-Drill 3 to 4 live seeds per foot about 1/2 inch deep in 36 to 42 inch rows. This will give a live seeding rate of about 4 lb/acre. Isolate the seed field from other Crotalaria plants.
-Test soil and apply fertilizer and amendments per recommendations (broadcast before planting or banded next to seed at planting).
-Irrigate if needed until about 75% of plants are flowering (usually occurs at end of the third month). Stop irrigating after the 75% bloom stage. ‘Tropic Sun’ is easily threshed when dry. To enable the plants to dry naturally, time the planting so that flowering, seed set, and harvest occur during the dry season.
-Cultivate as needed to control weeds. Fields should be weed free at harvest to prevent contamination of crop. Remove any wild Crotalaria before harvest.
-Combine when seeds rattle in the pods, about 5 months from planting. Raise the combine header as high as possible without leaving seed pods on the plants (which prevents excess straw from slowing combine). Initially set the concave clearance at 1/8 to 3/16 inch and the cylinder speed at 1150 to 1200 RPM. Adjust as needed according to crop conditions.
-When seed crop is ready for harvest, the plants should be dry and self-defoliated. If crop is still green, desiccate by spraying with an approved desiccant 1-2 weeks before harvest.
-Clean seed with standard commercial seed-cleaning equipment. Dry the combined material before cleaning.
-If commercial seed-drying and storage facilities are available, dry seed to below 10% moisture and store at low temperature and humidity.
-Seed yields have ranged from 500 of over 2200 lb/ac, varying with environmental conditions and cultural practices.
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