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- W1566882136 abstract "Corn growth, grain yield and plant nutrient concentrations wereevaluated to different rates and nutrients at Balcarce. The treatmentswere: 1) 200 kg ha-1 of a fertilizer blend with N-P-K-Mg-Ca-S-Zn plus 200kg ha-1 urea-N, 2) 100 kg ha-1 of the fertilizer blend plus100 kg ha-1 urea-N,3) 66 kg ha-1 DAP (18-20-0) plus 100 kg ha-1 urea-N, and 4) Control. Thefertilizer blend and DAP were applied to corn planting and urea at V6stage. At flowering, the application of K, Ca, Mg, S and Zn did not increasephotosynthetic active radiation intercepted by the crop (86 vs 87 %,Treatments 2 and 3, respectively), chlorophyll content (53 vs 52 SPADunits, Treatments 2 and 3, respectively), and dry matter (12123 vs 12043kg ha-1, Treatments 2 and 3, respectively). At physiological maturity, K,Ca, Mg, S and Zn did not increase dry matter (18812 vs 18619 kg ha-1,Treatments 2 and 3, respectively) or grain yield (11975 vs 11985 kg ha-1,Treatments 2 and 3, respectively). At flowering, the application of K, Ca,Mg, S and Zn did not increase leaf concentrations of those nutrients(Treatments 2 vs 3). However, fertilized treatments increased Mg, S andZn leaf concentration compared to Control. Leaf nutrient concentrationindicated severe deficiencies of N, P, K and Mg even in the treatmentsfertilized with these nutrients. These results would indicate that nutrient concentration thresholds proposed in literature can not be used underconditions of southeastern Buenos Aires." @default.
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- W1566882136 date "2003-01-01" @default.
- W1566882136 modified "2023-09-24" @default.
- W1566882136 title "Respuesta del cultivo de maíz irrigado al agregado de macronutrientes y zinc y su concentración en planta en Balcarce" @default.
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