Nitrosol Ltd formally Rural Research Ltd

What Nitrosol Ltd formally Rural Research Ltd does

Nitrosol Ltd, originally established as Rural Research Ltd, is a privately-held New Zealand manufacturer of biological liquid fertilisers, founded in 1975 by veterinary scientist Dr. Gabriel Peter Kauzal. The company develops and produces amino acid-based liquid fertilisers derived from natural protein sources (ruminant blood and bone, deep-sea fish by-products, plant-based inputs), combined with trace minerals and formulated for foliar feeding application. Its product portfolio is organised across core liquid fertilisers (Original, Oceanic, Organic, EcoGro), specialised additives (Nitrogen Booster, MagSulphate, MicroLime, Calciprill, Seaweed Flakes, Gibb A90, Brimstone sulphur), pre-blended products, and a dedicated home garden retail range. Several products carry BioGro Organic and IFOAM certifications, and Gibb A90 is registered under New Zealand's ACVM Act 1997.

The company operates a hybrid go-to-market model combining direct sales (phone and email for bulk orders) with a broad NZ distribution network spanning agricultural cooperatives (Farmlands, PGG Wrightsons, Horticentre, Farmsource, Rainbow & Brown), specialty suppliers, and retail hardware (Mitre10) for turf products, alongside export distribution internationally since the early 1990s. Pricing is unit-based with volume tiering (e.g., 20L to 1000L for agricultural SKUs, 500mL/1L for home garden), with no subscription model. Customer segments include dairy, sheep and beef, broadacre crop farming, horticulture (avocados, kiwifruit), home gardeners, and turf management. Support infrastructure includes territory managers providing soil sampling and on-farm advisory services, complemented by a monthly newsletter, content marketing, and social media presence.

The company is 100% NZ-owned and operated with headquarters and production in East Tamaki, Auckland, managed by Managing Director Paul with a small leadership team covering sales, technical, finance/operations, and production. Key differentiators include the 50-year proprietary formulation heritage, amino acid-based chelation technology, certified organic credentials, and documented field-trial outcomes showing yield improvements of 30-49% in hay production.

Name

Nitrosol Ltd formally Rural Research Ltd

Legal name

Nitrosol Ltd

Website

https://nitrosol.co.nz

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

11–50 employees

Short description

Nitrosol Ltd is a privately-held, New Zealand-owned manufacturer of biological liquid fertilisers founded in 1975, producing amino acid-based products derived from blood, bone, and fish by-products for dairy, sheep/beef, horticulture, crop, turf, and home garden customers across domestic and export markets.

Ownership category

akta.pro rank

Product category

Agricultural Biological Fertilisers

NAICS

Fertilizer and Compost Manufacturing (32531), Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (3253)

akta.pro primary industry

Foliar Fertilizers & Foliar Nutrition Programs (AFABACAC)

akta.pro secondary industries

Water-Soluble Fertilizers (WSF) & Fully Soluble NPK Blends (AFABACAB), NPK & Compound/Blended Fertilizers (IMAEAEAD)

Keywords

• Biological liquid fertilisers
• Foliar feeding solutions
• Soil amendment products
• Amino acid fertilisers
• Organic certified fertilisers

Headquarters

HQ city

East Tamaki

HQ country

New Zealand

HQ region

Oceania

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Marketing or Sales, Technology or R&D

Revenue model

1. Biological Liquid Fertiliser Sales: Sale of concentrated liquid biological fertilisers in various pack sizes (5L to 1000L) to agricultural, horticultural, and home garden customers through direct sales and distribution partners.
2. Soil Amendment Products: Sale of complementary soil amendment products including MicroLime, Calciprill, MagSulphate, Seaweed Flakes, and Brimstone elemental sulphur.
3. Specialty Products: Sale of specialty products including TurfXpert for turf management and Gibb A90 plant growth promotant.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Nitrosol manufactures biological liquid fertilisers formulated from blood, bone, and fish by-product amino acids, supplying agriculture, horticulture, dairy, sheep and beef, cropping, turf, and home garden markets across New Zealand and selected export markets. The product range includes foliar fertilisers, soil amendments, gibberellic acid growth promoters, micronised lime, elemental sulphur, and seaweed-based products.

