Organic Nutrient Blend & N, P, K from Your Mix
Blends FYM
“The best tip on this tool is probably in the comments already.
Blending farmyard manure, vermicompost and neem cake supplies N, P and K plus organic matter — each has a different content, so enter your quantities to total the nutrients supplied.
Build your organic blend
Next: spread the 1,600 kg blend and credit roughly 17.5/7/12.5 kg of N-P-K against your crop's requirement before topping up with any mineral fertiliser.
Nutrient content of organics varies widely with source and maturity; these are typical preset percentages (FYM 0.5-0.2-0.5, vermicompost 1.5-0.8-1.2, neem cake 5-1-1.5). Much of the N mineralises slowly over the season.
Organic nutrient blend — key facts
- Total NPK
- Σ (quantity × nutrient %)
- FYM
- ≈ 0.5% N, slow & bulky
- Vermicompost
- ≈ 1.5–2% N, microbe-rich
- Neem cake
- ≈ 4–5% N, slow-release
- Bonus
- organic matter + soil structure
- First-season N
- ≈ a third to a half available
- Use with
- a reduced mineral dose if needed
- Privacy
- Runs in your browser; nothing uploaded
Build the soil while you feed the crop
No single organic input does it all: farmyard manure brings bulk organic matter but dilute nutrients, vermicompost adds a richer, microbe-laden feed, and neem cake delivers concentrated, slow-release nitrogen with pest-deterrent properties. Blending them balances the N, P and K while building soil structure, water-holding and biology — the foundation of lasting fertility rather than a one-season fix.
This tool totals the nitrogen, phosphorus, potassium and combined weight from your quantities and each source's nutrient content, so you can balance the mix, compare it against the crop's requirement, and see the organic share you're supplying. Pair it with the Compost Recipe, FYM Fertilizer Equivalent and Vermicompost Production tools for a full organic plan.
Balance the blend
Mix sources to hit your N, P, K target.
Know the real NPK
Total the nutrients across all inputs.
Build soil health
Add organic matter and feed soil life.
Trim mineral inputs
See the organic share to cut the rest.
Frequently Asked Questions
What does an organic nutrient blend do?+
Blending farmyard manure (FYM), vermicompost and neem cake supplies nitrogen, phosphorus and potassium together with organic matter that feeds soil life and improves structure. Because each source has a different nutrient content, mixing them lets you build a balanced organic feed and total the N, P and K your soil actually receives.
How is the blend's NPK calculated?+
Each input's quantity is multiplied by its N, P and K percentages, then summed across the three sources to give total nitrogen, phosphorus and potassium plus the combined weight. For example a few tonnes of FYM, some vermicompost and a sack of neem cake each contribute their share, and the tool adds them into a single N–P–K total.
What is the nutrient content of FYM?+
Well-rotted farmyard manure is relatively dilute — typically around 0.5% N, 0.2% P and 0.5% K on a fresh-weight basis, though it varies widely with animal, bedding, age and storage. Its real value is bulk organic matter that improves soil structure and water-holding alongside a steady, slow release of nutrients.
How does vermicompost compare?+
Vermicompost — manure and residues digested by earthworms — is more concentrated and finely structured than raw FYM, often around 1.5–2% N with useful P and K plus beneficial microbes and growth-promoting compounds. It releases nutrients steadily and is excellent for nurseries, vegetables and as a soil conditioner.
Why add neem cake?+
Neem cake, the residue after oil extraction from neem seed, is a richer nitrogen source (around 4–5% N with P and K) and acts as a slow-release organic fertilizer. It also has nematicidal and pest-repellent properties and can slow nitrification, helping nitrogen stay available longer in the soil.
Can an organic blend fully replace chemical fertilizer?+
It can over time, but organic nutrients release slowly and are dilute, so you need much larger quantities and patience as soil biology builds. Many growers blend organics with a reduced mineral dose to meet a crop's peak demand while improving soil health. This tool shows the organic share you're supplying.
How much of the nitrogen is available the first season?+
Not all of it — organic nitrogen mineralises gradually, so roughly a third to a half may become plant-available in the first season, with the rest released over following years as residues break down. That carry-over is a benefit, but it means a single organic application acts more slowly than a soluble fertilizer.
