Basal stem rot caused by Ganoderma boninense is a major disease of oil palm in Indonesia. Environmental factors associated with disease can be used as the basis for developing disease control. This study aims to describe the physical and chemical properties of oil palm plantations land mineral soil land that is infested with basal stem rot. Soil composite samples were randomly collected from diseased and healthy palm circle from an oil palm plantation in Mesuji, South Sumatra. The results showed that the texture and nutrient status of diseased and healthy plants were not significantly different, namely they had the same low analytical values ​​in terms of the content of N, C-organic, CEC, Mg, Ca, Na, and K2O. The ratios of C/N, exchangeable K and exchangeable acidity in healthy and diseased soils were both moderate to high. The content of available P and total P was very high (43−134 ppm) and was found to be higher in the soil of diseased plants than in healthy plants. These results indicated that high availability of P nutrients may favor G. boninense infection in oil palm plantation.

Hamidson H, Effendy E, Dewi WN, Ayundra SD. 2020. Test of multiple rice varieties (Oryza sativa L.) to the development of leaf blight disease caused by curvularia oryzae. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 9(2): 109-116.  Rice is the main food commodity in Indonesia, since the  majority of  Indonesian populations use rice as their staple food. One of the common diseases that attack rice plants is leaf blight caused by pathogenic Curvularia oryzae. The objective of this research was to determine the reaction of five varieties of rice resistance to diseases caused by Curvularia oryzae. This research was conducted at Experimental Research Station and Phytopathology Laboratory of the Departement of Plant Pest and Disease, Faculty of Agriculture, Sriwijaya University from August to December 2016. Randomized block design was applied in this experiment by using 5 treatments and 10 replications. The Results showed that the highest percentage of leaf blight disease occured in P3 (Inpari 30) by 22,36% and the lowest percentage was found in P5 (varieties IR 10) by 2,85%.