Efforts to increase soybean production has been pursued for years in Indonesia through the process of intensification and extensification. Increased production through intensification of increasing grain yield per hectare, among others includes the improvement of cultivation system such as the use of cultivars that have superior resistance to drought. Increased soybean production has been through the expansion of planting areas utilizing available idle dry land. However, one of the constraints faced in dryland agriculture was the limited water supply due to low intensity of rainfall that leads to low crop production. In order to ensure that soybeans are cultivated on dry land remains capable of high production, it is necessary to physiologically engineered the soybean with an open stomata. The study was conducted in the greenhouse of Balai Penelitian Tanaman Serealia (BALITSEREAL) Maros, Sulawesi, Indonesia with a completely randomized block design h factorial pattern. The first factor was the water stress stadia while the second was the amount of sorbitol osmolit concentration application. Results indicated that there was an interaction between the plant height growth and number of leaves between the water clamping time and concentration of the osmolit sorbitol. The vegetative stage especially during flowering and pod formation was inhibited when the water was clamped, but by spraying osmolit sorbitol, soybean growth interms of its height and number of leaves was enhanced. This study implies that the application of osmolit sorbitol may enhance the drought resistance of soybean growth. Future research suggested that more work should be done on the application of osmolit sorbital to other agriculture crops to increase their drought resistance in the drylands.

In this study, factorial randomized experiments were conducted in a controlled greenhouse environment to investigate an efficient and effective component of water management technology in increasing soybean yield. The soybeans were planted in polybags with 6 kg of Alfisol soil media and fertilizer. The bags were perforated with 16 holes at approximately 1 to 2 cm from the base and put into a water container. The container was immersed in water levels of 5 cm and 10 cm. The application of these immersions was carried out in four stages: 0 to 15 days after planting (DAP), 15 to 30 DAP, 30 to 45 DAP, and continued until harvest. Observations of growth were carried out on the greenness of leaves, plant height, leaf area, root length, and dry weight of plants, and soil water content was checked every two weeks. The yield measured after harvest consisted of the number of pods, the number of seeds/plants, weight of 100 seeds, and weight of seeds per plants. The water level had a significant effect on plant height, dry weight, leaf greenness, number of pods, and number of seeds/plants. The immersion stage has significant effects on plant height, harvest age, dry weight, leaf greenness, number of pods, and number of seeds/plants. Continuous immersion in a water level of 5 cm has shown the best yield on number of pods (20.81) and number of seeds per plant (162.94). This treatment increased seed yield (seed weight) approximately by 19.23% compared to the field capacity.

This study aimed to get the best irrigation method and determine the best time-effective provision of water to maintain optimum soil moisture for increase soybean crop production. This research was conducted in the field in Maros District, South Sulawesi. The experiment used a split-plot design and was repeated three times. The main plot was an irrigation method, namely the Scatter irrigation, Furrow, and Flood irrigations method, and its plot was the time of irrigation, namely every 15 days of age, at the period of 15 days, and full flowering and irrigation every 10 days. The results showed that the watering technique using the waterlogging method at the time at the age of 15 days and full flowering had the potential to increase the yield production of soybean, that was the number of pods 164.95 pieces, the weight of seeds 37.11 g, and production 4.64 t/ha. The inundation method was more effective in maintaining soil moisture and twice the application time. But in an optimal amount (229 l/time) was very effective in maintaining soil moisture.

This study aimed to determine the effect of Trichoderma asperellum on the growth of cocoa seedlings under cocoa stands around 20 years old, so that cocoa seedlings to be used as rootstock on approach grafting for the rehabilitation of the roots of cocoa plants are old, growing well. Research compiled by randomized block design with frequency variation application T. asperellum that, once, twice and three times application respectively of4 gr.L -1 each plant. The results of the research, granting T. asperellum on cocoa seedlings planted under old cocoa trees and is still productive, able to help overcome competition in the utilization of nutrients and water as well as other growth inhibiting factors, and the influential on the vegetative growth of cocoa seedlings. Frequency of the best is three times the application that provides the most effective results for growing cocoa seeds, the seed growing percentage of 100% and an average plant height of 144.45 cm; number of leaves 37 strands; stem diameter 12.22 mm; and total leaf area 1388.30 cm2.

The most essentials factor underlying water management are the characteristics of plants to water requirements, the amount of water given, the irrigation methods, and the characteristics of the soil in storing water. The research purpose is to identify and determine the best irrigation method, which can increase the growth and production of soybean plants. Knowing the best method of giving water/irrigation that is able to maintain soil moisture for soybean plants. The experiment used a randomized block design consisting of four treatments, namely: A0 = Control, A1 = Sprinkle Method, A2 = furrow method, and A3 = Flood method. Each treatment was repeated three times. The data were analyzed statistically and if there was a significant effect, it would be continued with an test of honestly significant difference. The results showed that the Flood method gave the best effect on almost all parameters of growth and production observations and the highest yield for production per hectare was 4.32 tons.