Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Trend of Soil Fertility in the Main Farmland of Hebei Province

LIU Ke-tong ( Hebei Center Station of Soil and Fertilizer,Shijiazhuang 050021 ,China)  
Location monitoring of the soil fertility of the main f ar mland in Hebei had been done in 7 years from 1998 to 2004.The results showed th e contents of organic matter,total N and available P in arable soil increased co mpared with the data given in the second soil general investigation in 1989 and the available K decreased;Organic matter,total N,available P and available K acc umulated;The imperfect fertilization resulted in N surplus,P accumulation,half a nd half K surplus and shortage.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved