Pengaruh Pertumbuhan dan Hasil Tanaman Kedelai (Glycine max L. Merill) Di Bawah Tegakan Hutan Tanaman

Demand for soybeans is the main source of protein and vegetable oil which continues to increase, so the government's efforts continue to develop several superior soybean varieties and use of under-standing land which is influenced by light intensity. The purpose of this study was to determine the land suitability class and the effect of growth and yield of soybean under 10 year old Samama and Binuang plantations. This research used a factorial randomized block design (RAK) where Factorial A (variety), where (A1 = DENA 1, A2 = Anjasmoro) and Factor B (Stand), (B0 = open land, B1 = Binuang, B2 = Samama). Based on the results of the analysis of soil samples in the three stands, both Binuang, Samama and Open Land, it shows that the land suitability class is quite good (S2) for soybean cultivation, but there are still inhibiting factors in the form of temperature regime (t) and availability. water (w). Meanwhile, the growth of soybean plants showed a faster increase in height in Samama stands, compared to under Binuang stands and open land. The Least Significant Difference Test (LSD) at 5% showed that the Samama stand had a significantly different effect from Binuang stands and open land at the beginning of its growth, namely 7 DAS, 14 DAS, and 21 DAS. The number of leaves showed that there was no significant interaction effect between the variety (A) and the type of stand (B). From the results of the LSD test at 5% level, single factor treatment gave a significant difference on the number of leaves of soybean plants aged 14, 21, 28, 35, and 42 DAS.Keywords: Land suitability, growth and yield of soybean plants, under plantation forest stand

Detection of Peronospora manshurica in imported soybean and analysis of oospore viability in storage warehouses in Ternate City, Indonesia

The soybean needs of the people in Ternate are fulfilled by imported soybeans that enter through Surabaya. The process of transporting imported soybean seeds from Surabaya to the port of Ternate and storage in warehouses may lead to contamination with Peronospora manshurica fungus, which poses a risk of spreading to soybean crops in Ternate. This study aims to detect the presence of P. manshurica fungus, viability, and growth of P. manshurica oospores in the imported soybean storage warehouses in Ternate. The study was conducted using a combination of qualitative and quantitative methods. The qualitative method was carried out through an exploratory approach, while the quantitative method used a randomized block design (RBD) consisting of four treatments, i.e., G.Tbsi, G.Jbla, G.Tfra, and G.Tfrb, with five replications. The observation variables included disease occurance, presence, and characteristics of oospores, as well as oospore growth and viability percentage. The results showed that the average disease occurance in the soybean storage warehouses was highest in the sample of soybeans from the Tfrb warehouse at 1.88%, followed by the Jbla, Tfra, and Tbsi warehouses at 1.44%, 1.41%, and 1.24%, respectively. The study also found P. manshurica fungus in all four soybean storage warehouses in Ternate, with a viability percentage of G.Tbsi, G.Jbla, G.Tfra, and G.Tfrb were 25.8%, 28.8%, 27.4%, 26.5% respectively. These findings indicate the potential for disease spread to soybean crops in Ternate, thus necessitating appropriate preventive measures to address this problem

Pengaruh Aplikasi Mikoriza Arbuskular dan Media Tanam Terhadap Pertumbuhan Kelapa Bido di Kebun Rehabilitasi

The North Maluku region is famous for its agricultural sector, sub-sector of coconut plantations. However, there are various problems that become challenges in efforts to increase coconut production in North Maluku. The purpose of the study was to obtain information on morphological characteristics and growth related to the dose of arbuscular mycorrhizal fungi and the composition of the growing media. The research was conducted at the North Maluku Plantation (BPTP) from August 2019 to February 2020. The study used a factorial of 2 factors, namely the dose of JMA and the composition of the growing media. The first factor is the dose of JMA which consists of 3 levels of M1 (2g); M2 (4g); and M3 (6g). The second factor is a combination of 3 levels of planting media; manure (PK): sawdust (SG): sand (Ps). Data were analyzed using variance (analysis of variance). The results showed that the combination of treatment with a dose of JMA and a certain planting media could stimulate the growth of plant height, stem circumference, number of variables, and the highest crown length at the age of 6 bst.Keywords: bido coconut, arbuscular mycorrhizal fungi, growing media, morphological and growth characteristic