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- W2378636967 abstract "This paper deals with the chemical fertilizer input and soil nutrient resource in winter wheat-corn rotation system in Huantai County of Shandong Province.The results show that form 1990 to 1996,after one-ton-yield county is established in 1990,the average annual rates of nitrogen,phosphorus( P2 Os) and potassium(K2O) fertilizers are 599.4±64.8kg/hm2,211.0±26.4kg/hm2,103.6±21.2kg/hm2,respectively; and N:P2O5 :R2O ratio is 1:0.353(±0.033) :0.176 (±0.046).It is also shown that from 1990 to 1996,the average contents of soil organic matter,alkaline hydrolysable nitrogen,available phosphorus(P) and available potassium(K) are 14.6±0.3g/kg,64.2+2.9mg/kg,8.5±1.5mg/kg and 83.8±8.2mg/kg,showing that irrational structure of fertilizer input occurs in Huantai County,and we should decrease its nitrogen input,maintain current phosphorus level and increase the input of potassium fertilizer in Huantai County." @default.
- W2378636967 created "2016-06-24" @default.
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- W2378636967 date "2003-01-01" @default.
- W2378636967 modified "2023-09-25" @default.
- W2378636967 title "Chemical fertilizers input and soil nutrient resources in winter wheat-corn rotation system in Huantai County." @default.
- W2378636967 hasPublicationYear "2003" @default.
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