{"id":865,"date":"2026-05-15T07:24:44","date_gmt":"2026-05-15T07:24:44","guid":{"rendered":"https:\/\/foragebaler.com\/?p=865"},"modified":"2026-05-15T07:24:44","modified_gmt":"2026-05-15T07:24:44","slug":"alfalfa-cutting-frequency-stand-life-vs-yield-trade-offs","status":"publish","type":"post","link":"https:\/\/foragebaler.com\/zh\/alfalfa-cutting-frequency-stand-life-vs-yield-trade-offs\/","title":{"rendered":"Alfalfa Cutting Frequency: Stand Life vs Yield Trade-offs"},"content":{"rendered":"
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<\/div>\n
Alfalfa Stand Management Guide<\/span><\/p>\n

Alfalfa Cutting Frequency: Stand Life vs Yield Trade-offs<\/h1>\n

Every cut you take from an alfalfa stand is a transaction \u2014 you receive a check of high-quality feed while the plant draws down its root carbohydrate reserves to fund the recovery. Cut too often and those reserves are never fully replenished. Cut at the wrong time in the fall and the plant enters winter without the stored energy to survive cold or power the aggressive spring growth you count on. Cutting frequency is the single management decision that most determines how long an alfalfa stand remains productive.<\/p>\n

Cutting Frequency Guide<\/a><\/p>\n<\/div>\n<\/div>\n

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Root Carbohydrates: The Biology Behind Every Cutting Decision<\/h2>\n

Alfalfa is a perennial plant that survives between cuttings by drawing on non-structural carbohydrates (NSC) stored in its taproot and crown. After a cutting removes the shoot mass, the plant must regrow entirely from these stored reserves \u2014 photosynthesis does not meaningfully contribute to the recovery until the canopy is reestablished and above about 6 inches in height. The amount of stored NSC in the root at the time of each cutting determines how fast the regrowth happens, how vigorous the recovered stand is, and whether the plant has adequate reserves to survive the winter.<\/p>\n

Research by land-grant universities in major alfalfa production states consistently shows that root NSC concentration follows a predictable cycle: it drops sharply in the first 14\u201321 days after each cutting as the plant funds regrowth from reserves; it begins rising after canopy closure as photosynthesis generates carbohydrate surplus; it peaks at or just past the late-bud-to-first-bloom stage; and it begins declining again as flowering and seed development redirect carbohydrates away from root storage. This cycle defines the safest cutting interval \u2014 cutting before the NSC has had adequate time to recover after the previous cut puts the stand at risk.<\/p>\n

The observable proxy for NSC recovery:<\/strong> Because root carbohydrates cannot be measured without destructive sampling, producers use a visible surface indicator \u2014 the emergence of new shoots from the crown and the appearance of regrowth at the plant base. When you see active regrowth shoots 2\u20133 inches tall across the majority of plants in the stand at the cutting interval you are targeting, root NSC has begun its recovery. Cutting before this regrowth appears sacrifices both yield and stand longevity.<\/div>\n<\/div>\n
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Cutting Intervals by Region: How Many Days Between Cuts<\/h2>\n

\"hay<\/p>\n

The number of days required between cuttings for adequate root NSC recovery is not fixed \u2014 it is governed by growing degree days (the heat accumulation that drives plant metabolism). In warm weather (average daily temperatures 75\u201385\u00b0F), alfalfa grows rapidly and recovers faster; the interval may be as short as 25\u201328 days. In cool weather (50\u201365\u00b0F average), the same biological threshold is reached in 35\u201345 days. Region and season both matter.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u5730\u533a<\/th>\nTypical cuttings\/year<\/th>\nSummer interval (days)<\/th>\nSpring\/fall interval (days)<\/th>\n\u7b14\u8bb0<\/th>\n<\/tr>\n<\/thead>\n
Desert Southwest (AZ, NV, CA desert)<\/td>\n7\u201312<\/td>\n21\u201326<\/td>\n28\u201335<\/td>\nYear-round production possible; short dormancy or none; very high total yield per acre per year possible with irrigation<\/td>\n<\/tr>\n
Mountain West irrigated (ID, UT, WY)<\/td>\n4-6<\/td>\n28\u201332<\/td>\n35\u201345<\/td>\nHigh altitude limits season length; frost risk constrains fall cut timing; premium quality from cool nights<\/td>\n<\/tr>\n
Upper Midwest (MN, WI, IA, IL)<\/td>\n3\u20134<\/td>\n30\u201335<\/td>\n40\u201350<\/td>\nShorter growing season; 3 cuttings is standard; 4th cutting possible in favorable years with early spring start<\/td>\n<\/tr>\n
Pacific Northwest (OR, WA, N CA)<\/td>\n4-6<\/td>\n28\u201333<\/td>\n35\u201345<\/td>\nWinter wet conditions constrain field operations; export market drives quality-first cutting management<\/td>\n<\/tr>\n
Southeast \/ Mid-Atlantic (VA, TN, NC)<\/td>\n4\u20135<\/td>\n28\u201333<\/td>\n35\u201342<\/td>\nSummer heat and humidity require attention to stand stress; disease pressure higher at tight cutting intervals<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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The Quality vs. Stand Life Trade-off: What the Data Shows<\/h2>\n

