Nitrogen fertilizers for corn

Lack of nitrogen limits corn production on most Iowa soils. Many Iowa farmers can use nitrogen fertilizer profitably, our experiments show. As the supply increases, much more nitrogen fertilizer will be used— on a larger number of acres and at higher rates per acre. Many of you have used nitrogen fertilizer on corn. But many more of you will be using nitrogen in the future. The Iowa Agricultural Experiment Station has conducted over 200 experiments with nitrogen fertilizer on cornfields over the state since 1943. It is the purpose of this bulletin to give you the information gathered from these experiments along with pointers to help you use nitrogen profitably on your cornfields

Don\u27t Starve Your Corn

You\u27ll be money ahead, especially this year. If you give your corn enough food to grow on

Nitrogen Carry-Over? More Than You Think!

Many farmers believe nitrogen fertilizer is rapidly lost from the soil. In some areas it is. But 4 years of tests in Iowa have shown that both nitrogen carry-over and resulting increased yields may be greater than you expect

You Can Hasten Corn Maturity!

You can hasten the maturity of your corn in many years by the use of better soil fertility practices- such as improved crop rotations, manure and fertilizers. This hastened maturity is especially important when a cold, wet season delays planting or slows down early growth, or when there\u27s an early freeze before the corn is mautre

Carryover Fertilizer- How Much?

What happens to the fertilizer you apply? Usually, several things

Top-Dress Your Legume Meadow

Top-dressing phosphate or potash fertilizers isn\u27t a substitute for good fertilizer practices at seeding time, but in many cases it will pay dividends

How Much Fertilizer for Corn?

Support prices for corn are high and certain. Many Iowa farmers could profitably push their corn yields up to 100 to 125 bushels per acre in favorable seasons. Here\u27s what heavy fertilizer applications can do

Your Corn May Need Potassium

Shortages od potassium in Iowa soils aren\u27t as widespread as those for nitrogen and phosphorus. But deficiences are common, and severe in certain areas, Here\u27s the Iowa situation and some help in finding out the needs of your corn

P and K Fertilizers for Corn - How to Apply

More Iowa corn acres could be fertilized profitably with phosphorus and potassium. Both hill (row) and broadcast application have their place. Here\u27s what research tells us about methods of application