Zinc in Waste Peanut Notes No. 15 2024

— Written By
en Español

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.

English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

Jordan:

We have been discussing zinc issues in peanuts at the production meetings this year. It is important to consider the amount of zinc in waste, the uniformity of zinc in waste, and the rate of waste that is applied. In a previous Peanut Note we provided a newer recommendation. If the soil pH is 6.5, it is very likely that zinc injury will be relatively minor if at all if the index is 750. We are still working towards a more concrete recommendation, but the 6.5/750 thresholds seems to be reasonable. Of course, there could be hot spots if you are using an average number for the field. Applications of waste tend to be non-uniform.

I discussed how one calculates zinc in waste and then how that information is used to make sure waste application does not render fields useless for peanut production.

Here is a part of that discussion with a link to other resources provided in an earlier Peanut Note.

Kulesza:

It’s hard to estimate how an application of zinc will affect the soil Zn-I. The most conservative estimate is to assume all of it will be available. To do this, you would divide the pounds of zinc applied per acre by 0.071 to get the increase in zinc index.

I found the conversion factor on the NCDA&CS website.

So, if you’re applying 500 lbs/ac of the first sample (4.5 lbs of Zn/ton), you’d have a maximum soil Zn-I increase of 15. Notice that the three waste analyses are very different in their zinc concentration. It’s really important to have an accurate analysis of the product that you’ll actually be applying to avoid a toxicity issue.

Read more at: Estimating Zinc Index Values