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Phosphorus Requirements for Tomatoes as Influenced by Placement

Field evaluations were made to determine the effectiveness of broadcast P vs P placed in a band for direct seeded tomatoes (Lycopersicon esculentum) on three soils common to South Texas and Northern Mexico. Broadcast P was ineffective in producing high yields when soil P levels were low enough that a P response was obtained. Phosphorus concentrations in young tomato plants were much higher with band P than broadcast P. Lateral distance of P placement from the seed row was critical in obtaining maximum early tomato growth. Depth of P placement was very important on clay soil but less so on sandy clay loam soil.

Key Words: Tomato nutrition • Lycopersicon esculentum

Received for publication August 29, 1969.