Phosphorus(P)is an essential nutrient for crops,animals and humans,however,the quantity and spatial distribution of mineral P reserves are limited and uneven.There is some uncertainty about the total quantity of econo...Phosphorus(P)is an essential nutrient for crops,animals and humans,however,the quantity and spatial distribution of mineral P reserves are limited and uneven.There is some uncertainty about the total quantity of economically-extractable P reserves.Most recent evidence suggests the total global reserves could last for several hundred years or more,but most of these reserves are in northern Africa,so access to this supply could be disrupted.展开更多
文摘Phosphorus(P)is an essential nutrient for crops,animals and humans,however,the quantity and spatial distribution of mineral P reserves are limited and uneven.There is some uncertainty about the total quantity of economically-extractable P reserves.Most recent evidence suggests the total global reserves could last for several hundred years or more,but most of these reserves are in northern Africa,so access to this supply could be disrupted.