Product overview

Nitrosol Ltd is a New Zealand-based biological fertiliser company established in 1975, formally Rural Research Ltd. The company offers a comprehensive portfolio of liquid biological fertilisers centred on its core amino acid-based formulations derived from blood, bone, and fish by-products. The product line is architecturally organized around three tiers: (1) Core liquid fertilisers including Nitrosol Original, Nitrosol Oceanic, Nitrosol Organic, and Nitrosol EcoGro for broad-spectrum agricultural and horticultural use; (2) Specialized additives including Nitrogen Booster for nitrogen enrichment, MagSulphate for magnesium/sulphur correction, MicroLime and Calciprill for pH adjustment, Seaweed Flakes for micronutrient supplementation, Gibb A90 for growth promotion, and Brimstone WDG for sulphur correction; (3) Ready-to-use blend products combining core formulations with boosters; and (4) A dedicated home garden range including Blood & Bone, Oceanic Fish, Organic Fish & Seaweed, Seaweed Tonic, Tomato, and Green Plant Based fertilisers in retail concentrate sizes. All products support foliar feeding and soil biology enhancement through amino acid nutrition, trace minerals, and organic matter, with several formulations carrying BioGro Organic and IFOAM certifications.

Differentiator

Problem solved

Functional benefit

Brands

• Nitrosol Original: The original formulation developed by Dr. Peter Kauzal, made from ruminant blood and bone with balanced NPK of 11-5-7 plus trace elements and minerals.
• Nitrosol Oceanic
• Nitrosol Organic
• Nitrosol Nitrogen Booster
• Nitrosol EcoGro
• Nitrosol MicroLime
• Nitrosol Calciprill
• Nitrosol MagSulphate
• Nitrosol Gibb A90
• Nitrosol Seaweed Flakes
• TurfXpert

Products and services

• Nitrosol Original Fertiliser Core biological liquid fertiliser made from blood and bone amino acid complex, used as a foliar feed and soil drench for pasture, crops, horticulture, and broadacre agriculture.
• Nitrosol Oceanic Fertiliser Liquid fertiliser produced from marine fish by-products, formulated for foliar application across pasture, horticulture, and broadacre farming.
• Nitrosol Organic Fertiliser Organic-certified (BioGro) liquid fertiliser based on amino acid fish complex, suitable for organic certified growers and pasture producers.
• Nitrosol EcoGro Fertiliser BioGro-certified organic liquid fertiliser and soil conditioner, providing foliar nutrients and soil biology for pasture, crops, and horticulture.
• Nitrosol Nitrogen Booster Concentrated nitrogen-boosting liquid additive blended with other Nitrosol fertilisers to lift protein levels and pasture growth.
• Nitrosol MagSulphate Liquid magnesium sulphate foliar fertiliser for correcting magnesium and sulphur deficiencies in pasture and crops.
• Nitrosol Gibb A90 Gibberellic acid-based plant growth promoter formulated for dairy pasture and sports turf applications.
• Nitrosol Seaweed Flakes Dried seaweed flakes used as a soil amendment and natural source of trace elements and minerals.
• Nitrosol MicroLime Ultra-fine micronised lime soil amendment for fast-acting pH correction and improved soil structure.
• Nitrosol Calciprill Granular calcium lime fertiliser for pasture and cropping applications requiring lime and calcium supplementation.
• TurfXpert Liquid fertiliser formulated specifically for the sports turf and professional lawn care market.
• Brimstone WDG Elemental Sulphur Water-dispersible granular elemental sulphur fertiliser for broadacre and pastoral sulphur deficiency correction.
• Nitrosol Blend Fertiliser (Oceanic & Nitrogen Booster) Pre-blended liquid fertiliser combining Oceanic and Nitrogen Booster for enhanced pasture response.
• Nitrosol Blend Fertiliser (Original & Nitrogen Booster) Pre-blended liquid fertiliser combining Original and Nitrogen Booster for enhanced pasture response.
• Blood & Bone Liquid Natural Fertiliser (Home Garden) Retail-packaged home garden liquid fertiliser based on the Nitrosol Original blood and bone formulation for general garden use.
• Oceanic Fish Liquid Natural Fertiliser (Home Garden) Retail-packaged home garden liquid fertiliser based on the Nitrosol Oceanic fish formulation for general garden use.
• Organic Liquid Fish & Seaweed Based Fertiliser (Home Garden) Retail-packaged BioGro organic certified liquid fertiliser combining fish and seaweed for home garden use.
• Seaweed Liquid Natural Tonic (Home Garden) Retail-packaged liquid seaweed tonic for home garden soil and plant health.
• Tomato Liquid Natural Fertiliser (Home Garden) Retail-packaged home garden liquid fertiliser formulated for tomato and vegetable growing.
• Green Liquid Natural Plant Based Fertiliser (Home Garden) Retail-packaged home garden liquid fertiliser formulated for general plant feeding and lawn care.

