Chemical Responses on Fluventic Eutrudept Due to Organic Amendments Application, in Sweetpotato (Ipomoea batatas (L.) Lam.) Farming System

Abstract

Some organic amendments were applied to the soil samples collected from the low layer of Padjadjaran University, located at Jatinangor District, Sumedang Regency, West Java in Indonesia aimed to improve its physical, chemical and biological properties. Some responses occurred on Fluventic Eutrodepts characteristics and the yield of sweet potato. Data were obtained from the experiment of 9 treatments with 3 replications each subjected to Randomized Blocked Design. The treatments were PA (control: no treatment), PB (15 t ha-1 poultry manure), PC (20 t ha-1 poultry manure), PD (15 t ha-1 sheep manure), PE (20 t ha-1 sheep manure), PF (15 t ha-1 cow manure), PG (20 t ha-1 cow manure), PH (15 t ha-1 waste compost), and PI (20 t ha-1 waste compost). Various responses was performed on soil properties and yield of sweet potatoes. PG treatment showed the highest value on organic carbon (T-OC = 4.22%) and total-nitrogen (T-N = 0.86%); PI showed the highest value on pH (pH = 5.1), total-organic phosphorus (T-OP = 25.84 mg kg-1) and yield of sweet potato (18.1 kg plot-1); while PH showed the highest value on exchangeable potassium (E-K = 5.52 mg/100g). In fact, waste compost was recommended to applied in sweet potato farming system.