what is the difference between (a) “andersons charx” with humic acid/biochar and … (b) “andersons humichar” also with same humic acid/biochar ?

Nothing one is e-commerce/consumer sku humichar the the other one is the Pro sku

how many square feet does this bag cover?

10,000 to 40,000 sq ft. from High to Low rate.

What is the percentage of carbon and humic acid?

You're kidding right? In the product description it says: About this item HumiChar is an organic, carbon-based soil amendment containing 50% high-quality humic acid and 50% granulated biochar -- Provides the benefit of quickly-available humic acid and the long-term soil building qualities of the biochar that lasts for decades

What is the shelf life for this product? I have a smaller lawn so might use this for 2-3 years. Will it stay good?

Doc's says it will last, unused, for years. I also have a small lawn, only 3200 sqft. I break it down into two applications about 6 to 8 weeks apart. Don't forget the recommended application of chicken feed.

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🌿 Transform your soil, transform your world!

MASSIVE COVERAGE - Covers up to 12,000 sq ft with just 12 lbs—big impact, minimal effort
VERSATILE APPLICATION - Easily blends with fertilizers or works solo to boost lawns, plants, and soil health
PATENTED DG TECHNOLOGY - Ensures ultra-efficient nutrient breakdown and absorption, maximizing plant growth
DUAL ACTION SOIL POWERHOUSE - Combines quick-acting humic acid with long-lasting biochar for sustained soil vitality
ECO FRIENDLY OMRI CERTIFIED - Organic, sustainable, and safe for your garden and the planet

The Andersons HumiChar is a premium organic soil amendment blending 50% humic acid and 50% granulated biochar, enhanced with patented DG Technology for rapid nutrient delivery and long-term soil improvement. Covering 12,000 sq ft per 12 lbs, it’s OMRI listed, eco-friendly, and designed to boost plant, lawn, and soil health while reducing fertilizer dependency.

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Product Dimensions	38.1 x 35.56 x 10.16 cm; 5.44 kg
Part number	1
Item volume	12 Litres
Manufacturer	The Andersons
Item model number	12
ASIN	B08ZBGQNJ7

The Andersons HumiChar Organic Soil Amendment with Humic Acid and Biochar Covers 12,000 sq ft (12 lb)

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