For tomato manufacture, good tillage
is crucial for sufficient soil running and optimal yields. Land grounding
should involve enough tillage operations to make the soil suitable for seedling
or transplant organization and to provide the best soil organization for root
growth and development. The extent to which the root systems of tomato plants
develop is unfair by the soil profile. Root development will be restricted if
there is a hard pan, compacted layer or heavy clay zone. Tomatoes are
considered to be bottomless rooted and, under sympathetic conditions, some
roots will grow to a depth of as much as 10 feet. The preponderance of roots,
however, will be in the upper 12 to 24 inches of soil. Since root development
is severely limited by compacted soil, proper land preparation should eliminate
or significantly reduce soil compaction and hard pans. Tillage systems using
the moldboard (“bottom” or “turning”) plow prepare the greatest soil volume
conducive to vigorous root growth. This allows the expansion of more wide root
systems, which can more efficiently access nutrients and water in the soil. Dis king
after moldboard plowing tends to re-compact the soil and should be avoided.
Compaction pans are in attendance in many soils. They are formed principally by
tackle and are normally located at or just below plow depths. Although
compaction pans may be only a few inches thick, their inhibitory property on
root growth can particularly reduce tomato yields.
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