Fertilizer Calculator

An online tools for optimizing N-P-K fertilizer application and cost.

University Of Minnesota Extension

Offers a wealth of expertise on gardening, horticulture, farming, and many other subjects.

Nutrient Information

For Homeowners

For Farmers


State of Minnesota

Natural Resources Conservation Service

General information on soil and soil conservation.

UMN Research Analytical Laboratory

Inorganic chemical analyses on environmental samples and man-made materials for University researchers and other public service agencies.

Department of Soil, Water, and Climate

This U of MN Department has a number of researchers and experts focusing on issues related to soil, plant growth, and nutrient management.