Man, food, and environmental interrelationships.
D000383:Agriculture; D003906:Developing Countries; D004463:Ecology; D004467:Economics; D004777:Environment; D005308:Fertilizers / Q000600:supply & distribution; D005523:Food Supply; D006801:Humans; D006815:Hunger; D009748:Nutrition Disorders; D011057:Politics; D011157:Population Dynamics; D012959:Socioeconomic Factors
D005308:Fertilizers