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Studies on mineral nutrition in maize. 2. Effect of measuring rates of N, P and K on growth, yield and mineral composition of cultivar Piranao in controlled conditions



Studies on mineral nutrition in maize. 2. Effect of measuring rates of N, P and K on growth, yield and mineral composition of cultivar Piranao in controlled conditions



Anais da Escola Superior de Agricultura "Luiz de Queiroz" 33: 479-499



In maize Piranao grown in nutrient sol. with 5 levels of N, P and K there was a linear increase in DM production with increasing N conc. High levels of nitrate reductase activity indicated that the should respond to applied N. Asymptotic response curves were found for both P and K. The DM increase in roots tended to level off at lower conc. than the increase in aerial parts.

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