What About Continuous Corn?

Interest in continuous corn in Iowa has been g rowing for several years. And increasing numbers of farmers have been trying it out on their own. Here\u27s a report on the results of our Iowa tests with continuous corn

Productivity levels of some Iowa soils

This report presents crop yield estimates for corn, soybeans, oats, and hay on 290 selected soil types and phases. These yield estimates are believed attainable as a 5-year average with the technology available in 1971 and average weather conditions.https://lib.dr.iastate.edu/specialreports/1063/thumbnail.jp

The X-ray transient XTE J1118+480: Multiwavelength observations of a low-state mini-outburst

We present multiwavelength observations of the newly discovered X-ray transient XTE J1118+480 obtained in the rising phase of the 2000 April outburst. This source is located at unusually high Galactic latitude and in a very low absorption line of sight. This made the first EUVE spectroscopy of an X-ray transient outburst possible. Together with our HST, RXTE, and UKIRT data this gives unprecedented spectral coverage. We find the source in the low hard state. The flat IR-UV spectrum appears to be a combination of optically thick disk emission and flat spectrum emission, possibly synchrotron, while at higher energies, including EUV, a typical low hard state power-law is seen. EUVE observations reveal no periodic modulation, suggesting an inclination low enough that no obscuration by the disk rim occurs. We discuss the nature of the source and this outburst and conclude that it may be more akin to mini-outbursts seen in GRO J0422+32 than to a normal X-ray transient outburst.Comment: 4 pages, 3 figures, replaced with accepted version. Uses emulateapj5.st

Improve Your Subsoil Moisture for Higher Yields

Moisture is becoming an increasingly important factor in crop production. ISU studies show farmers can save moisture for an upcoming corn crop by killing out a meadow crop early in the last year of a rotation

Different Cropping Systems Require Different Amounts and Kinds of Fertilizers

With increasing concern about pollution, it is important that fertilizers not be used in excess. Results of a series of ISU studies provide guidelines for proper fertilizer rates

Evolution of the Level lnterfluvial Divides on the Kansan Till Plain in Iowa and Missouri

The purpose of this paper is to discuss and evaluate various alternative hypotheses concerning the evolution of the level interfluvial divides on the Kansan Till plain in southern Iowa and northern Missouri. About four-fifths of the plain is dissected (3), but the undissected remnants have an almost flat surface. In contrast to this the undissected portion of the much younger surfaces of the Mankato and Cary till plains have an undulating topography with numerous closed depressions and isolated low knolls

Crop Rotations - Facts and Fiction

A wide range of cropping systems will give high corn yields. Whether or not to rotate crops may depend on the land slope. We don\u27t have all the answers but here\u27s more about these and other crop rotation facts