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agronomic experiments alkaloids Artemisia annua artemisinin caused Chemistry Cinchona contain crop deltoidea developing countries Digitalis Ianata Digitalis lanata Dioscorea diosgenin diploid dried Duboisia myoporoides Econ ergot farmyard manure fertilizers free from weeds fungus Future strategies Genetics germination ginseng glycosides growing growth Harvesting and processing hectare Henbane Husain hybrids hyoscine hyoscyamine Hyoscyamus muticus important Indian insect pests irrigations are required kg nitrogen kg/ha lanata leaf leaves liquorice lndia lnterculture and weed lpecac main alkaloids Medicinal Plants modern medicine nitrogen obtained from wild optimum Pakistan Pharm phosphorus Plantago ovata Podophyllum propagated through seeds Prospects for production Psyllium rainfall Rauvolfia serpentina raw material reported rich in organic roots sapogenins seedlings seeds are planted Senna sennoside serpentwood shade Singh Soil and climate species of Dioscorea split doses steroidal subtropical areas temperate areas tetraploids tonnes transplanted trees tropane tropane alkaloids tropical tuber weed control weeding and hoeing wild sources yield