Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Remediation Of Volcanic Ash Soils In Managing And Improving Their Sustainable Productivity In The Agricultural Area The Second Year Of The Two Years Plan

Volcanic ash soils considered as a fertile soils with variable charge which tend to impoverish due to be managed not as their natural behaviour. Remediation this soils with high negative charge materials like silicate and organic mattter aims block the positive charge, realease the P-retention, and increase their negative charge in managing them as their natural characteristics. The objectives of this research were to the influence of explore the slag steel (silicate) and bokashi of husk (organic matter) to some soils characteristics and their respons to corn, red chilly and broccoli. The treatments were arranged in Randomized Block Designed in factorial pattern, consisted of two factors. The first factor was steel slag, and the second factor was the bokashi of husk, consisted of four level : 0, 2.5, 5.0 and 7.5 % of soil weight percentage respectively, and be repeated twice, brought a combination of 4 x 4 x 2 treatments, and were incubated for four months. Three series of treatments were arranged for corn, red chilly and broccoli, made the whole treatments of 4 x 4 x 2 x 3. The soils in every treatments were analysed after incubation and after vegetative periodes. The result informed that the treatments interacted significantly in influencing the soil physical and chemical characteristics. The treatments also interacted significantly in the yields of corn, red chilly and broccoli. The treatments decreased the P retention and increased the P availability, pH, CEC, increased the stability aggregate, permeability, and water availability, and decreased the bulk desity. The best combination in increasing and decreasing the parameters were differerents, therefore further research is needed to fix the best combination to have the best result.