Modules and Case Studies for the 4R Plant Nutrition Manual
A Publication of the International Plant Nutrition Institute (IPNI)
CHAPTER 5 - RIGHT TIME
Module 5.1-1 Wheat yield response to a late application of additional N was predicted by leaf color
Submitted by H.S. Khurana, IPNI, India, December 2011.
Module 5.1-2 Applying N in synchrony with crop demand lowered soil nitrate
Submitted by A. Tasistro, IPNI, USA, September 2011.
Module 5.1-3 Patterns of uptake for N, P, and K by grape plants in Shaanxi, China affect recommendations for application timing
Submitted by S. Li, IPNI, China, December 2011.
Module 5.1-4 Splitting the dose makes Ca more available to peanuts
Submitted by S. Li, IPNI, China, December 2011.
Module 5.1-5 Splitting N application improves grain yield and N efficiency for winter wheat
Submitted by P. He, IPNI, China, March 2013.
Module 5.1-6 Split application optimizes nitrogen use efficiency of wheat in Argentina
Submitted by F. Garcia, IPNI, Argentina, November 2013.
Module 5.1-7 Split potassium application improves cotton lint yield and economics in China
Submitted by Shutian Li, IPNI China, March 2014.
Module 5.1-8 Application timing of phosphorus is critical for rice yield in Southern U.S.
Submitted by Dr. Dustin Harrell, LSU AgCenter - Rice Research Station, USA, March 2014.
Module 5.1-9 Early nitrogen application is important for cassava yield in Hainan, China
Submitted by Shihua Tu, IPNI China, March 2014.
Module 5.2-1 High soil test levels allow flexibility in timing of P and K application
Submitted by W.M. Stewart, IPNI, USA, December 2011.
Module 5.3-1 Spring applied N increases N recovery and profit for corn in southern Minnesota
Submitted by W.M. Stewart, IPNI, USA, December 2011.
Module 5.3-2 Timing broadcast phosphorus fertilizer applications can help protect Lake Erie
Submitted by T.W. Bruulsema, IPNI, Canada, May 2013.
