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

一再困擾

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.

音樂等

adroit

incite

Harrowing

謙虛的人

過度

仔細閱讀