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"This research aims to study the effect of lime addition in acid soil to chemical characteristic of soil and dry weight of green manure crops. The experiment with completely randomized design for factional 7x2 was used. The first factor was green manure crops consisting of seven level and the second factor was lime addition consisting of two levels. Result shows that the liming can increase pH value from very acid to slightly acid, decrease Al-dd content, decrease Al saturation."

"This research was conducted in green house and soil laboratory, faculty of agriculture, Andalas University. The research aim to study the effect of lime addition in acid soil to chemical characteristic of soil and dry weigth of green manure crops. The experimental with completely Randomized Design for factorial 7x2 were used . The first factor was green manure crops, consists of seven levels (Caliandra tetragona, Flemingia congesta, gliricidia sepium, Leucaena leucocephala, Leucaena glauca, Sesbania rostrata, sesbania sesban) and second factor was lime addition, consists of two levels (Without of lime and 1x Al-dd). The result of research indicates that : (1) The liming can increase pH value from very acid (pH 4,45) to slighly acid (pH 5,60), decrease Al-dd content from 2,61 cmol/kg to 1,12 cmol/kg (57,09%), decrease Al saturation from 74,78 % to 49,12% (34,31 %); (2) The highest dry weight at cutting I was Sesbania sesban with liming 1 x Al - dd (26,39 g/pot); cutting II was Gliricidia sepium with liming (24,40 g/pot); cutting III was Giricidia sepium with liming (17,90 g/pot), and cutting IV was Flemingia congesta with liming (29,66 g/pot)."

"Pembangunan Yogyakarta International Airport mendorong pergeseran aktivitas maupun pertambahan aktivitas terhadap tanah-tanah yang berada di sekitarnya. Kawasan sekitar bandara akan ikut berkembang dan dimanfaatkan sebagai investasi terutama pada lahan yang mempunyai prospek dan menghasilkan keuntungan bagi berbagai pihak. Fenomena terjadinya perubahan harga tanah disekitar bandara tak dapat dihindari akibat tingginya permintaan terhadap tanah. Penelitian ini bertujuan untuk mengetahui perubahan harga tanah yang terjadi di Kabupaten Kulon Progo dengan adanya Yogyakarta International Airport serta faktor lainnya yang mempengaruhi perubahan harga tanahnya. Metode yang digunakan penelitian adalah deskriptif komparatif dengan membandingkan sebelum dan setelah dibangunnya bandara. Diketahui pada klasifikasi jarak kelas jarak dekat, perubahan harga tanah didominasi oleh kelas perubahan harga tanah yang tinggi. Harga tanah disekitar bandara sangat tinggi kemudian menurun seiring menjauhnya jarak terhadap bandara namun akan meningkat kembali pada saat mendekati pusat-pusat kegiatan. Selain jarak terhadap pusat-pusat kegiatan, harga tanah dipengaruhi oleh jenis penggunaan tanah dan aksesibilitas dari tanah itu sendiri.

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The development of Yogyakarta International Airport making a shift in activities and increased activity to the it surrounding. The area around the airport will be developed and will be use as an investment, especially in land that has prospects and generates profits for various parties. The phenomenon of land price changes around the airport is inevitable due to high demand for land. This study aims to find out the changes in land prices that occur in Kulon Progo Regency with the presence of Yogyakarta International Airport and other factors that influence the change in land prices. The method used by the research is comparative descriptive by comparing before and after the construction of the airport. In the classification of near distances classification, land price changes are dominated by high classification. Land prices around the airport are very high then decrease as the distance away from the airport but will increase again when approaching another centers area. In addition to the distance to the centers of activity, the price of land is affected by the type of land use and accessibility.

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"ABSTRACTHeavy and toxic metals such as lead, arsenic, cadmium, chromium, copper, and zincreach the soil environment by two processes, geogenic and anthropogenic process. Among the heavy metals inside soil, lead is the most systemic toxicant that affects several organs in the human body Tchounwou et al., 2012 . Lead can contaminate the air, water, and soils, however, the most critical sector in our environment is soil because soil plays a vital role in the food chain. This is the reason why many types of research and innovation are being studied to develop techniques to remedy the soils, especially in an efficient way. The treatment of lead contaminated soils is generally classified into two main principles mobilization and immobilization of lead in lead contaminated soils. The basic principle of mobilization involves the mobilization technique which is to release the metal loid s into the soil solution. However, this method has a big disadvantage. This is because of the big tendency of heavy metals to leach. Besides that, other disadvantages of this method are a complex process, cost very high and not ecologically safe. Immobilization as a treatment method for lead contaminated soil seems to be a better option compared to mobilization due to several advantages. One of the major benefits of immobilization methods is thatlead Pb as the contaminants are unreachable by other creatures.

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ABSTRAKLogam berat dan beracun seperti timbal, arsenik, kadmium, kromium, tembaga, dan seng mencapai lingkungan tanah dengan dua proses, proses geogenik dan antropogenik. Di antara logam berat di dalam tanah, timbal adalah racun paling sistemik yang mempengaruhi beberapa organ dalam tubuh manusia Tchounwou et al., 2012 . Timbal dapat mencemari udara, air, dan tanah, namun, sektor yang paling penting di lingkungan kita adalah tanah karena tanah memainkan peran penting dalam rantai makanan. Ini adalah alasan mengapa banyak jenis penelitian dan inovasi sedang dipelajari untuk mengembangkan teknik untuk meremediasi tanah, terutama dengan cara yang efisien. Perlakuan tanah yang terkontaminasi timbal secara umum diklasifikasikan menjadi dua prinsip utama; mobilisasi dan imobilisasi timbal pada tanah yang terkontaminasi timbal. Prinsip dasar mobilisasi melibatkan teknik mobilisasi yaitu melepaskan logam loid ke dalam larutan tanah. Namun, metode ini memiliki kerugian besar. Ini karena kecenderungan besar logam berat untuk meluruh. Selain itu, kerugian lain dari metode ini adalah proses yang rumit, biaya sangat tinggi dan tidak aman secara ekologis. Imobilisasi sebagai metode pengobatan untuk tanah yang terkontaminasi timah tampaknya menjadi pilihan yang lebih baik dibandingkan dengan mobilisasi karena beberapa keuntungan. Salah satu manfaat utama metode imobilisasi adalah timbal Pb karena kontaminan tidak dapat dijangkau oleh makhluk hidup lain."