Effects of Twin-Row Spacing on Corn Silage Growth Development and Yield
Overview
This literature review examines the agronomic effects of twin-row spacing (two rows 7.5 inches apart on 30-inch centers) compared to traditional 30-inch row spacing for corn silage production. The paper synthesizes research findings on yield, forage quality, weed control, and plant development, noting that while most studies show positive benefits for twin-row systems, advantages vary considerably across different studies and growing conditions.
What this literature review covers
- Introduction and background on row spacing practices in corn production
- Literature review of twin-row spacing effects on plant density, height, forage quality, and yield
- Analysis of Jones's 2008 Shenandoah Valley study comparing spacing configurations
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Effects of Twin-Row Spacing on Corn Silage Growth Development and Yield
Many corn producers have started experimenting with narrower spacing configurations to realize improved yields and other agronomic benefits. One recent development in row spacing methods is the "30-inch twin" rows (two rows 7.5" inches apart and off the 30-inch centers). Twin rows are advantageous because producers do not have to modify their cultivation equipment: the traditional 30-inch row heads can be employed to plant and harvest twin rows. This essay will review systemic literature on the advantages of twin-row spacing on corn silage growth development and yield.
There has been a wholesale switch from cotton production in America to corn and soybeans. The declining profitability of cotton has seen more farmers in the Mid-South region planting corn for grain and silage. However, the distance between corn rows is largely based on cotton production practices. Farmers have used wider rows to facilitate mechanical cultivation and complete weed control. However, cultivation equipment and herbicide development advances have enabled narrower row plantings (Sangoi et al.). The effect of twin-row spacing on yield results, forage quality, weed control, and plant development compared to the traditional 30-inch rows has been the subject of several studies. Various researchers have determined that a twin-row system allows flexibility in applying in-season crop inputs and harvesting corn for forage or grain.
However, while most research findings indicate generally positive yield and agronomic benefits, the specific advantages of twin-row spacing over conventional row spacing vary from study to study.