The central tension in alfalfa cutting management is that the highest-quality hay is cut at pre-bud to first-bloom stage \u2014 the same time when root NSC is approaching (but has not yet fully reached) its peak. Cutting slightly later produces lower-quality hay but gives the plant more time for complete root carbohydrate restoration. This trade-off is real and cannot be eliminated \u2014 it can only be managed intentionally.<\/p>\n

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Quality-First Management<\/div>\n

Cut timing:<\/strong> Pre-bud to 10% bloom (highest RFV, highest CP)<\/p>\n

Interval:<\/strong> 28\u201332 days in summer; as short as biology allows<\/p>\n

Stand life impact:<\/strong> Stands cut consistently at first-bloom or earlier show 15\u201325% higher annual thinning rates than stands cut at mid-bloom. Expect a 5\u20137 year productive stand life vs. 8\u201310 years under less aggressive management.<\/p>\n

Best for: dairy direct, Japan\/Korea export, premium horse hay \u2014 markets that pay $25+\/ton quality premium<\/div>\n<\/div>\n
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Stand Longevity Management<\/div>\n

Cut timing:<\/strong> 25\u201350% bloom (moderate RFV, longer root recovery)<\/p>\n

Interval:<\/strong> 35\u201342 days in summer; longer spring and fall intervals<\/p>\n

Stand life impact:<\/strong> Stands cut at this maturity maintain full production density for 9\u201312 years in favorable soil conditions. Higher per-cut yield partially offsets the lower per-unit quality.<\/p>\n

Best for: beef\/cow-calf operations, biomass buyers, dryland operations where stand replacement cost is high<\/div>\n<\/div>\n<\/div>\n

The calculation that determines which approach is right for your operation: multiply the quality premium per ton by annual tonnage to get the annual premium value of quality-first management, then subtract the estimated stand replacement cost prorated over the shortened stand life. If quality premium \u00d7 annual tons > stand replacement cost \u00f7 years of stand life reduction, quality-first management is financially justified. Most irrigated alfalfa operations selling to premium markets find quality-first management strongly justified on this basis.<\/p>\n<\/div>\n

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The Fall Dormancy Cut: The Single Most Stand-Critical Decision of the Year<\/h2>\n

The timing of the last cutting before winter dormancy \u2014 the fall cut \u2014 is more consequential for stand persistence than all summer cutting decisions combined. A fall cut taken at the wrong time leaves the plant without adequate root carbohydrate reserves to survive winter or produce aggressive spring growth. University research across multiple states consistently identifies fall cutting timing as the leading cause of winter-injured and prematurely thinned alfalfa stands.<\/p>\n

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The Danger Period<\/div>\n

Cuttings taken 4\u20136 weeks before the killing frost date (the period when root NSC is depleted but regrowth cannot complete before cold) create the worst possible carbohydrate deficit going into winter. The plant uses reserves to initiate regrowth, but temperatures drop before photosynthesis can repay the debt. In northern states, this danger window is typically September 1 \u2013 October 15 depending on local frost dates.<\/p>\n<\/div>\n

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Safe Options<\/div>\n

Cut early:<\/strong> Take the last cutting at least 6 weeks before the expected killing frost date. This allows 6 weeks of growth and photosynthesis to replenish root NSC before dormancy. The stand enters winter with full reserves. Cut late:<\/strong> Take the last cutting after the first killing frost, when the plant has already entered dormancy. Mechanical cutting at this stage does not trigger regrowth; the plant is dormant and will resume in spring with full reserves. Both approaches are safe; the 4\u20136 week window between them is the danger zone.<\/p>\n<\/div>\n

