Table 3: Foliar concentrations of nutrients and Al in Jeffrey pine seedlings during the second and fourth growing seasons as affected by conventional, controlled release, and organic fertilizer formulations.a

Formulation and application rateMacronutrient concentration (%)Micronutrient concentration (μg g−1)Al (μg g−1)
NPKCaMgSFeMnZnCuB

Second posttreatment season:
Viking 21-7-14
 25 g1.11cd0.15a0.96ab0.24b0.09bc0.22abcd65b684b36bc5.0abc54b176b
 50 g1.18bcd0.15a0.98ab0.21b0.09bc0.18cd58b458b31cd5.6ab37b132b
 75 g1.27abc0.15a1.07ab0.18b0.09bc0.24abc57b502b30cd5.8ab45b143b
 100 g1.38ab0.15a0.95b0.20b0.08c0.24abc130b442b31cd5.8ab37b113b
Free Flow 29-3-4
 25 g1.22abcd0.16a0.96ab0.22b0.10ab0.20bcd63b494b29cd5.2abc39b152b
 50 g1.28abc0.16a1.04ab0.19b0.09bc0.19cd61b381b29cd5.2abc35b123b
 75 g1.40a0.16a0.95b0.19b0.09bc0.18cd59b371b27d5.8ab32b122b
 100 g1.35ab0.16a1.02ab0.19b0.09bc0.17d65b454b32bcd5.4ab35b116b
High N 22-4-6
 25 g1.07d0.15a0.97ab0.29b0.09bc0.22abcd82b737b40b5.4ab56b202b
 50 g1.23abcd0.17a1.07ab0.20b0.10ab0.24abc66b511b31cd5.4ab39b142b
 75 g1.23abcd0.17a1.11a0.20b0.09bc0.19cd61b501b32bcd5.3abc41b141b
 100 g1.26abc0.16a0.98ab0.23b0.09bc0.19cd54b433b31cd6.6a35b118b
Milorganite 6-2-0
  100 g1.08d0.17a1.11a0.17b0.09bc0.22abcd59b550b25d5.2abc37b170b
  200 g1.14bcd0.15a1.01ab0.29b0.10ab0.27ab70b788b33bcd4.4bc46b209b
  300 g1.16bcd0.15a0.96ab0.24b0.10ab0.24abc67b534b32bcd5.8ab44b178b
  400 g1.25abc0.16a1.06ab0.21b0.10ab0.24abc61b624b31cd5.0abc46b161b
Nonfertilized0.73e0.08b0.68c0.46a0.11a0.28a295a1491a47a3.2c91a460a

Fourth posttreatment season:
Viking 21-7-14
  25 g1.12c0.16ab1.02ab0.25b0.13ab0.24bc56bcd691ab46abc8.8b42ab251b
  50 g1.16c0.17a1.11a0.22b0.12abc0.26abc87ab576ab48abc8.1b39b183b
 75 g1.26bc0.18a1.16a0.20b0.11abc0.22bc49bcd517b39c8.4b42ab180b
 100 g1.30bc0.17a1.12a0.19b0.12abc0.23bc54bcd537b42bc8.6b34b185b
Free Flow 29-3-4
 25 g1.24bc0.16ab1.06ab0.21b0.12abc0.23bc82abc556ab40c7.8b44ab211b
 50 g1.32bc0.17a1.10ab0.18b0.11abc0.22bc32de423b42bc8.4b27b144b
 75 g1.43ab0.18a1.14a0.21b0.12abc0.23bc45bcd426b47abc8.4b33b183b
 100 g1.46ab0.15ab1.02ab0.18b0.11abc0.20c49bcd560ab36c6.8b31b172b
High N 22-4-6
  25 g1.38abc0.17a1.07ab0.24b0.12abc0.24bc74abc700ab54ab8.8b46ab254b
  50 g1.41ab0.19a1.11a0.18b0.11abc0.22bc49bcd539b37c6.4b29b159b
  75 g1.46ab0.17a1.14a0.18b0.10bc0.21bc30e493b36c5.8b30b154b
 100 g1.51a0.17a1.05ab0.17b0.09c0.20c70abc392b37c6.0b26b138b
Milorganite 6-2-0
 100 g1.10c0.15ab1.08ab0.20b0.12abc0.23bc41cde620ab37c6.6b33b185b
 200 g1.17c0.17a1.11a0.22b0.12abc0.30ab61bcd650ab41c9.1b40ab221b
 300 g1.22bc0.16ab1.08ab0.22b0.12abc0.27abc52bcd606ab41c8.2b41ab203b
 400 g1.29bc0.16ab1.06ab0.22b0.13ab0.23bc71abc715ab46abc5.6b49ab219b
Nonfertilized0.75d0.12b0.95b0.33a0.14a0.34a92a999a56a16.8a65a381a

aWithin each element and season, means sharing a common letter do not differ significantly at according to the LSD test; for each combination of formulation and application rate.