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Mineral Composition of Swards Containing Forage Chicory

David P. Belesky, Kenneth E. Turner, J.M. Fedders and Joyce M. Ruckle

USDA-ARS, Appalachian Farming Systems Res. Cent., 1224 Airport Road, Beaver, WV 25813, USA



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  		Fig. 1. Macronutrient (P + K + Ca + Mg + S) concentration (g kg-1) in available herbage as a function of N fertilizer (kg ha-1) and chicory in the sward. Macronutrient concentration = 0.32 (% chicory)2 - 1.78 x 10-2 (% chicory) + 31.07;

 


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  		Fig. 2. Nitrogen/S ratios as a function of N rate in Experiment 1. In 1994, ; . In 1996, ;

 


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  		Fig. 3. Nitrogen/S ratios in Experiment 2 as a function of harvest frequency and time (d) over the growing season in 1994 for 3-wk and 6-wk clipping intervals; and in 1996 for 3-wk and 6-wk clipping intervals

 


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  		Fig. 4. Calcium/P ratios in 1994 and 1996 as a function of sward composition and harvest frequency in Experiment 2. Bars at the top of each column are the standard error of the mean

 


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  		Fig. 5. The relationship of K/(Ca + Mg) on an equivalent basis in 1994 and 1996 as a function of sward composition and harvest frequency in Experiment 2

 




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