APA (7th ed.) Citation
Liu, S. (2012). Mineral nitrogen in spring in two cropping systems with permanent nitrogen supply. SLU/Dept. of Biosystems and Technology (from 130101).
Chicago Style (17th ed.) Citation
Liu, Su. Mineral Nitrogen in Spring in Two Cropping Systems with Permanent Nitrogen Supply. SLU/Dept. of Biosystems and Technology (from 130101), 2012.
MLA (9th ed.) Citation
Liu, Su. Mineral Nitrogen in Spring in Two Cropping Systems with Permanent Nitrogen Supply. SLU/Dept. of Biosystems and Technology (from 130101), 2012.
Warning: These citations may not always be 100% accurate.