. Efficient use of nitrogen on crop land in the Northeast . 30 7 15 22 29 5 12 JUNE JULY JULY JULY JULY AUG AUG Figure 4. Concentration of glutamine in table beet roots. See Figure 2 for explanation of symbols. ( Peck, New York) Plants that received no fertilizer N showed a linear increase in sugar from 25% dry basis in late June to 57% on August 12. At the other extreme, plants that received 330 kg or more fertilizer N had only 47 to 50% total sugar at harvest on August 12. An inverse relation was found between the amount of glutamine and sugar present in the roots at harvest on August 12
. Efficient use of nitrogen on crop land in the Northeast . 30 7 15 22 29 5 12 JUNE JULY JULY JULY JULY AUG AUG Figure 4. Concentration of glutamine in table beet roots. See Figure 2 for explanation of symbols. ( Peck, New York) Plants that received no fertilizer N showed a linear increase in sugar from 25% dry basis in late June to 57% on August 12. At the other extreme, plants that received 330 kg or more fertilizer N had only 47 to 50% total sugar at harvest on August 12. An inverse relation was found between the amount of glutamine and sugar present in the roots at harvest on August 12. One example of this relation is shown in Figure 5, where the concen- iij S (3 cs I- u o a: UJ a. LO
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