n

The most consistently positive soil health outcome from silage-producing operations comes from integrating cover crops into the rotation. A winter cereal-vetch cover crop baled as silage before the summer cash crop builds soil biology through the diverse root system it establishes in the 10 to 14-week growth period before baling \u2014 even when the above-ground material is completely removed. This represents a genuine both-and outcome: feed value captured by baling, soil biology benefit delivered by root systems that remain and decompose after baling. For farms combining cropping and livestock, the cover crop silage approach is the strongest available strategy for maintaining soil health while building feed reserves.<\/p>\n<\/div>\n

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Silage and Carbon Credit Eligibility in Australia<\/h2>\n

The Australian Soil Carbon Method: What Silage Producers Need to Know<\/h3>\n

The Australian Carbon Credit Unit (ACCU) soil carbon method (Measurement of Soil Carbon Sequestration in Agricultural Systems, Version 1.2) allows landholders to earn carbon credits for increases in soil organic carbon measured through before-and-after soil sampling. Silage producers can participate if: they change their management in a way that is expected to increase soil carbon (e.g., converting from annual cropping to perennial grass silage, adopting minimum-tillage silage establishment, or increasing manure return rates to silage paddocks), they commit to the management change for a minimum 25-year permanence period, and they engage an eligible project developer who manages the measurement and verification process.<\/p>\n

Silage-only operations that continue existing management without a documented management change do not qualify for carbon credit payments \u2014 the ACCU scheme requires a measurable transition from a baseline, not a continuation of existing practice. The scheme is financially viable for operations making significant land use changes; it is not a passive income stream for existing well-managed silage systems.<\/p>\n

The 9YCM-850 bundling film wrapping machine<\/a> and the broader EverPower baling range do not in themselves qualify as eligible management changes for carbon credit purposes \u2014 they are production tools, not soil management interventions. The management decisions upstream of the baler (cover crop integration, perennial establishment, reduced tillage, manure return programmes) are the carbon-relevant variables.<\/p>\n<\/div>\n

\"9YCM-850<\/p>\n

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Frequently Asked Questions<\/h2>\n
\nDoes making silage reduce my farm’s overall carbon footprint?<\/span>+<\/span><\/summary>\n
It depends on what silage replaces. If silage production replaces purchased feed (transported grain or hay with embedded transport emissions), on-farm silage has a clear net carbon advantage. If silage production is additional to existing feed use and the extra feed enables higher stocking rates with proportionally more cattle methane emissions, the net carbon outcome depends on the production efficiency gain relative to the additional enteric methane. The most carbon-efficient outcome from silage production is replacing high-emission-intensity purchased feed with low-emission-intensity on-farm silage from established perennial pastures.<\/div>\n<\/details>\n
\nCan I include my silage paddocks in a soil carbon credit project?<\/span>+<\/span><\/summary>\n
Paddocks under perennial grass silage production can be included in soil carbon measurement projects if a qualifying management change is made in those paddocks during the project crediting period. Examples of qualifying changes: converting from annual cultivation to perennial grass establishment, adopting organic fertiliser (manure) in place of synthetic fertiliser, or implementing minimum-tillage sod-seeding of legumes into existing grass stands. Continuing existing silage management without a qualifying change does not generate baseline-relative carbon credits.<\/div>\n<\/details>\n
\nDoes the frequency of silage cuts affect soil carbon?<\/span>+<\/span><\/summary>\n
Yes \u2014 cut frequency is one of the management variables most strongly associated with soil carbon outcomes in intensively managed silage systems. Systems cutting at 21-day intervals (5+ cuts per season) show lower soil organic carbon accumulation rates than systems cutting at 35 to 42-day intervals (3 to 4 cuts per season), primarily because shorter intervals reduce root biomass accumulation between cuts. For soil carbon purposes, the 3 to 4 cut system with adequate inter-cut rest periods is preferable to 5+ cut systems at equivalent annual yield \u2014 provided the fewer cuts produce equivalent total DM yield through higher per-cut biomass.<\/div>\n<\/details>\n
\nIs organic matter lost from silage effluent a concern for Australian silage producers?<\/span>+<\/span><\/summary>\n
Silage effluent \u2014 the liquid that drains from silage bales in the first 3 to 7 days post-wrapping, particularly from high-moisture baleage \u2014 contains soluble sugars, organic acids, and minerals that represent real organic matter loss from the silage system. In temperate regions with concrete effluent collection systems (common on European farms), this effluent is captured and spread on paddocks. In Australian round bale silage systems, effluent soaks into the storage pad or surrounding soil \u2014 a minor pathway of organic matter return to the soil. Reducing effluent loss by targeting baling moisture above 40% DM (below 60% moisture) reduces both the quality loss from silage and the soil drainage issue from concentrated acidic effluent on storage pads.<\/div>\n<\/details>\n
\nWhat farming practices best combine silage production with soil carbon building?<\/span>+<\/span><\/summary>\n
The three management practices with the strongest research support for combining silage production with soil carbon building in Australian conditions are: (1) cover crop silage \u2014 baling winter covers before summer cash crops, capturing feed value while building root carbon; (2) perennial grass establishment \u2014 converting from annual hay crops to perennial ryegrass or phalaris silage systems that accumulate root carbon over multiple seasons; (3) manure recycling \u2014 actively returning the manure from silage-fed livestock to silage paddocks as the primary fertiliser, closing the organic matter loop. Each of these practices is independently beneficial for soil health and when combined they make silage production compatible with net-positive soil carbon management.<\/div>\n<\/details>\n<\/div>\n

\"9YG-1.25<\/p>\n

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EverPower Baling Machinery \u00b7 Condell Park NSW 2200<\/div>\n

Discuss Silage Production in the Context of Your Farm’s Sustainability Goals<\/h2>\n

Tell us about your land use, current silage system, and any carbon farming interest \u2014 we’ll share the production context and equipment that supports both productivity and soil health objectives.<\/p>\n

Request a Quote<\/a> About EverPower<\/a><\/div>\n
+61 2 9708 3322<\/a>  |  \u2709 sales@silage-baler.com<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Soil Health \u00b7 Carbon Farming \u00b7 Research Silage, Carbon, and Soil Health: What the Research Shows The evidence on how silage production \u2014 mowing, baling, and residue management \u2014 interacts with soil carbon, soil biology, and long-term pasture productivity across Australian farming systems. Why Silage Producers Are Asking About Carbon Since the establishment of the […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-1080","post","type-post","status-publish","format-standard","hentry","category-applications"],"_links":{"self":[{"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/posts\/1080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/comments?post=1080"}],"version-history":[{"count":1,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/posts\/1080\/revisions"}],"predecessor-version":[{"id":1088,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/posts\/1080\/revisions\/1088"}],"wp:attachment":[{"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/media?parent=1080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/categories?post=1080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/silage-baler.com\/ky\/wp-json\/wp\/v2\/tags?post=1080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}