Project Overview
Commodities
- Agronomic: corn
Practices
- Crop Production: cover crops, intercropping
Summary:
Background
Incorporating cover crops into row crop systems has been shown conclusively to be an economically viable, ecologically sound, and effective soil conservation and weed suppression method, both at a research and farm-scale level.
However, widespread interseeding of cover crops into a standing primary crop for general weed control and soil conservation purposes has been hindered because typical practice post-emergence interseeding requires multiple passes with specialized or highly modified equipment. Resulting cover crop performance is often mixed, with poor emergence, irregular establishment, and poor early competition with weeds especially in organic systems. Without seeing consistent results, farmers will be slow to adopt interseeding cover crops.
This project proposes:
- To simultaneously plant a corn with a mixture of shade-tolerant cover;
- To modify a no-till drill (for the cover-crops) by adding precision planting units (for the row-crop specialty corn), likely a modified Monosem twin-row, single-row or comparable precision planting unit; and
- To compare cover crop and crop yield response to four corn planting widths: 5 inches (single row) 15 inches (single row), 30 inches (single row) and 60 inches (twin-row).
UPDATED from 2020 Lessons, Revised Objectives to be Measured for Harvest of 2022:
- To plant corn into a standing, established cover via integration of prior cover crop seeding and strip tillage; and
- To modify a vertical tillage tool that can be used for appropriate cover crop seeding prior to planting.
Success would yield economic gains, reduced pesticide load, and increased soil biodiversity while reducing workload for farmers.
Project objectives:
The purpose of this grant was to investigate the feasibility of simultaneously planting corn and cover crops across various row widths for no-tillage, strip-tillage, and organic systems. The original idea was to modify a drill that could seed the cover crops immediately at the same time as a planter that planted corn to establish a stand of cover crops, ideally perennial-decumbent types, with the end goal being greater soil health, weed control, and adequate-non-competitive co-existence with an annual corn crop. Essentially, how do we create a “perennial living mulch” in a corn system that would improve biodiversity while maintaining a focus on the high-profit potential corn crop?
- To successfully establish a simultaneously interseeded specialty corn/mixed cover crop;
- To modify a no-tillage drill into an interseeder for both cover crop and row-crop planting in organic no-till and strip-till systems; and
- To compare the effects on corn yield and cover crop emergence and growth (height and biomass) of a high-density narrow row corn spacing (8.5 inches and 15 inches) versus standard (30 inch) and wide row spacing (60 inch twins).
UPDATED from 2020 Lessons, Revised Objectives to be Measured Harvest of 2022:
- To plant corn into a standing, established cover via integration of prior cover crop seeding and strip tillage;
- To modify a vertical tillage tool that can be used for appropriate cover crop seeding prior to planting; and
- To showcase the results to passersby as well as clients of our partner cooperator thru signage, photographs, videos, data collection, press releases and field days.