| dc.description.abstract | RONALD PANDAPOTAN MARPAUNG : Application of Humic Acid and NPK
Fertilizer Growth of Seeds of Suren ( Toona Sureni Merr) On Marginal Land,
Supervised by DENI ELFIATI and DELVIAN.
The Marginal Land in Indonesia still in very large amount. Meanwhile,
the accelerate to rehabilitate the land still very slow. The low of pH, C-Organik,
N-Total, P and K-exchangeable become the parameter of marginal land
condition. Therefore carried out research which combine acid humic and NPK
fertilizer which applied to marginal land and seen its influence to growth of seed
of suren. Research has been done in green house at Faculty Of Agriculture of
USU on March-May 2012 using completely randomized factorial design of two
factors that is concentration of humic acid ( 0%, 2.5% and 5%) and dose prular
NPK fertilizer ( 0 gr; 1 gr; 2 gr; 3 gr and 4 gr per crop). The parameters
observed were height of the plant, diameter of stem, dry wight, wide total of leaf
and ratio of root crown.
The results of research indicate that the concentration of humic acid do
not have an effect on the reality to all of the parameters except to parameter of
ratio of root crown. But dosage of NPK fertilizer have significantly effect to all of
the parameters. The combination of the concentration of humic acid and NPK
fertilizer do not have an effect on the reality to all parameter. All of the dose of
NPK fertilizer besides control have a different significantly to the growth of the
plant. Thereby, using of NPK fertilizer is good to growth of plant on marginal
land media. | en_US |
