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Effects of Application of Two Organomineral Fertilizers on Nutrient Leaching Losses and Wheat Crop

^a Departamento de Cristalografía, Mineralogía y Química Agrícola, EUITA, Universidad de Sevilla, Crta de Utrera, km. 1, E-41013, Sevilla, Spain
^b Departamento de Química Agrícola y Edafología, Universidad de Córdoba, Campus de Rabanales, Edificio C-3, Crta N-IV-a, km 396, E-14014 Córdoba, Spain

View larger version (13K): [in a new window]   Fig. 1. Design of the lysimeters.

View larger version (27K): [in a new window]   Fig. 2. Nitrogen losses (kg ha–1) in different inorganic forms from the soils. The results are obtained by average through the water collected in each phenological state for 3 yr. Error bars represent the standard error. OMF, organomineral fertilizer; O+IF, organic + inorganic fertilizer mixture.

View larger version (27K): [in a new window]   Fig. 3. Losses (kg ha–1) in different macronutrients forms from the soils. The results are obtained by average through the water collected in each phenological state for 3 yr. Error bars represent the standard error. OMF, organomineral fertilizer; O+IF, organic + inorganic fertilizer mixture.

View larger version (24K): [in a new window]   Fig. 4. Nitrogen/P ratios for the different treatments used. The results are obtained by average through the water collected in each phenological state for 3 yr. Error bars represent the standard error. OMF, organomineral fertilizer; O+IF, organic + inorganic fertilizer mixture.

View larger version (19K): [in a new window]   Fig. 5. Iron and Mn contents (kg ha–1) in the leachates soils. The results are obtained by average through the water collected in the each one phenological state for 3 yr. Error bars represent the standard error. OMF, organomineral fertilizer; O+IF, organic + inorganic fertilizer mixture.