Read more Field & Forage Crops Ag Updates
on the Rutgers Plant & Pest Advisory

Plant & Pest Advisory > Field & Forage Crops

Contact Information

The points of contact between Rutgers Cooperative Extension Service and the grower & business communities are the NJ County Agricultural Agents. The agents are a tremendous source of information for both new and experienced growers.
Visit your local county extension office.

Thursday, August 2, 2012

Harvesting/Feeding/Pricing Drought Stressed Corn for Silage

Some farmers have or are considering harvesting drought stessed corn for silage in some parts of NJ. Nitrate toxicity and feeding value are of particular concern. If being sold between farmers, pricing is a question. The following publications give some useful information from other drought stressed states on how to evaluate and deal with these various aspects.Where possible, silage should be considered over haying because of the diffculty in drying the stalks/ears and the fact that nitrates decrease very little in hay in storage as compared to silage in storage. Be aware of poisonous silo gases should high Nitrate corn be ensiled and that nitrate toxicity can also occur in other forages

Zane R. Helsel

Estimating Corn Yield Before Harvest

With recent rains in some areas of NJ along with surging corn prices some farmers are axiously trying to estimate their potential yields for marketing and other purposes while those who are less fortunate need to plan for the consequences of lower yields. There are numerous ways to estimate yields but some of the basics follow. First you need to get a good estimate of plant populations with ears on the stalk. Most everyone uses 30 inch rows thus 17.5 feet of row equals 1/1000th of an acre. So walking and measuring at random thru the field or sampling specific good and bad patterns in the field will give you a good estimate of plants per acre with ears. As you go you can randomly pull off ears at the different spots you sample for plant population. If you got an average of 30 (ie 30,000 plants/acre) then select 30 random ears and husk and count the number of kernals. In really good corn with well filled kernals there are about 75-80,000 kernals/ bushel, in average corn about 85-90K and in poor corn(large popcorn size kernals) about 95-105K. If for example you had a stalk population with ears of 30,000/A, and average kernal count per ear of 400 and assumed a kernal size of 85,000/bu then you would have a yield of about 141 bu/A. Remember, the more areas of the field and the more samples you take, the better the estimates. Please see the following article for more details for estimating yields:
What about soybeans? Its too early yet to estimate those.

Zane R. Helsel