high margin species chosen for the layer full sun batat: 10% thyme: 10% oregano: 10% portulaca: 10% part shade acmella: 20% plantago: 10% semi shade gotu kola: 20% pouzolzia: 10% research results of profitability dry powder: ~$50k per ha dry powder + co2 extracted oil: ~$100k per ha consider clover alfalfa arachis pintoi