Soil water and winter wheat prospects
In the above table, keep in mind that 2 inches of available soil water is equivalent to having moisture to a depth of one foot in a silt loam soil, since a silt loam soil holds about 2 inches of available soil water per foot. Likewise, 4 inches of available soil water means a silt loam soil is moist to a depth of 2 feet. In a sandy loam soil, 2 inches of available soil water would be moisture to a depth of roughly 1.33 feet.
The chart shows the influence of available soil water and in-season precipitation at producing long-term yield results. Having water in the fall is critical for germination, emergence, stand establishment, and vigor. Precipitation during winter is closely related with yield potential, providing for winter survival and increased soil water at the beginning of spring regrowth. Water in spring is normally most effective at increasing wheat yields if received at about boot through head extension, providing for decreased water stress at flowering and grain development.
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