Nutrient Deficiencies Late in the Season Peanut Notes No. 105 2018

— 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 ▲

Excessive rain can affect pH and availability of nutrients for peanut and other crops. Limited data exists on how to correct these problems. Within the past few weeks we have received questions about copper, calcium and potassium as well as questions about nitrogen-deficient peanuts and those that might be yellowing in general. I have recommended ½ the normal rate of gypsum within the past week and in 2017 growers applied additional potash after major rains. For all of these situations a response most likely will be minimal, although many peanuts were planted in late May and into June in 2018, and those peanuts have potential to benefit from a corrective action. We do not have a general understanding of how much rain it takes to move elements through the soil profile with respect to a crop response, especially when trying to tie response to growth stage. Certainly soil characteristics influence this as much as the amount and intensity of rain. Is one 3-5 inch rain enough to cause a problem? Most likely not, as much of that will run off of the field. What about two weeks where we get a cumulative amount of 10 inches or more? How about one 8-10 inch deluge? The last two scenarios are where corrective action might be beneficial but most likely only when it happens much earlier in the season than now.

My suggestion is that going into the week of August 13 there is little value in adding additional fertilizer to peanut. Most peanuts are about 4-6 weeks from digging and it will be a challenge to change fertility and plant nutrition in a positive way at this point in time.