1Program Study of Agroecotechnology, Faculty of Agriculture, Universitas Malikussaleh, Aceh Utara, 24355, Aceh, Indonesia
2Program Study of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Medan, 20217, Indonesia
*Corresponding Author: Khusrizal, Program Study of Agroecotechnology, Faculty of Agriculture, Universitas Malikussaleh, Aceh Utara, 24355, Aceh, Indonesia, Email: khusrizal@unimal.ac.id
Online published on 15 May, 2021.
The nutrients released from volcanic ash and manures can enhance soil fertility and plant growth. Weathering of minerals in volcanic ash depends on water, temperature and acids. This study aims to examine the influence of heated and acidified volcanic ash and their?combination with manures on pH and nutrient levels of marginal soil and soybean growth.
The study was designed using a factorial Randomized Block Design, consisted of two factors with three replications. The first factor was heated and acidified volcanic ash (VA) and the second factor was cow manures (CM) which consist of three levels.
The results showed that various of VA treatment, as well as its combination with CM on marginal soils exhibited acidic soil pH, Total-N, exchangeable-K, -Ca were low, while available P and exchangeable-Mg were classified moderate. Various treatments of VA and their combination with CM did not significantly interact on all parameters, except some parameters of soybean. Application of VA and CM on marginal soil interacted significantly on plant height and weight of 100 grains only.
Mineral weathering, Nutrients availability, Organic matter, Soybean growth, Volcanic ash
