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Published in Agron J 99:1548-1558 (2007)
DOI: 10.2134/agronj2007.0012
© 2007 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Tillage and Nitrogen Rate on Corn Yield and Nitrogen and Phosphorus Uptake in a Corn-Soybean Rotation

Mahdi Al-Kaisi* and David Kwaw-Mensah

Dep. of Agronomy, Iowa State Univ., Ames, IA 50011-1010


Figure 1
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  		Fig. 1. Fall corn stalk NO3–N concentration as a function of N rate of manure and fertilizer treatments with three tillage systems over 3 yr.

 

Figure 2
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  		Fig. 2. Late spring soil NO3–N concentration as a function of N rate of manure and fertilizer treatments with three tillage systems over 3 yr.

 




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