Illinois study shows yield advantage with strip-till
(Above Executive Summary provided by Laura Gentry, PhD.)
Comments/Observations by Orthman Soil Science Agronomist, Michael Petersen:
As we observe and evaluate this data set that Gentry and Below studied several key points that come up before growers minds as they evaluate the validity of strip-tillage, rotational changes, hybrids, fertility programs even in a year like 2013 when the spring was wet and planting was delayed.
Please note in the supplied table the colored cells; yellow highlighted cells depict in the Corn-Soybean rotation portion of the Gentry-Below studies in the High Tech plots in which all practices are employed, incl: P-K-S etc fertilizer added precisely, high-sustainable N rates employed, best hybrids (with insect, herbicide resistant, day length, etc), higher seeding populations, and fungicides applied at premium time.
In orange cells the additional P-K-S etc fertility is subtracted.
In the blue cells the better hybrid selection is taken out and standard hybrid selected.
Much the same as what we have observed at the Orthman Research Farm near Lexington, Nebraska – precision tillage offers a slightly better yield advantage, which along with savings in fuel, time, and other costs – improves profit margins.
Lastly, in the last line of the table, precision tillage results in the averages Continuous Corn/Retained with Strip-Tillage compared to Conventional Tillage (second left column) an advantage leans to Strip-Till.
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