Pakistan Journal of Botany · 2010 · 25 citations · 10 references
AgricultureAgronomyCrop SciencesCrop ManagementCrop ProductionNutrient ManagementCrop NutritionFertilizer ManagementNitrogen ManagementNitrogen NutritionNutrient Use EfficiencyVegetable Crop ProductionCrop Yield ImprovementCrop YieldsFertilizationNitrate AccumulationNitrate UptakeNitrogen Effects On YieldNitrogen Fertilization EffectsNitrogen Fertilizer Management
carota L. cv. T29). Treatments consisted of a control, 100, 150 and 200 kg N ha -1 . Significantly higher yields of carrot and okra were recorded at 150 kg N ha -1 . Nitrate concentration in both increased (> 35 to 200%) with increasing N. An excessive nitrate accumulation in both was recorded at 200 kg N ha -1 . Okra had 1.7 times higher nitrate accumulation than carrot. Early season okra had a significantly higher nitrate (~10%) than late season. Gross income and profitable return responded quadratically with increasing N. Results suggest that N fertilization of carrot and okra at 150 kg N ha -1 is optimum for economical yields with less accumulation of nitrate in vegetables.
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