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Variety Matters<\/div>\n

Dormancy rating of the alfalfa variety determines how early it naturally enters dormancy in fall. Highly dormant varieties (dormancy rating 2\u20133) enter dormancy earlier and are less sensitive to fall cut timing; semi-dormant to non-dormant varieties (rating 6\u201310) remain actively growing later and are more vulnerable to poorly timed fall cuttings. Match fall cutting management to your variety’s dormancy rating, not to a calendar date alone.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Signs That Cutting Frequency Is Shortening Your Stand Life<\/h2>\n

\"hay<\/p>\n

Because root carbohydrate depletion is invisible until the plant shows symptoms, the warning signs of excessive cutting frequency are often attributed to the wrong cause (disease, soil, variety) when frequency is the actual driver. These are the observable signals of a stand under carbohydrate stress from over-cutting:<\/p>\n

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Slow regrowth after cutting<\/div>\n

A healthy stand with adequate root reserves shows visible regrowth within 5\u20137 days of cutting. Stands with depleted reserves take 10\u201314 days to show active shoot growth. If you consistently wait longer than your target interval to see an actively growing stand, root NSC is insufficient for your current cutting frequency \u2014 lengthen the interval immediately.<\/p>\n<\/div>\n

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Progressive stand thinning (fewer stems per square foot)<\/div>\n

Count stems per square foot in multiple field locations at the same time each spring. A healthy productive stand has 5+ stems per square foot. A stand declining from over-cutting shows 3\u20134 stems per square foot and is approaching the 2\u20133 stems-per-square-foot threshold where yield and quality both decline significantly and renovation should be planned. Any stand losing 0.5+ stems per square foot per year should prompt a cutting frequency review.<\/p>\n<\/div>\n

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Increased winter injury severity<\/div>\n

Stands that were consistently over-cut in the summer show disproportionate winter injury compared to stands under the same climate conditions but managed with adequate intervals. If your stand shows 15\u201320% winter kill in a year where neighboring fields show only 5% winter kill, aggressive cutting frequency \u2014 particularly a poorly timed fall cut \u2014 is the most likely cause. Do a root excavation at spring green-up: cut roots vertically and look at the crown and upper root zone. Brown, watery interior tissue indicates winter injury caused by carbohydrate depletion; firm, cream-white tissue indicates healthy overwintering.<\/p>\n<\/div>\n

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Thin, weak first cutting<\/div>\n

A stand that was over-cut the previous summer \u2014 depleted going into winter \u2014 often shows a dramatically reduced first cutting the following spring. If your first cutting yield is significantly lower than expected for the stand density, and the stand looked adequate the previous fall, over-cutting or a poorly timed fall cut is the most likely cause. A single season of aggressive quality-first management in the absence of stand care can cost the following spring’s most valuable cutting.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Cutting Height: The Secondary Lever That Affects Stand Persistence<\/h2>\n

Cutting height \u2014 how close to the ground the mower cuts \u2014 is a secondary factor in stand persistence that interacts with cutting frequency. The standard recommendation is to cut no lower than 2\u20133 inches above the soil surface. The reasons are both mechanical (below-2-inch cutting damages crown buds, the meristematic tissue from which regrowth emerges) and physiological (leaving 2\u20133 inches of stem allows some leaf area to remain for early photosynthesis immediately after cutting, accelerating the first days of regrowth).<\/p>\n

The interaction with cutting frequency: at a relaxed cutting interval (35+ days), a stand can tolerate 2-inch cutting height with minimal crown damage because sufficient time passes between cuts for complete crown bud development. At an aggressive cutting interval (28 days), cutting at 2 inches consistently removes newly formed crown buds before they can develop into shoots \u2014 progressively eliminating the stand’s capacity for vigorous regrowth. If you are operating on a quality-first short-interval program, a cutting height of 3\u20134 inches reduces crown bud damage and extends stand life meaningfully. The mowing and conditioning operations that affect cutting height, cut quality, and subsequent drying rate are covered in the hay making workflow guide<\/a>. For the stand establishment practices that create a stand capable of sustaining intensive cutting management, see the \u82dc\u84ff\u7530\u5efa\u690d\u6307\u5357<\/a>. The mower-conditioner PTO shaft specifications that determine minimum cutting height capability are covered in \u519c\u4e1a\u673a\u68b0\u53d8\u901f\u7bb1\u548c\u52a8\u529b\u8f93\u51fa\u8f74\u4f20\u52a8\u7cfb\u7edf\u90e8\u4ef6\u89c4\u683c<\/a>.<\/p>\n<\/div>\n

