Evergreen agriculture: crops and trees

What if growing maize under trees – really under trees, under the canopy – improved yields by 280 per cent? It did in Malawi. Even if this practice doesn’t translate well to developed world agriculture, the principles of Evergreen Agriculture can.

Matt at Muddy Green takes a look at Evergreen agriculture: crops and trees, a different kind of agroforestry. I’ve always imagined that agroforestry was more about alley cropping or the like, but this idea of planting under the trees seems rather interesting and rather successful, at least in places where the trees are bare during another crop’s growing season.

Giant southern curled mustard in the Traditional Croplands

I couldn’t identify one of the plants in the Traditional Croplands exhibit at the National Museum of the American Indian, but a quick post on their Facebook page solved the puzzle. Here’s the plant.

It turns out to be Giant Southern Curled Mustard, which GRIN suggests is Brassica juncea subsp. integrifolia var. crispifolia. This is described as an “old southern favourite,” or words to that effect, by many of the heirloom seed merchants I consulted online. There is also an ethnobotanical record online of the species being used by Native Americans, but only as a medicinal, at least in the book I was able to consult. Perhaps it is a relatively recent adoption.