FERTILIZER PLACEMENT AFFECTS GROWTH, FRUIT YIELD, AND ELEMENTAL CONCENTRATIONS AND CONTENTS OF TOMATO PLANTS

The effects of fertilizer placement on growth and nutrient uptake of 'Count II' tomatoes (Lycopersicon esculentum Mill.) were evaluated in a 3-year study. Fertilizer was applied broadcast at two rates or banded in two bands at two widths or in four bands, or applied in combinations of sidedressing or broadcasting with banding of N, P, and K at 56, 112, or 224 kg.ha-1 each. Total fruit yield for the 112 kg.ha-1 banded treatment was 24% higher than that for the same rate broadcast and similar to yield for 224 kg.ha-1 broadcast. Treatments involving combined placements, wider bands, or four bands produced yields similar to that for 112 kg.ha-1 banded, but the 56 kg.ha-1 banded with two 56 kg.ha-1 sidedressings had the highest yield. Leaf concentrations and plant contents of N, P, and K and percentage recovery of quantities applied were generally higher in treatments involving banding or sidedressing when compared to broadcasting. Leaf Mn was much higher in banded or sidedressed than for broadcast treatments but was lower when 112 kg.ha-1 was applied in four bands than in two. Only with Mg and Mn were leaf concentrations and plant contents highly correlated. With 112 kg.ha-1 banded, 31.2% of the N, 5.8% of the P, and 44.7% of the K applied were taken up, compared to 12.5%, 2.3%, and 17.2%, respectively, for double this rate broadcast.