Biofertilizer is a biological product that can be used to improve the soil fertility. It is useful in enriching soil with micro-organisms that produces organic nutrients and may also reduce the plant diseases. This experiment investigates the usefulness of biofertilizer which can increase the soil properties. This study was conducted at sugarcane plantation, Purwadadi Subang Bandung. The experiment was arranged in a Randomized Block Design (RBD) with 6 treatments and 4 replications. The treatments were (50; 25) g/treatment Biofertilizer + (¼; ½; ¾; 1) of the recommended dose of NPK and the recommended dose of NPK as a control. The chemical properties (potential K, K sorption, potential P, P sorption, total N and pH) were affected by biofertilizer application, except for N sorption. The best treatment from this product was combination from high level of biofertilizer (50 g) and (1/2 -1) of the recommended dose of NPK. The application of biofertilizer can substitute NPK fertilizer 25%-50% in soil. In general, this product has a good potency especially to increase some of soil chemical properties in a short time with simple application in the field.

One of the problems in the utilization of Andisols for agriculture is their high retention of phosphate by allophane mineral which has variable charge. Such phenomenon can be reduced by giving high phosphate fertilizer or increasing organic matters. This research aimed to understand the effect of dose of P fertilizer and types and dose of organic matter fertilizers to reduce P-Retention and soil pH0 on Andisols planted with sweet corn, so the efficiency of phosphate fertilizer utilization could be achieved. This research was conducted in glasshouse experiments using Completely Randomized Design respectively. The result showed there were no interaction effects between phosphate and organic matters on P retention, P total, P availability, P uptake, pH and pH0. Optimal dose of phosphate fertilizers for sweet corn was 45 kg/ha P2O5 for all organic matter fertilizers.

Textile industry waste decreased environment quality, including agricultural soils. This condition caused the degradationof rice field irrigated with contaminated waste water. Rice fields in Rancaekek contaminated with heavy metals such as Pb. The presence of heavy metals in soil can be transported to plant tissues, especially when heavy metals are present in soluble form. The aim of the research was to study the effect of various UZAAKH fertilizer dosage on pH, total-N, and availability of Pb in paddy field contaminated with textile waste. The experiment was conducted in the greenhouse of Agriculture Faculty, Universitas Padjadjaran from December 2017 to March 2018. The experiment was arranged in Randomized Block Design (RBD), consisted of six treatments with five replicates: 150 ; 200 ; 250 ; 300 ; 350 kg ha-1 UZAAKH and 250 kg ha-1 Urea. Data were analyzed with analysis of variance (ANOVA) followed by Tukey's test at 95% confidence level. The result showed significant effect towards pH and availability of Pb in soil, but negligible differences in Ntotal.