印尼报导,在灰化红黄壤进行的田间试验结果表明,胶园种植单独或混合的豆种复盖,或复盖加天然杂草,胶树在第一年比仅仅复盖天然杂草禾本科与米甘草的获得较高产量,单纯复盖泽生四棱豆和混合复盖泽生四棱豆、爪哇葛藤、蝴蝶豆、毛蔓豆及天然禾本科杂草,获得显著增产。 Indonesia reported that the results of a field trial of ashing in ashed yellow soil indicate that the planting of single or mixed bean seeds in a rubber plantation or the application of natural weeds is more effective in the first year than in the natural weeds Poaceae With the higher yield of rice licorice, the yield was significantly increased by simply covering Zexu almonds and the mixture of Geoxianbaoxi, Juglans regia, Butterflies, Mordra and natural grass weeds.