Does the envelope need a stamp?

Yes, you will have to buy a priority mail stamp for about seven bucks

Can this be used to determine "soil percolation" capabilities of a person's yard ? Can it tell makeup % of clay, sand, loam, organic?

I don't think so. If you would like to know about the percolation rate of the soil in your yard, the most reliable method is a field measurement where you dig a hole in the soil and fill it with water. Return every few hours to monitor the rate at which the water level goes down. I recommend staking a cheap yard stick in the hole. It is relatively simple to calculate the percolation rate in inches/hour. Ideally, this would be done when the surrounding soil is moist, so you should refill the hole a few times and use the percolation rate from the third filling. Alternatively, wait for the rainy season. If you would like to know the distribution of particle sizes in your soil, you might try a basic "jar test". All you need is a jar and water. This will give you a very rough idea about the texture of your soil.

Is there an additional cost to mail in or is postage included in the price of the kit?

Yes you will have to pay postage to send it back for testing. You will have your results in 24-48 hours after they receive your sample.

Does it test for sulfur?

Thank you for your question about the Whitetail Institute Laboratory Soil-Test Kit. According to the manufacturer, "No, this test does not test for Sulfur, but it does test for other nutrients like Phosphorus (P), Potassium (K), Calcium (Ca), and Magnesium (Mg)." Please let us know if you have any other questions or concerns. Thank you again, and have a wonderful day!

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Whitetail Institute Laboratory Soil Test Kit, Ensures The Most Successful Deer Food Plot Possible, Professional Consultation Included, Receive Results Within One Week

Whitetail Institute Laboratory Soil Test Kit, Ensures The Most Successful Deer Food Plot Possible, Professional Consultation Included, Receive Results Within One Week

Product ID: 20573195

💰Saves money on fertilizer

🧪Professional soil analysis

⏱️Results in 1 week

R610

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Unlock the secret to the ultimate deer food plot—test smart, grow smarter!

FAST TURNAROUND - Receive detailed results and expert recommendations within just one week.
COMPLETE EASY KIT - All-in-one package designed for effortless soil sampling by any adult user.
COST EFFICIENT GROWTH - Optimize your investment by applying only what your soil truly requires.
PRECISION SOIL INSIGHTS - Know exactly how much lime and fertilizer your plot needs—no guesswork, no waste.
EXPERT CONSULTATION INCLUDED - Get professional guidance to maximize your deer food plot success.

The Whitetail Institute Laboratory Soil Test Kit delivers precise soil composition analysis with professional consultation, enabling hunters and land managers to optimize fertilizer and lime use. Easy to use and complete with everything needed, it provides actionable results within one week to ensure the most successful deer food plot possible while saving money and effort.

Specifications

ASIN	B00XOBFSH2
Age Range Description	Adult
Best Sellers Rank	#17,518 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #8 in Soil Test Kits
Brand Name	Whitetail Institute
Customer Reviews	4.4 4.4 out of 5 stars (823)
Educational Objective	Soil Composition Analysis and Food Plot Success Guidance
Global Trade Identification Number	00789976000091
Included Components	Soil Test Kit
Item Dimensions	9 x 7 x 1 inches
Item Type Name	Soil Test Kit
Item Weight	2.72 ounces
Manufacturer	Whitetail Institute of North America
Manufacturer Minimum Age (MONTHS)	1
Manufacturer Part Number	STK
Manufacturer Warranty Description	1-Year Warranty
Material Type	Blend
Model Number	STK
Number of Items	1
Set Name	Soil Test Kit
Size	1
Theme	Insects
UPC	789976000091
Unit Count	1 Count

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R610

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Best international shipping I've ever tried. Worth every penny!

3 days ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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