Phosphorus efficiency in long-term (15 years) wheat–maize cropping systems with various soil and climate conditions

By Xu Tang, Ju-mei Li, Yibing Ma, X. Hao, Xiuying Li. 2008

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Determining critical values of soil Olsen-P for maize and winter wheat from long-term experiments in China (2009, background): “Relationship between critical values and observed P uptake by crops The 15-year cumulative crop P uptake from NK treatments (no P application) were 158, 204 and 312 kg ha−1 for Changping, Yangling and Zhengzhou, respectively (Tang et al. 2008).”
Yield trends and nutrient budgeting under a long-term (28 years) nutrient management in rice-wheat cropping system under subtropical climatic condition. (2018, background): “Positive linear relation between the Olsen-P level in soil and P surplus might be the cause of P fertiliser accumulation (Tang et al. 2008).”
Long‐term changes in soil phosphorus status related to P budgets under maize monoculture and mineral P fertilization (2010, background): “About 100 kg ⁄ha of surplus P increased POl by 5.8 mg ⁄kg in a temperate acid soil after 3 yr (Shepherd & Withers, 1999) and by 2.3–5.7 mg ⁄kg in two Chinese long-term (15 yr) experiments (Tang et al., 2008).”