Table 5: Nitrogen rate × N application timing × variety × MH-30 interaction in 2010 for marketable yield for Russet potatoes grown on sandy loam soils in the Mid-Atlantic.

Nitrogen rate and MH-30   Goldrush       Norkotah   All at planting 2-splits 3-splits   All at planting 2-splits 3-splits kg ha−1 kg ha−1 134 no MH-30 9148 j† 13325 hij 19556 efgh 28348 abcd 32261 abc 29262 abcd 134 with MH-30 17187 fghi 17035 ghi 12237 hij 28337 abcd 32789 ab 31356 abc 268 no MH-30 24800 cdef 22615 defg 22513 defg 28601 abcd 27707 abcd 28277 abcd 268 with MH-30 17696 fghi 10815 ij 26833 cde 27239 abcde 34883 a 32250 abc LSD0.10 7724 Pr > F 0.0474

†Means with the same letter are not significantly different (P ≥ 0.10, Fisher’s Protected LSD) and any mean can be compared within the table.