The purpose of this research was to find out the response of celery plants when inorganic fertilizers are reduced and substituted with oil palm decanter cake mill waste. This research was conducted at Farmer’s Field in Tangkit Baru Village, Sungai Gelam Sub-district, Muaro Jambi Regency, uses Randomized Block Design with one factor ie decanter cake and inorganic fertilizer (NPK) consists of 7 levels, namely: 100% NPK Fertilizer (as recommended 200 kg urea / ha, 150 kg / ha SP-36, 200 kg / ha KCl ), decanter cake 15 ton / ha, 20 ton / ha, decanter cake 15 ton / ha + 75% dose of NPK (25% reduction of NPK dosage), decanter cake 15 ton / ha + 50% dose of NPK (50% reduction of NPK dose ), decanter cake 20 ton / ha + 75% dose of NPK (25% reduction NPK dose), decanter cake 20 ton / ha + 50% dose of NPK (50% reduction of NPK dose). The parameters observed were plant height, number of leaves, number of stems per hill, fresh weight per plant and plant growth rate. The results showed, that plant response to the reduction of 50% inorganic fertilizer substituted with decanter cake 15 tons per hectare gave the best celery fresh weight , leaves number and the highest celery stems number. For plant height parameters and the highest plant growth rate indicated that there was no significant difference between 15 tons per hectare and 20 tons per hectare of decanter cake at 50 percent reduction of inorganic fertilizers.

The purpose of this experiment is to evaluate the best combination of inorganic fertilizers and organic material from palm oil mill waste decanter cake, which give the best Chinese kale growth and yield at ex-coal mined soils. This is a pot research, conducted at Agricultural Farm, Agriculture Faculty, Jambi University, using RCBD  with one factors and 11 treatments of combinations of NPK + Decanter Cake fertilizer from palm oil mill solid waste. The parameters observed were increase in plant height and number of leaves, leaf area and plant fresh weight. The results showed, the best treatments for increasing plant height and number of leaves was achieved at 50% of NPK from recommended doses with DC 20 ton/ha or 75% of NPK with DC 20 tons per hectare. For leaf area and plant fresh weight (yield), was achieved at 50 percent of NPK from recommended doses + DC 15 tons per hectare. The conclusion of this research is to increase chienese kale growth and yield in ex-coal mining soil can be done by fertilizing NPK 50 percent from recommended doses + decanter cake 15 tons per hectare.

This research was conducted to determine the response of soybean plants when inorganic fertilizers were reduced and replaced with palm oil mill waste decanter cake. This research was conducted at Farmers’ Land in Harapan Makmur Village, Rantau Rasau District, Tanjung Jabung Timur Regency. This study uses a one factor randomized block design, namely decanter cake and inorganic fertilizer (NPK) consisting of 7 levels, namely: 100% NPK fertilizer, Trichoporiza Plus (TP) 5, 10 and 15 ton/ha, TP 15 ton / ha + 50% NPK dose, TP 10 tons/ha + 50% NPK dose, and TP 5 tons / ha + 50% NPK dose. The parameters observed were plant height, number of leaves, number of branches and number of pods. The results showed that the response of plants to the reduction of 50 percent inorganic fertilizers substituted with TP 15 tons per hectare give the highest of plant height, number of leaves and number of branches but TP 10 ton/ha give the highest number of pod. All parameters shows that there is no significant difference between 10 tons per hectare and 15 tons per hectare of TP in the reduction of 50 percent NPK fertilizer.

Opencast mining caused heavy deforestation and barren land in Jambi. This ex-mining land must be reclaimed by planting crops based on biofertilizers containing mycorrhizae, this is a potential alternative that provides benefit both agronomy plant and ecosystem specially replanting with oil palm. Those are the technology for reclamation ex-coal mining soil. This research aim is to examine the effect of four combinations indigenous isolate of Arbuscular Mycorrhizae Fungi (AMF), which is originated from ex-coal mining soil that combined with Phosphorous fertilizers to minimize utilizing P fertilizer at oil palm pre-nursery, to improve soil fertility, and seedling growth. Hence, this research was arranged in factorial experiment with 2 factors, using a complete randomized design with three replications. The first factor is five different mycorrhizae isolates, representing a broad range of endomycorrhizae fungi, there are: without indigenous AMF, isolate of Glomus sp. 3, isolates of Glomus sp. 6, isolates of Glomus sp. 15 and isolates of Glomus sp. 16. The second factor is P fertilizer: control (without P fertilizers), fertilizer dosage P 25%, 50%, 75%, and 100%. Variables measured are shoot height, number of leaves per plant, total leaf area per plant, and plant stem diameter. The data were analyzed by analysis of variance to see whether there was an interaction between the MVA isolate and the P fertilizer dosage. The result showed a significant effect on palm oil seedling growth, shoot height, number of leaves per plant, total leaf area per plant but there is no interaction on the stem diameter. Plants that are inoculated with mycorrhizae have greater P content in leaves than those not inoculated. The types of isolated Glomus sp.3 and dosage P 75% of recommended dosage, give the best seedling growth. This research concluded that inoculation with AMF could minimize P fertilizers doses.

Now rice can be planted in the yard, using polybags and SRI Method (one seed per pot). Liquid organic fertilizer based on local microorganism (LOM) which is obtained by fermentation livestock urine and extract of golden snail. This extract is used as biodecomposer to ferment livestock waste into solid and liquid fertilizer. The fertilizer is used for black rice plant in polybag. This technology was applied in Sri Agung village from Sido Rukun and Sido Mukti area, specially for womens from several RT and for agriculture womens association that are active in the utilization of yard. The target is to increase the yield of the yard, previously no rice crops, now exist, at least each pot produced 500 g of dry black rice, 100 liters of liquid organic fertilizer per month and 50 kg of solid fertilizer per two months. The result showed, the level of PKK participation when mentoring is high because from 50 people, 40 people are present in every activity. Evaluation showed there are high farmer participation in land preparation and demonstration of RINMAS technology and low level farmers participation in implementation SRI method. It is recommended to planting rice on the yard.