Overview

The Clover Selection Tool section of MatchClover is a Decision Support Tool for selecting the “best” clover for your location's climate and soil conditions, and your intended use and management level.  Several choices within each section are provided. After choices have been made, the clovers suitable for your conditions are identified.

 

Clover Selection Flowchart

The following flowchart provides the steps involved in selecting an appropriate clover species. 

1.  Identify Your Location

Identify your location by latitude, longitude, and elevation by Searching Google Maps and copying values returned from you cursor click; e.g. 44°32'57.7"N 123°20'55.5"W. 

2.  Characterize Your Location

Characterizing climatic and soil conditions involves defining the coldest and hottest temperatures and the annual precipitation. Defining soil conditions include assessing pH, drainage, and salinity. 

Climate: Characterizing coldest temperatures is based on the USDA Plant Hardiness Zone map. This uses average annual extreme minimum temperature to define each zone. Identify your PHZ from the above-linked map; e.g. select Oregon as state, enter 97330 as zipcode; zone is identified as 8b: 15-20 °F, -9.4 to -6.7 °C. 

Dropdown menu choices: USDA Plant Hardiness Zone: 26 categories, from 1 a through 13b; with corresponding temperature ranges

PRISM Group 30-year normal July mean maximum temperature grids are used for hot temperatures; e.g. xxxxx

Dropdown menu choices: July Mean Max Temp: 12 categories, from 8-16 C through 38-46 C; and F equivalent

PRISM Group 30-year normal precipitation grids are used to define annual precipitation for each location; e.g. xxxxx

Dropdown menu choices: Annual Precipitation: 19 categories, from <4 inches, mm also, to >160

Soil: Characterizing soil pH, drainage class, and salinity is based on the USDA NRCS SSURGO soil database; e.g. xxxxx

Dropdown menu choices for the following .....

pH (1:1 H2O): 7 classes - (1) Extremely acid, 3.5 – 4.4; (2) Very strongly acid, 4.5 – 5.0; (3) Strongly acid, 5.1 – 5.5; (4) Moderately acid, 5.6 – 6.0; (5) Slightly acid, 6.1 – 6.5; (6) Neutral, 6.6 – 7.3; (7) Slightly alkaline, 7.4 – 7.8.

Drainage class: 7 classes - (1) VPD, (2) PD, (3) SPD, (4) MWD, (5) WD, (6) SED, (7) ED

Salinity (dS/m): 5 classes - (1) 0 < 2 Non-saline;  (2) 2 < 4, Very slightly saline; (3) 4 < 8, Slightly saline;  (4) 8 < 16, Moderately saline; (5) ≥ 16 Strongly saline

3.  Define Your Intended Use

Intended Use: Choices include annual, short-term, or long crop rotations, and using monocultures or mixtures for hay or silage, grazing, soil improvement (green manure), soil protection (cover crop),  pollinators, or beautification.

Dropdown choices.....

Perennation: annual, short rotation perennial, or long rotation perennial

Composition: monoculture or mixture

Intended uses: one or more of the following 7 options - hay, silage, graing, green manure, cover crop, pollinator, beautification

4.  Define Your Management Level

Management Level: Choices include optimal (best management practices, moderate, or minimal levels of input).

Dropdown choices.....Optimal, Moderate, Minimal

5.  Search Database for Matches

Species Characteristics for Matching: Once conditions, intended uses, and management level choices have been made, climate tolerances, soil tolerances, suitability for various uses and management level matches will be made by comparing with the species database of qualitative and quantitative characteristics. Those species meeting conditions are identified as suitable matches.

DEVELOP TABLE OF SPECIES WITH ALIGNMENT WITH THE ABOVE DROPDOWN OPTIONS; WRITE CODE FOR TABLE LOOK-UP AND REPORTING OUT

6.  Select Best Matching Clover

Optimizing the selection process is accomplished by reviewing additional species information found in the individual species pages and resources section. Other considerations include availability of seed and previous experience in establishing and managing the proposed species.

DEVELOP COMMENTS FOR EACH SPECIES RECOMMENDED AS COMPLEMENT TO MATCH INDICATION