Titonia Utilization and The Rest Of Soybean Harvest In The Alternative As Fertilizer Ultisol Fertility Improvement And Soybean Crop Production

Abstract

Utilization Titonia and soybean crop residues (straw soybean) as compost, is one
alternative fertilizer to improve soil fertility Ultisol. This study aimed to determine
the effect of a mixture of compost and straw Titonia soy, lime and fertilizers in
improving soil fertility and soybean crop production. The research was conducted
at experimental field LimauManis and laboratory analysis conducted at the
Laboratory P3IN Andalas University, Padang. Research using Random Design
(RBD), which consists of 10 treatments with 3 replications were tested. The results
showed that administration of lime, compost and fertilizers give effect to the
chemical characteristics Ultisol namely against soil pH value, the content of N, P
and K soil. The provision of artificial fertilizers as much as 50% of the soybean
crop needs, provide higher impact than that of artificial fertilizers as much as 25%
of the increase in soil fertility and the growth and production of soybean plants.
Production of dry seeds of soybean highest weight obtained amounted to 1.85 tons /
ha in the treatment of lime dolomite 500 kg / ha + compost mixture (5 tons
Titonia/ha with 5 tons of soybean straw/ha) + NK fertilizers by 50% of the soybean
crop needs (treatment G).