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- W2007173630 abstract "Nitrogen is important for oilseed rape production and even moderate deficiencies will substantially reduce yield and profit, but excessive N can pollute both surface and ground water. Thus, farmers are walking a thin line. In order to find the relationship between the SPAD value and the nitrogen content of oilseed rapes, a Minolta SPAD-502 Meter can be used for on-farm measurement of the N content, and then the Kjeldahl method has been used for measuring the nitrogen content of these oilseed rapes. Every leaf had 10 points SPAD value in average for measuring by SPAD, according to the area of the leaves, the points were increased or decreased. The Kjeldahl method has been used for organic nitrogen determination for over a century. Before using the Kjeldahl method to measuring the nitrogen content, all the leaves has been washed and dried. The results of these two methods has been fitted, as a result, the correlation coefficient is 0.863. Another sample was used to check if the result was perfect, the error of the forecasting value is about 7.4%. A new method for measuring the nitrogen content quickly of oilseed rapes has been found, the nitrogen content of the oilseed rape can be measured nondestructively and quickly." @default.
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- W2007173630 date "2006-09-01" @default.
- W2007173630 modified "2023-09-23" @default.
- W2007173630 title "Evaluation of the Minolta SPAD-502 meter for nitrogen management of oilseed rape" @default.
- W2007173630 doi "https://doi.org/10.1117/12.710975" @default.
- W2007173630 hasPublicationYear "2006" @default.
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