Titlebook: Nitrogen Cycling in Ecosystems of Latin America and the Caribbean; G. P. Robertson,R. Herrera,T. Rosswall Book 1982 Martinus Nijhoff/Dr W.

忘川河

一再困扰

spondylosis

Nitrogen gains and losses in sugarcane (, sp.) agro-ecosystems on the coast of Peru,o the system . irrigation water from rivers and deep wells. 1.2% of the total N in the soil is in available form during the growing season. N extracted by the aerial part of the plants ranges from 210–246 kg N ha. crop.; .. 70% of this is removed in the harvest, and most of the remainder is lost . pre-harvest burning.

音乐等

adroit

incite

Harrowing

谦虚的人

过度

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