The ins and outs of organic farming.
Goklany
Indur M
IM
D000383:Agriculture / Q000379:methods*; D018533:Biomass; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D002523:Edible Grain / Q000254:growth & development; D012987:Soil
D012987:Soil