Change of Sandy Soil Chemical Properties with Azolla microphylla and Quail Manure
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Uncontrolled land conversion reduces the available land for plant cultivation. The alternative used for rice cultivation is marginal land, such as sandy soil. However, several constraints led to very low productivity, so it needs proper management, such as adding organic matter. This study aimed to determine changes in the chemical properties of sandy soil treated with Azolla microphylla and quail manure. The pot research was carried out in the Greenhouse of the Faculty of Agriculture, Universitas Sebelas Maret, using a factorial Completely Randomized Design (CRD) with two factors. The first factor consisted of four levels of Azolla microphylla (AM),i.e., (0, 50,100, and 150 Mg ha-1). The second factor was three-level quail manure (QM ), i.e., (0, 20, 40 Mg ha-1). Fresh Azolla microphylla and quail manure were incubated for 14 days under anaerobic conditions. The results showed that applying Azolla microphylla, with or without quail manure, significantly improved the chemical properties of sandy soil. The addition of Azolla microphylla (100 Mg ha-1) with quail manure (40 Mg ha-1) increased organic C, Cation exchange capacity (CEC), available-P, Ammonium, Nitrate, exchangeable-K, Ca, electrical conductivity (EC), and redox potential (Eh).
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