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Building Your Season Cutting Calendar<\/h2>\n

\"hay<\/p>\n

A practical cutting calendar for an Upper Midwest 3-cutting program (using Minnesota as an example) built around root carbohydrate recovery and fall dormancy principles:<\/p>\n

\n\n\n\n\n\n\n\n\n
Cutting<\/th>\nTarget date<\/th>\nStage at cutting<\/th>\nRoot NSC status<\/th>\n\u7b14\u8bb0<\/th>\n<\/tr>\n<\/thead>\n
1st cutting<\/td>\nMid to late May<\/td>\nBud to 10% bloom<\/td>\nFull recovery from winter; maximum reserves available<\/td>\nHighest quality of the year; stand enters summer with maximum vigor<\/td>\n<\/tr>\n
2nd cutting<\/td>\nLate June \u2013 early July<\/td>\n10\u201325% bloom<\/td>\nPartial recovery (30\u201335 days after 1st)<\/td>\nHeat stress can extend interval needed; monitor regrowth, not calendar<\/td>\n<\/tr>\n
3rd cutting<\/td>\nLate July \u2013 early August<\/td>\nBud to 10% bloom or 30\u201335 days<\/td>\nPartial recovery; summer heat drives faster recovery<\/td>\nCritical: this cut must be completed by Aug 15 to stay outside fall danger window for most MN locations<\/td>\n<\/tr>\n
Potential 4th<\/td>\nAfter first killing frost only<\/td>\nDormant or nearly dormant<\/td>\nReserves fully replenished; cutting dormant plant is safe<\/td>\nDo NOT take a 4th cutting in September \u2014 falls in danger window. After frost only, or not at all.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Alfalfa Cutting Frequency FAQs<\/h2>\n
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\nMy neighbor cuts alfalfa every 25 days and his stand looks fine. Why do extension recommendations say 28\u201335 days?+<\/span><\/summary>\n
A stand can absorb aggressive cutting management for 1\u20133 years before the cumulative root carbohydrate depletion becomes visible as thinning. The stand that looks fine today at 25-day intervals may be at its 2nd or 3rd year of intensive management. The research recommendation of 28\u201335 days is based on stand persistence over a 7\u201310 year horizon \u2014 not on how the stand looks in any single season. Ask your neighbor how old his stand is and what his replacement rate has been. Operations running consistent 25-day intervals in summer often find their stands needing renovation at year 4\u20135 rather than year 8\u201310, increasing their annualized establishment cost by 60\u2013100%. The economics of high-frequency cutting only favor quality-first management when the annual premium value of the higher-quality hay exceeds the prorated cost of earlier stand replacement.<\/div>\n<\/details>\n
\nCan I recover a stand that has been over-cut and shows stress symptoms?+<\/span><\/summary>\n
Yes \u2014 if the stand still has 3+ stems per square foot and the plants show active regrowth (just slow), a one-season recovery program can restore significant vigor. The recovery approach: extend the next cutting interval by at least 10\u201314 days beyond your normal interval; allow the stand to reach full bloom (50%+) rather than cutting at bud stage for this single cutting; this allows the maximum root NSC replenishment possible in a single recovery cycle. Do this for 2 consecutive cuttings if the stand stress was significant. Most stands respond with visibly improved regrowth speed and density after 1\u20132 recovery cuttings. A stand that has thinned below 3 stems per square foot is unlikely to recover density \u2014 at that point, renovation planning is a better investment than continued management of a thinning stand.<\/div>\n<\/details>\n
\nDoes irrigation timing relative to cutting affect stand recovery?+<\/span><\/summary>\n
Yes \u2014 significantly. Irrigation timing immediately after cutting accelerates root NSC recovery by supplying water for the photosynthetic processes that generate carbohydrate surplus. Irrigated alfalfa that receives water within 2\u20133 days of cutting shows 15\u201325% faster regrowth than irrigated alfalfa that is water-stressed for 5\u20137 days post-cut. This faster recovery means irrigated operations can often operate on slightly shorter intervals than dryland operations in the same climate because the accelerated photosynthesis and growth rate keeps root NSC above the recovery threshold even at 28-day intervals. Conversely, delaying irrigation after cutting (common when irrigation equipment scheduling constraints cause 7\u201310 day waits post-cut) slows recovery and effectively lengthens the safe cutting interval needed. Plan irrigation scheduling to deliver water within 3 days of each cutting for maximum recovery rate.<\/div>\n<\/details>\n
\nHow does cutting frequency interact with weed pressure in the stand?+<\/span><\/summary>\n
