Mungbean is one of the main commodity which are planted in the dry season after planting rice. Even though having a high marketable value, the productivity of mungbean is still quite low because the farmers rarely provide enough fertilizer dosage and use the low growed seeds which resulted directly to the low quality or productivity. This study aims to determine the response of three mungbean varieties in paddy fields with five levels of NPKS (15:15:15:10) fertilizers. The study was consisted of three varieties (Vima-1, 2, 4) and five doses of NPKS fertilizer (100, 200, 300, 400, 500 kg ha^-1). The study was applied to the randomized completely block design with three replications. The results showed that plant height, number of clusters, biomass dry weight, and seed yield ha^-1 of mungbean are significant different between Vima-1, Vima-2 and Vima-4 varieties, while the addition of NPKS inorganic fertilizers could increase plant height and root weight. The interactions between varieties and the NPKS fertilizer dosage was experienced in the number of pods and seed weight per plant. The highest yield of mungbean was resulted in Vima-1 (2.18 tons ha^-1) whereas the lowest yield was obtained by Vima-2 which resulted in seed 1.42 tons ha^-1. The application of inorganic fertilizer NPKS (15:15:15:10) 100 kg ha^-1 has quite enough to produce an optimum productivity of mungbean in Malang rice fields.

The diversity of genetic material determines the success of cocoa production. improvement and breeding programs. Enrichment of genetic material for Bangka cocoa can be achieved through exploration and characterization of morphological features or characters of accessions, clones, and/or varieties. To determine the level of diversity of qualitative and quantitative traits. Morphological exploration and characterization was aimed at identifying the diversity of Bangka cocoa as an effort to increase the efficiency of utilization of local genetic material. The research used survey, and direct characterization (purposive sampling). Exploration to obtain a cocoa plant passport consists of accession number, accession name, location of origin, owner's name, age of plant, and land area. Characterization to obtain the identity of qualitative and quantitative characters from leaves, flowers, fruits, and seeds refers to “The Systematic Description of Cacao Clones. The results of the exploration-characterization obtained 29 accessions of cocoa from Bangka, which had very diverse morphological characters. Diversity is evidenced by wide phenotypic variability even though it has narrow genetic variability, and the similarity level of some accessions is quite low, namely <50%.

White pepper production is not in line with the government's extensification and intensification efforts, these are due to disease infection in the pepper plant that tends to increase. Information about disease progression of black pepper plants in production center areas is rarely updated. This research was conducted to observe and determine incidence and severity disease of the black pepper plantations by using the purposive sampling method. The results of the study found three types of disease that infected on black pepper plantations in the South Bangka Regency, namely yellow disease, stem rot disease, and viral disease. The incidence and severity disease are relatively higher in the Tukak Sadai District than others. The incidences of yellow disease, rot stem disease, and viral disease about 3,33 to 90,48 %; 0 to 43,70 %, and 12,5 to 100 %, respectively. The severity of rot stem disease until 43,11 %; and viral disease about 4,58 to 59,57 %.

Biotic and abiotic stress during cultivation is one of the challenges in increasing upland rice production. Stress can be mild to severe, potentially reducing yield. Knowing the ability of plants to adapt to stressful environments from the start is essential information in the assembly of new high-yielding varieties. This study aims to determine stress in 36 upland rice lines and the adaptability of several upland rice lines to environmental stress. The genetic material used was 36 upland rice lines and two comparison varieties with four replications. The line is planted in Lampung, DI. Yogyakarta and East Java, two locations each. That area has different soil types and elevations. Data were analyzed descriptively and tabulated. In addition, the average scoring of biotic and abiotic stress for each location was calculated. The results showed that biotic stresses found in the plantations were Leaf Blast, Neck Blast, Bacterial Leaf Blight, Brown Spot, Red Striped, Rats, Birds, Rice Leaf Roller, and Stem Borer. Meanwhile, the abiotic stresses found were drought and salinity. From 36 tested lines, it showed that G26 was resistant to biotic stress caused by pests and diseases, G29 was drought-tolerant, and G6 was salinity tolerant.