Chlorophyll content and stomatal density of soybean varieties on technological packages application under dry land conditions

The development of dry land as agricultural land for increasing soybean production is faced with a number of problems. Therefore, a technological package is needed for soybean cultivation under dry land condition and also need the varieties that are tolerant under dry land conditions. The study aimed to identify the chlorophyll content and stomatal density of soybean by applying several packages of soybean cultivation technology under dryland conditions. This research was conducted under dry land conditions at Tanjung Jati, Langkat (Indonesia). This research was conducted using a factorial randomized block design with 2 factors and 3 replications. The first factor was soybean varieties (Demas, Anjasmoro, Dering, Devon) and the second factor is technology packages (P₁, P_2, and P₃). The result showed that each variety had different chlorophyll-a, chlorophyll-b, and total chlorophyll content. Dering variety has the highest total chlorophyll content, while Anjasmoro variety has the lowest total chlorophyll. Each variety had a significantly different stomatal density. Devon variety has the highest stomatal density, while Demas variety has the lowest stomatal density. The technology package with the addition of dolomite lime 2,000 kg/ha on Dering variety had the highest of chlorophyll content and stomatal density.