Quantifiable outcome

• Hay yield increase from 110 bales/acre to 143 bales/acre (30% increase) in Southland farm trial
• +4 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• AgrecoverycoreStrategic or Co-development PartnerNitrosol Ltd participates in the Agrecovery rural recycling programme, allowing customers to conveniently recycle plastic containers from the farm. The programme includes over 90 collection sites nationwide and handles containers from 0-60 litres and larger drums (61-1000 litres). Collections occur quarterly throughout New Zealand. The partnership supports sustainable farming practices by providing responsible disposal of packaging materials.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Omex Agrifluids: UK-based manufacturer of liquid foliar fertilisers, suspension fertilisers, and plant health products. Closely comparable to Nitrosol on foliar feeding technology and water-soluble liquid formulation serving arable, horticulture, and turf customers.
• Haifa Group: Israel-based global specialty fertiliser manufacturer known for water-soluble NPK and foliar feeding products. Closely aligned with Nitrosol in product form (water-soluble liquids), application method (foliar), and target crops (horticulture and broadacre).
• Valagro (Syngenta Biologicals): Italy-based (now part of Syngenta) biostimulant and specialty plant nutrition company producing amino acid, seaweed, and microbial-derived products. Closely comparable to Nitrosol on amino acid chelation and biological positioning for horticulture and broadacre.
• Biolchim S.p.A. Italian biostimulant manufacturer producing liquid fertilisers, biostimulants, and specialty plant nutrition products derived from amino acids and seaweed. Comparable to Nitrosol on formulation technology and crop nutrition positioning for international horticulture and broadacre markets.
• BioAg Pty Ltd: Australian biological fertiliser and soil fertility specialist producing liquid and solid biological inputs for pasture and cropping. Closely comparable to Nitrosol in biological/amino-acid positioning, target market (pastoral and broadacre), and trans-Tasman distribution footprint.

Regional players

• Ravensdown: New Zealand farmer-owned fertiliser cooperative offering solid and liquid fertilisers, soil testing, and agronomy services. Operates in the same NZ agricultural channel ecosystem as Nitrosol, frequently appearing on the same stockist rosters, making it the most directly comparable domestic competitor.
• Ballance Agri-Nutrients: New Zealand farmer-owned fertiliser cooperative providing bulk NPK fertilisers, specialty blends, and soil testing services. Competes head-to-head with Nitrosol in NZ dairy, sheep/beef, and horticulture channels and is the other major domestic fertiliser incumbent.

Broad incumbents

• ICL Group: Israel-based specialty fertiliser and plant nutrition multinational producing controlled-release, water-soluble, and foliar fertilisers. Overlaps with Nitrosol on specialty plant nutrition but spans a much broader portfolio including phosphate, potash, and industrial chemicals.
• Yara International: Global nitrogen fertiliser leader with a growing specialty and foliar crop nutrition portfolio (YaraVita). Overlaps with Nitrosol on foliar feeding and water-soluble NPK products but operates at vastly greater scale across commodity nitrogen as well.

Emerging players

• FBSciences: US-based biological plant health company producing fertiliser-compatible biostimulants and nutrient efficiency products. Comparable emerging player with overlapping biological-input positioning for row crops and speciality agriculture, though with a different technology base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/Nitrosol
• Instagraminstagram.com/nitrosol_nz
• LinkedInlinkedin.com/company/rural-research-ltd

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Nitrosol Ltd formally Rural Research Ltd