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According to the need of land to fulfill the program of Intensifikasi Kapas Rakyat (IKR), such alternative land that has been underutilized optimally is needed to be found to anticipate the low capacity of growth. This research tries to improve the soil structure of latosol which has massive structure but has low phosphate availability for cotton cultivation Delta Pine 45 A varieties. A. Biological fertilization in the form of VAM spore inoculant is expected to help phosphate soil is absorbed by the plant. Improved soil structure of latosol by mixing its  top soil  part with river sand in comparison of 2:1. VAM mushroom spores were isolated by wet sieving and inoculated when cotyledon plants formed a broadcast inoculation with a dose of 50 spores per plant. Observations on cotton plant growth include plant dry weight, cotton fruit, phosphate levels of plant tissue during vegetative and reproductive phases, and the callcula ion of the intensity of VAM infections in plant roots. Soil with repaired structure and is VAM-infected, showed significant cotton growth carrying capacity to its control. Plant dry weight increased by 85%, the intensity of infection increased by 28%, tissue phosphate level increased by 83%, and cotton fruit increased by 92%. Restoration of latosol soil structure and use of VAM biological fertilizer could be an alternative extensification of agricultural land for cotton plants.

Low phosphate latosol soil utilization for cotton plants cultivation by modifying soil structure and vam fertilizer application