Search
Close this search box.
Search
Close this search box.

Cover Crop information map

Planting Date and Seeding Rate Effects on Sunn Hemp Biomass and Nitrogen Production for a Winter Cover Crop

Sunn hemp (Crotalaria juncea L.) is a tropical legume that produces plant biomass and nitrogen (N) quickly. Our objectives were to assess the growth of a new sunn hemp cultivar breed to produce seed in a temperate climate and determine the residual N effect on a rye (Secale cereale L.) cover crop in east-central Alabama from 2007 to 2009. Plant populations, plant height, stem diameter, biomass production, and N content were determined for two sunn hemp planting dates, following corn (Zea mays L.) and wheat (Triticum aestivum L.) harvest, across di fferent seeding rates (17, 34, 50, and 67kg/ha). Rye biomass was measured the following spring. Sunn hemp biomass production was inconsistent across planting dates, but did relate to growing degree accumulation. Nitrogenconcentrationswere inversely relatedtobiomassproduction,and subsequentNcontentscorrespondedto biomasslevels.

Click here for the full

Share it on:

Will you be attending Commodity Classic?

GO Seed will once again be attending Commodity Classic! If you’re interested in joining us for farmer led discussions on cover crops with GO Seed Director of Research and soil scientist, Dr. Shannon Cappellazzi, please email us by clicking the button below!
We hope you’ll come by our exhibit space and chat with the team, at space 2803!