Fertility on a Budget Brian Arnall Precision Nutrient Management | - PowerPoint PPT Presentation

Fertility on a Budget Brian Arnall Precision Nutrient Management | Oklahoma State University 20 min

Importance of Proper Fertility Multi- Nutrient Variable Application • Much like a Ladder In-Season • One Step at a Time. Cues Secondary & Micros N & S P & K Soil pH

P and K Fertility • How do you make P and K Recs? • Feed the Crop • Sufficiency • Feed the Soil • Replacement Nutrient response curve based on soil test, Rutgers Cooperative Extension.

Sufficiency Based • Feed the Crop. • Concentration of nutrient near the root. PSS ‐ 2266 Fertilization Based on Sufficiency, Build ‐ up and Maintenance Concept

P and K Fertility • Feed the Crop • Feed the Soil • Build • Maintain • Know the critical level for the Nutrients • Know the Test! Build ‐ up maintain fertilizer scheme suggested by the Ohio State University. PSS ‐ 2266 Fertilization Based on Sufficiency, Build ‐ up and Maintenance Concept

Phosphorus Removal Rates Yield Wheat Corn Soybean 20 8 8 16 40 16 15 32 60 24 23 48 80 32 30 64 100 40 38 80 125 50 48 100 150 60 57 120 175 70 67 140 200 80 76 160

Starter Fertilizers • Good Opportunity • Better Efficiency • A little Goes a Long way • KISS

Starters in Sorghum Billings 14 Enid 14 RedRock14 Irrigated 14 Dryalnd 15 Irrigated 15 Percent Stand, compared to check. 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5

Starter Fertilizers Billings 14 Enid 14 RedRock 14 Irrigated 14 Dryland 15 Irrigated 15 Percent Yield, compared to check. 1.4 1.2 1.0 0.8 0.6 0.4

Thank Thank you!!! u!!! Please fill out the Survey Brian Arnall 373 Ag Hall 405 ‐ 744 ‐ 1722 b.arnall@okstate.edu www.npk.okstate.edu Twitter: @OSU_NPK www.Facebook/ OSUNPK YouTube Channel : OSUNPK Blog : OSUNPK.com www.Aglandlease.info