Riley County, KS Extension Office & Soil Testing Directory
Welcome to the official directory resource for Riley County, KS. Connecting local homeowners, urban gardeners, and commercial growers with Kansas's land-grant university extension resources, state soil testing lab services, and Master Gardener volunteer clinics.
1. Extension Office Contact Details & Operational Hours
The Kansas State University Extension - Riley County serves as the primary educational extension center in Riley County. Visit or call during standard operational hours for agricultural advice, soil sample kits, and youth 4-H programs.
| Official Office Name: | Kansas State University Extension - Riley County |
| Physical Address: | Manhattan, Kansas 66502 |
| Direct Phone Desk: | (201) 555-0199 |
| Email Contact: | riley@ksu.edu |
| Office Hours: | Monday – Friday: 8:00 AM – 4:30 PM |
| Official Web Portal: | https://www.agronomy.k-state.edu/services/soiltesting/ |
2. Official Soil Testing Laboratory & Pricing
Testing your soil is the single most important step before adding fertilizers or agricultural lime. The official testing laboratory serving Riley County is K-State Research and Extension Soil Testing Lab.
| Official Testing Lab: | K-State Research and Extension Soil Testing Lab |
| Lab Location: | 2308 Throckmorton Ctr, Manhattan, KS 66506 |
| Routine Sample Fee: | $12 routine soil sample |
| Expected Turnaround: | 5 to 7 business days |
| Official Lab Website: | https://www.agronomy.k-state.edu/services/soiltesting/ |
How to Collect and Submit a Soil Sample in Riley County:
- Pick up a Soil Kit: Pick up official sample boxes and submittal forms at the Kansas State University Extension - Riley County (Manhattan, Kansas 66502).
- Collect Sub-Samples: Use a clean stainless steel trowel to take 10 to 12 soil cores from a 4-to-6-inch depth across your garden or lawn area.
- Air-Dry: Mix sub-samples in a clean plastic bucket and air-dry on clean paper at room temperature (never use an oven).
- Submit Sample: Return your filled soil box to the extension office or mail directly to K-State Research and Extension Soil Testing Lab.
3. Master Gardener Volunteer Program & Plant Clinic
The Riley County Extension Master Gardener Volunteers provides free plant disease diagnostics, lawn care advice, and eco-friendly pest management tips.
| Program Name: | Riley County Extension Master Gardener Volunteers |
| Plant Clinic Hours: | Tuesday & Thursday: 9:00 AM – 12:00 PM (Note: Plant clinics run seasonally; call office during winter months) |
| Direct Helpline Phone: | (201) 555-0199 |
| Program Portal: | https://www.agronomy.k-state.edu/services/soiltesting/ |
Volunteer Training: Comprehensive horticulture training conducted by Kansas State University Extension.
4. Regional Soil & Growing Snapshot for Riley County
USDA Plant Hardiness Zone: Zone 5b / 7a
Natural Soil Profile: Great Plains Silt Loam & Clay
Popular Local Crops: Wheat, grain sorghum, sunflowers, tomatoes, turf
Extension Specialist Tip: High winds increase evaporative stress; maintain soil organic cover with organic mulches.
5. 🧮 Interactive Soil Amendment Calculator for Riley County
Estimate the recommended agricultural limestone or elemental sulfur needed to adjust your garden soil pH based on local Great Plains Silt Loam & Clay characteristics.
📚 Recommended Extension Guides & Soil Articles
Learn more about interpreting your Riley County extension soil test report and managing plant nutrients:
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Riley County, KS
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions (Riley County Directory)
The Kansas State University Extension - Riley County is located at Manhattan, Kansas 66502. You can call their main desk directly at (201) 555-0199 during standard business hours (Monday – Friday: 8:00 AM – 4:30 PM).
Standard soil analysis for Riley County garden samples through K-State Research and Extension Soil Testing Lab costs $12 routine soil sample. Check with the office for special sample types.
You can reach the Riley County Extension Master Gardener Volunteers hotline by calling (201) 555-0199 during plant clinic hours (Tuesday & Thursday: 9:00 AM – 12:00 PM).
Riley County falls primarily within USDA Plant Hardiness Zone 5b / 7a. Local soil is characterized as Great Plains Silt Loam & Clay.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.