Does the blend add more than N, P and K?+
Yes — and that's much of the point. Organic blends add organic matter, secondary nutrients and micronutrients, plus they feed soil microbes, improve structure, aeration and water-holding, and reduce crusting. The N, P and K total is the headline figure, but the soil-building effect is a lasting bonus.
Are the figures precise?+
They're solid planning estimates based on the nutrient percentages you enter. Real organic materials vary enormously with source, moisture, age and processing, so test a representative sample where it matters. Use the result to balance the blend and compare against your crop's requirement rather than as an exact dose.
Related farming tools
1900+ free tools, zero sign-up
Calculators, developer & SEO utilities, data, content, hardware and farming — all instant, private and in your browser.
Cat Vaccination Schedule
Build a complete cat vaccination schedule from 6 weeks to senior. AAFP 2020 core (FVRCP, Rabies) + non-core (F
Open FarmingInventory Carrying Cost Calculator
Free inventory carrying cost calculator for farms. Holding grain, inputs or produce costs money — interest on
Open Dev & SEOGraphQL Query Example Generator
Paste a GraphQL schema and generate runnable example operations: queries and mutations for any root field, typ
Open Niche10-10-10 Decision Making Tool
Diamond-grade decision making tool with the 10-10-10 framework dial (Suzy Welch), Monte Carlo regret-score pan
Open ContentImage to TGA Converter
Convert images to TGA (Targa), the classic format for game textures and 3D work with clean alpha support.
Open HardwareSilicon Architecture Explorer
Explore CPU and GPU silicon: group every part by microarchitecture (Zen, Ada Lovelace, RDNA, Ampere, Blackwell
Open ProductivityPassword Strength Tester
Open ProSettings
Choose your theme, reading size, and script (Devanagari / IAST), and export, import, or clear your private pra
Open CalculatorCat Water Intake Calculator
Calculate exactly how much water your cat needs per day (≈60 ml/kg) and how much comes from wet food vs drinki
Open FarmingLand Lease vs Buy Calculator
Free land lease vs buy calculator. Compare leasing farmland against buying it over your holding period — total
Open Dev & SEOGraphQL Schema Visualizer
Advanced GraphQL schema visualization tool with interactive graphs, multiple view modes, smart filtering, and
Open NicheE-commerce ROI Calculator
Diamond-grade e-commerce ROI calculator with a traffic → cart → checkout → won funnel and a margin breakdown b
Open ContentImage to TIFF Converter
Convert images to TIFF, high-fidelity, lossless files for print, scanning and archiving.
Open HardwareCPU GPU Compare Pro
Compare any two CPUs or GPUs side by side: metric-by-metric table with the winner highlighted, the performance
Open ProductivityPassword Tools
Test password strength against real standards (NIST 800-63B, OWASP ASVS), check against known breaches via k-a
Open ProInstagram Reel to SRT
Paste an Instagram Reel link and get accurate SRT subtitles in seconds. Free, no sign-up, runs in your browser
Open CalculatorCat Weight Loss Calculator
Plan a vet-safe weight-loss program for an overweight cat. Pulls breed ideal weight (13 CFA breeds), plots a s
Open FarmingLand Rent Calculator
Free land rent calculator. Compare a fixed cash rent per acre against a crop-share lease (a % of yield × price
Open Dev & SEOJSON Schema Explorer
Paste a JSON Schema and explore it as an interactive tree — every property, type, required flag and constraint
Open NichePartnership ROI Calculator
Diamond-grade partnership ROI calculator with a multi-channel partner stream graph and rev-share carve-out. Be
Open ContentImage to WBMP Converter
Convert images to WBMP, the lightweight one bit bitmap built for simple mobile displays.
Open HardwareHardware Benchmark Database Pro
Searchable, sortable CPU and GPU database: normalized performance index, perf-per-dollar and perf-per-watt, ti
Open ProWhich LLM Can My PC Run?
Free local LLM advisor: auto-detects your GPU, VRAM and RAM, then shows the exact models you can run — with re
Open CalculatorDog Age Calculation
Under 20 lbs (Chihuahua, Pomeranian)
Open