Fertility

pH: The traditional recommended pH range for liming peanut land is 5.8 - 6.2. However given the critical need for Ca in virginia type peanuts we recommend a bias toward 6.2. A 6.4 pH increases the probability of Mn or B deficiency, but decreases potential Zn toxicity problems. Mn or B needs can be met with foliar application where needed.

N and Inoculants: Peanut is a legume and as such can get most of its N needs from nitrogen-fixing bacteria (Bradyrhizobium) colonizing the plant’s roots. To provide these needed bacteria you absolutely must inoculate all “new” peanut land, and should also inoculate land that has been out of peanut production for 3 years. Use a liquid in-furrow inoculant. In-furrow granular inoculants are less effective than liquids and usually stop-up in the delivery tube. Seed treatment inoculants have much lower bacterial counts and have not been as consistent as in-furrow liquids. Inoculants are living organisms; treat them with care. Make sure the inoculant is not out-of-date.

For more fertility guidelines, see the Production Guide or the Fertility Checklist, or contact James Camberato, 843-662-3526, jcmbrt@clemson.edu or Jay Chapin, 803-284-3343, jchapin@clemson.edu