Potassium Fertility Research and Education

Crop-Specific K Recommendations

General Crops

• North Dakota Fertilizer Recommendation Tables - North Dakota State University
• Soil Fertility for Forage Crops - Penn State
• Fertilizer Recommendation Guide - South Dakota State University
• Field Trials on Validation of Phosphorus and Potassium - Clemson University
• Soil fertility management for forage crops - Penn State
• Lime and Fertilizer Recommendations for the Various Crops of Tennessee - University of Tennessee
• Soil Fertility & Crop Nutrition - Ontario Ministry of Agriculture and Food
• World Fertilizer Use Manual - International Fertilizer Industry Association
• Potassium Recommendations for Field Crops in New York - Cornell University
• Lime and Nutrient Recommendations - Kentucky Cooperative Extension Service 2004-2005
• Fertilizer Recommendations for Agronomic Crops in Minnesota -University of Minnesota Extension Service
• Tri-State Fertilizer Recommendations for Corn, Soybeans, Wheat and Alfalfa - Ohio State University Extension
• 2005 North Carolina Agricultural Chemicals Manual - NC State University
• Potassium Fertilizer Application In Crop Production - Alberta Government
• Providing Flexibility in Phosphorous and Potassium Fertilizer Recommendations - Potash & Phosphate Institute
• The Growing Potassium Problem - Potash & Phosphate Institute
• Nutrient Management for Commercial Fruit & Vegetable Crops in Minnesota - University of Minnesota Extension Service
• Nutrient Management Opportunities for Crops and Forages - Potash & Phosphate Institute

Alfalfa

• Fertilizer Requirements of Irrigated Alfalfa - Alberta Government
• Potassium Fertilizer for Alfalfa - - - how much, what source and when? - University of Wisconsin-Extension
• Fertility Management of Irrigated Alfalfa - Canada-Saskatchewan Irrigation Diversification Centre
• Alfalfa Diseases and Deficiencies in British Columbia - Government of British Columbia
• Enhancing Alfalfa Production through Improved Potassium Management - Purdue University
• Alfalfa Fertilization - University of Wisconsin

Barley

• Feed Barley - University of Idaho

Citrus

• A Guide to Citrus Nutritional Deficiency and Toxicity Identification - University of Florida

Canola

• Phosphorus Effects on Canola Growth and Deficiency Symptoms - Canola Council of Canada  
• Phosphorus Fertilizer Management for Canola - Canola Council of Canada  

Corn

• Fertilizer Suggestions For Corn - University of Nebraska-Lincoln
• Phosphorus and Potassium Fertilization of Corn and Soybeans Managed with No-till and Chisel-Plow Tillage - Iowa State University

Forages

• Maintaining Phosphorus & Potassium Levels - Penn State
• Fertility Management of Meadows - Ohio State
• Potassium in Forages - University of Wisconsin
• Fertilizing Alfalfa and Grasses - Colorado State University Cooperative Extension

Melons

• Fertilizing Melon Crops in Arizona - University of Arizona

Grass

• Fertilizer Management For Grass and Grass-Legume Mixtures - Utah State University

Peas

• Pea Nutrient Requirements in Alberta - Alberta Government
• Rate and Placement Effects of Phosphorus and Potassium Fertilizer on Irrigated Pea - Canada-Saskatchewan Irrigation Diversification Centre

Palms

• Potassium (K) deficiency of Palms - University of Florida

Potato

• Fertilizing Potato - North Dakota State University
• Potassium and Integrated Nutrient Management in Potato - International Potash Institute

Rice

• Fertilization of Louisiana Rice - Louisiana State University
• Rice Production in California - University of California
• Potassium Deficiency - International Rice Research Institute

Soybeans

• Nutrient Topic: Phosphorus - Iowa State University

Sugar Beet

• Fertilizing Sugar Beet in Minnesota and North Dakota - University of Minnesota
• Fertilizing Sugarbeet - University of Nebraska

Sunflower

• Manitoba Sunflower Production and Management - Manitoba Agriculture and Food

Turf/Lawn

• Nutrient Recommendations for Alabama Crops - Auburn University

Wheat

• Fertilizing Winter Wheat I - University of Nebraska-Lincoln
• Potassium Management in Wheat - Government of Alberta
• Lime, Phosphorus, Potassium, Sulfur, Manganese, Copper, Magnesium, and Calcium Management for Small Grains - North Carolina State University