2017 Projects

Project: 282-16

Title: What are the Nitrogen Benefits when Interseeding Clover into Continuous Corn

Principle Investigator: Matt Ruark

Objective: 

The objectives of this study are to determine the effect of interseeding red clover on 1) corn yields in interseeded year and subsequent year, 2) response to N fertilizer in interseeded year and subsequent year, and 3) residual (post-harvest) and early season soil N content. Additionally the study will determine the growth, N content, and N derived from fixation for interseeded red clover in fall and spring.

Publications/Presentations

Francis, H.R., T.F. Ma, and M.D. Ruark. 2021. Toward a standardized statistical methodology comparing optimum nitrogen rates among management practices: A bootstrapping approach. Agricultural & Environmental Letters, 2021;6:e20045.

Smith, Moore, Ruark & Silva. 2019. Interseeding cover crops in row-cultivated corn. A4175

Francis, H.R. NITROGEN BENEFITS WHEN INTERSEEDING RED CLOVER INTO CORN, MS Thesis, UW Madison, 2020

Funding Level: $56,091
Duration: 3 year

Project: 279-15

Title: Validation of Red Clover Cover Crop Nitrogen Credits for Corn

Principle Investigator: Matt Ruark

Objective: 

1) Determine the effect of red clover (as a green manure or silage crop) and tillage on corn yield.
2) Determine the effect of red clover (as a green manure or silage crop) on corn silage yield.
3) Calculate the N credit for red clover as a function of harvest/termination and tillage used.

Publications/Presentations

Ruark et al., 2020. Quantifying the benefits of legume cover crops. 2020 Wisconsin Agribusiness Classic.https://extension.soils.wisc.edu/wcmc/quantifying-the-benefits-of-legume-cover-crops/

Funding Level: $26,372
Duration: 2 year

Project: 283-16

Title: Development of a Crop Sensor Algorithm for Nitrogen Management in Winter Wheat

Principle Investigator: Carrie Laboski

Objective:

1) Collect additional crop sensor data from winter wheat N response studies to develop a sensor algorithm for in-season N management.
2) Evaluate the effect of N application timing on yield, economic optimum N rate, N use efficiency, and profitability.
Funding Level: $135,839
Duration: 3 year

Project: 284-16

Title: Corn Hybrid Response to Starter Fertilizer in Wisconsin Soils

Principle Investigator: Joe Lauer

Objective: 

1) To evaluate the agronomic and economic responses of corn to pop-up and starter fertilizer as affected by hybrids differing for relative maturity (RM).
2) To determine the probabilities of a positive economic return associated with pop-up and
starter fertilizer, especially with longer season RM hybrids.

Publications/Presentations

Corn (Zea mays L.) hybrid relative maturity response to banded fertilizer, in preparation.

Funding Level: $41,905
Duration: 3 year