This research investigated the effect of light intensity and biofertilizer on the yield, which includes the production of indigo compounds and plant nutrient uptake. The study used a randomized complete block design with a split plot design with 4 levels of light intensity as the main plots and 4 levels of biofertilizer as a sub plots with 3 replications. The combination of light intensity and biofertilizer affects fresh weight, biomass and tissue nitrogen. The highest fresh weight and biomass was found at 100% light intensity with double inoculation of mycorrhizae and rhizobium. Whereas the highest tissue nitrogen was at 10% light intensity with double inoculation of mycorrhizae and rhizobium. The production of indigo affected by light intensity, ie at 10% light intensity indicates the highest indigo. Mycorrhizae and rhizobium have a synergistic relationship as biofertilizer in increasing plant yields and nutrient uptakes in 100% light intensity.

Climate change is a global problem that has an impact on food production. Protein needs for people in developing countries such as Indonesia have not been fulfilled optimally. Indonesian people’s protein consumption is still at 65.7%, much lower than it should be. The development of soybean cultivation as a source of vegetable protein is very potential. This article aims to examine the role of soybean agroforestry to meet human protein needs and as an effort to mitigate climate change.In Indonesia, soybean development is constrained by people’s views; soybean is not the main crop and the rate of land conversion. An effort to overcome the limitation of optimum land according to the growing season is the development of soybean cultivation under forest stands as an agroforestry system. In Indonesia, there are production forests, including teak, pine, sengon, and resin, especially in teak, pine, and sengon forests, soybean cultivation with agroforestry systems has developed. The main obstacle to cultivation in the agroforestry system is low light due to the shade of the tree canopy. It requires efforts: tree spacing, especially between rows, trimming the tree canopy when the canopy is getting tighter, and low light tolerant plant varieties. Soybeans are low-light tolerant plants. The national average soybean production of about 1.5 tons ha-1 can be achieved in teak-based agroforestry systems up to 3-4 years old tree, pine-based up to 3 years old, and sengon-based up to 5 years old. The agroforestry system has the potential as land for the cultivation of organic plants in mitigating the impacts of climate change.

The productivity of red ginger in Indonesia has decreased by 9,174 tons compared to 2017. The decrease is due to the very limited area of red ginger production, the method of red ginger cultivation, which is still very conventional, and the low amount of organic matter in the soil. This study examines the effect of planting media composition on the growth and production of red ginger. The study used a Completely Randomized Block Design (RCBD) with six treatments, namely control (soil without manure), cow manure: green manure: soil (1:1:1), P2 = goat manure: green manure: soil (1:1:1), green manure: soil (1:2), cow manure: soil (1:2), and goat manure: soil (1:2) and repeated four times. Composition media of goat manure: green fertilizer: soil with a ratio of 1:1:1 could increase the growth of red ginger in variable plant height, number of leaves in the clump, leaf area, and the weight of fresh stover with a yield of 52.7 cm; 10,75; 148,5; 2952.59 cm2; and 307.33 g. Composition of green fertilizer media: soil with a ratio of 1:2 could increase the weight of dry stover with a value of 39.32 g, and red ginger production includes fresh weight of rhizomes 111.32 g, storage weight of rhizomes 107.87 g, and rhizome volume 124.12 cm3.

Indonesia's corn harvest area is decreasing so that corn production is also decreasing. The use of suboptimal land can be done to increase the harvested corn area by adding nutrients with organic fertilizers. One of the organic fertilizer ingredients is corn cob waste. The aim of the study was to examine the role of corn cob fertilizer on the growth, yield and nutrient uptake of corn. The study used a completely randomized block design with one fertilization factor with six levels, namely chemical fertilizers and corn cob organic fertilizer at a dose of 2.5, 5, 7.5, 10 or 12.5 tons/ha. Corn cob organic fertilizer has met the standard as an organic fertilizer with an organic C content of 62.21% and organic matter of 85.71%, ranking it in the high category. The total nitrogen is 1.44%, total phosphate is 1.43% and total potassium is 2.17%. Corn cob organic fertilizer had an effect on the leaf area index, root length, levels of chlorophyll a and chlorophyll b, weight of 100 seeds, cob diameter and phosphate uptake. Doses of 12.5 tons/ha produced the highest changes in chlorophyll a and b, root length and phosphate uptake. Phosphate and potassium uptake correlated with plant biomass and root length. Therefore, the results of the present study suggest that corn cob organic fertilizer is able to support the growth, yield and nutrient uptake of corn in sub-optimum land. Several gaps and research priorities in soil fertility have been identified, which need to be addressed in the future.

<p>Kegiatan pengabdian masyarakat bekerjasama dengan CV. Indigo Biru Baru yang merupakan usaha batik pewarna alami di Desa Puron, Kecamatan Bulu, Kabupaten Sukoharjo dengan memanfaatkan tanaman <em>Indigofera tinctoria</em> sebagai pewarna biru alami. Pengelolaan tanaman tersebut sebagai pewarna alami menghasilkan limbah yang belum dimanfaatkan. Permasalahan limbah tersebut mendorong pemanfaatan limbah sebagai pupuk organik padat. Tujuan kegiatan pengabdian yaitu membina mitra dalam pengelolaan limbah ekstraksi sebagai pupuk organik. Metode yang diterapkan yaitu: uji coba pembuatan pupuk organik limbah ekstraksi <em>Indigofera tinctoria</em>, analisis kualitas pupuk organik, penyuluhan dan demonstrasi tentang pemanfaatan limbah sebagai pupuk organik, demontrasi plot budidaya <em>Indigofera tinctoria </em>dengan aplikasi pupuk organik, demontrasi plot budidaya sayuran<em> </em>dengan aplikasi pupuk organik. Hasil kegiatan pengabdian masyarakat menunjukkan bahwa limbah ekstraksi <em>Indigofera tinctoria</em> dapat digunakan sebagai pupuk organik dan memenuhi persyaratan standar sebagai pupuk organik menurut Permentan No.70/ Permentan/SR.140/10/2011. Kualitas pupuk organik meliputi parameter kadar air, N total, P₂O₅, K₂O, C-organik, C/N rasio dan pH menjadi indikator keberhasilan pengelolaan limbah sebagai pupuk organik. Berdasarkan kegiatan penyuluhan menunjukkan bahwa peserta interaktif dan berminat untuk memanfaatan limbah ekstraksi <em>Indigofera tinctoria </em>sebagai pupuk organik. Pupuk organik limbah ekstraksi dapat digunakan sebagai media tanam untuk penanaman sayuran dan pembibitan <em>Indigofera tinctoria</em>. Hasil percobaan menunjukkan bahwa pemberian pupuk organik limbah ekstraksi dapat meningkatkan pertumbuhan tanaman <em>Indigofera tinctoria </em>pada 6 MST<em>. </em>Hasil kegiatan yang diperoleh yaitu peningkatan pengetahuan mengenai teknologi tepat guna untuk memanfaatkan limbah.</p>