April 30, 2018   
  Issue 1  

Prepared by

Paul Kassel

Extension Field Agronomist



(712) 262-2264

Email: kassel@iastate.edu 



Serving Clay, Buena Vista, Dickinson, Emmet, Hancock, Kossuth, Palo Alto, Pocahontas, Sac and Winnebago Counties



The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Many materials can be made available in alternative formats for ADA clients. To file a complaint of discrimination, write USDA, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call 202-720-5964.


The Iowa State University Extension and Outreach Policies Page.  


























Corn Planting date. The following data is from one year of a date of planting study from the ISU Northern Farm at Kanawha. This data should be considered a snapshot of the effects of planting date on corn yields and grain moisture at harvest. Other planting date studies in northern Iowa show similar results.
The three corn hybrids are 95 day, 104 day and 109 day.
Plant date             P9526           P0407               P0987                        average
                        yield    H20     yield    H2O    yield    H2O                yield    H2O
                        bu/a     %         bu/a     %         bu/a     %                     bu/a     %
4/17/15            184      13.9     182      14.7     207      15.5                 191      14.7
5/13/15            179      14.5     169      15.0     196      16.7                 181      15.4
The net effect of a mid-April corn planting date compared to mid- May corn planting date:
-   Corn yields decreased about 0.4 bu/acre/day or 10 bu/a.
-   Corn grain moisture increased 0.7 point.
-   Later maturity hybrids generally performed better than earlier maturity hybrids.
Dicamba training. Persons who plan to apply Engenia, Xtendimax or FeXapan need to have a private pesticide applicator certification and need to fulfill the dicamba training requirement.
Online training for dicamba application is available. This training takes about 90 minutes and must be completed in one session.
Soil moisture The figures below are the actual rainfall for the Northwest, North Central and West Central Crop Reporting Districts (CRD). The fall dates are after the crop was mature and before soils were frozen last fall. About 80% of this rainfall could be expected to contribute to soil moisture reserves.
Therefore, there is adequate soil moisture as spring field work begins. Read more about soil moisture this spring here.
CRD                9/15 - 12/15/2017                   4/1 - 4/23/2018           Total
                        --------------------------rainfall, inches -------------------------
NW                 7.9                                                       2.5                   10.4
NC                  8.9                                                       3.2                   12.1
WC                  8.8                                                       1.6                   10.4



Prepared by Paul Kassel, Extension Field Agronomist

Phone: (712) 262-2264, Email: kassel@iastate.edu