More frequent cuttings that maintain a dense alfalfa canopy provide better weed suppression than less frequent cuttings, because the dense fast-regrowing alfalfa shades out germinating annual weeds between cuttings. However, the thinning that results from over-cutting has the opposite effect: as the stand density drops from over-cutting stress, gaps in the canopy open and annual weeds \u2014 especially summer annuals like pigweed, lambsquarters, and foxtail \u2014 colonize those gaps aggressively. The weed pressure in a thinning stand then compounds the stand’s problems, as the weeds compete with the already-stressed alfalfa for moisture and nutrients. This feedback loop is one reason that over-cut stands deteriorate faster than the cutting frequency alone would predict: over-cutting thins the stand, thinning opens weed niches, weed competition further stresses the alfalfa, and the combined stress accelerates thinning beyond what cutting frequency alone would cause.<\/div>\n<\/details>\n
\nDoes a potassium-deficient soil respond differently to cutting frequency than a well-fertilized stand?+<\/span><\/summary>\n
Yes \u2014 significantly. Potassium (K) is essential to non-structural carbohydrate metabolism and phloem transport, including the process of loading and unloading sugars from the root storage tissue. A stand on potassium-deficient soil has a reduced capacity to both accumulate and mobilize root NSC, which means its effective safe cutting interval is longer than a well-fertilized stand under the same climate. Research consistently shows that potassium deficiency produces stands that are 30\u201350% more sensitive to cutting interval shortening than adequately fertilized stands. If your soil K is low, adding 2\u20133 weeks to your target cutting interval is not optional \u2014 it is necessary to compensate for the K-limited carbohydrate storage capacity. Soil testing and targeted K supplementation before shortening cutting intervals is strongly recommended for any stand that has not been tested in the past 2 years.<\/div>\n<\/details>\n
\nIs it better to take fewer, higher-quality cuts or more lower-quality cuts from the same acreage?+<\/span><\/summary>\n
For most commercial operations, fewer higher-quality cuts is the better financial choice \u2014 but the correct answer depends on your market structure. If you have a direct dairy or export market that pays $20\u2013$40\/ton premium for Supreme grade hay, a 4-cutting program where 3 of 4 cuts achieve Supreme grade will outperform a 6-cutting program where most cuts achieve Premium or Good grade, both financially and in terms of stand longevity. If your only market is a local hay elevator without a structured quality premium system, more cuttings at equivalent total yield may produce better revenue because you are selling tons rather than quality. Calculate both scenarios using your actual market prices and your realistic quality achievement at each cutting frequency before making the program decision.<\/div>\n<\/details>\n<\/div>\n<\/div>\n
\"foragebaler.com<\/p>\n

Get Equipment Matched to Your Alfalfa Cutting Program<\/h3>\n

Tell us your cutting frequency target, market channel (elevator, direct dairy, export), and annual tonnage. We help you select the baler, mower, and rake combination that supports your quality and yield goals without stand-limiting compromises.<\/p>\n

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Get Equipment Advice<\/a><\/p>\n<\/div>\n

\u7f16\u8f91\uff1aCxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Alfalfa Stand Management Guide Alfalfa Cutting Frequency: Stand Life vs Yield Trade-offs Every cut you take from an alfalfa stand is a transaction \u2014 you receive a check of high-quality feed while the plant draws down its root carbohydrate reserves to fund the recovery. Cut too often and those reserves are never fully replenished. Cut […]<\/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":[28],"tags":[],"class_list":["post-865","post","type-post","status-publish","format-standard","hentry","category-forage-baler"],"_links":{"self":[{"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/posts\/865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/comments?post=865"}],"version-history":[{"count":1,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/posts\/865\/revisions"}],"predecessor-version":[{"id":866,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/posts\/865\/revisions\/866"}],"wp:attachment":[{"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/media?parent=865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/categories?post=865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/foragebaler.com\/zh\/wp-json\/wp\/v2\/tags?post=865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}