This study aims to determine the effect of which combination of fertilizer doses is best for the growth of Mustard Plant (Brassica juncea L.).And the research was conducted in Kelurahan Rurukan Tomohon Timur Subdistrict Tomohon City. Soil analysis was conducted in Soil Chemistry and Soil Fertility Department of Soil Agricultural Faculty of Sam Ratulangi University of Manado.This study used a Completely Randomized Design (RAL) consisting of 7 treatment combinations and repeated as many as 4 (four) times to obtain 28 pot experiments. Each pot of the experiment contains 5 kg of soil.The results showed that soil mixture with various combinations of fertilizers had a significant effect on the height of the green mustard plant, the number of leaves of green mustard greens, and the fresh weight of the green mustard plant.The best combination of soil mixture with Urea, Sp36, and Compost fertilizer is 0.5 gram / pot Urea, 0.375 gram / pot Sp36, and 50 gram / pot compost.

This research aimed to determine the effects of compost applications on ex-mining lands by using chinese cabbage as indicator. The experiments were conducted at the Faculty of Agriculture greenhouse and the soil and compost analysis were done at the Soil Chemistry and Fertility Laboratory for a duration of two months. The research employed a Completely Randomized Design method with 5 treatments repeated 3 times to get 15 experimental units. The analysis on ex-mining soil revealed that it contained only trace amounts of soil nutrients N, P, and K. The laboratory analysis on the compost sample resulted in a C/N ratio of 11.87 which suggested that the compost was mature and ready to be used. The Analysis of Variance on research data showed that compost applications did not affect plant height between treatments at each weekly observation, and similarly did not affect leaf quantity and fresh weight at harvest time. However, the research found that the compost applications tended to improve plant height, leaf quantity, and fresh weight of plants at harvest time. The minimal effect of compost applications between treatments suggested that the plants did not utilized the nutrients supplied by the compost in their early stages of development. Moreover, it was also suspected that the compost applications had not been sufficient in supplying the soil nutrients needed by the plants to ensure proper growth which ultimately affected the fresh weight of the plants at harvest time.

This study aims to determine the effect of kirinyuh organic fertilizer and phonska fertilizer on changes in the properties of tailings soil and the growth and production of upland rice. Land tailings are taken from the location of the  wilayah pertambangan rakyat (WPR) in Tatelu Village, Dimembe District, North Minahasa Regency. And the research was carried out at the Green House, Faculty of Agriculture, Sam Ratulangi University. This study was designed using a completely randomized design (CRD) with a factorial pattern consisting of two factors, namely: Factor I is kirinyuh organic fertilizer (A) which consists of 4 (four) levels: A0 = 0g / polybag, A1 = 300g / polybag, A2 = 600g / polybag, A3 = 900g / polybag and Factor II which is Phonska Fertilizer (B) consisting of three levels: B0 = 0g / polybag, B1 = 1,5g / polybag, and B2 = 3g / polybag. Each poly bag is filled with soil up to 20 kg.Keywords:  Kirinyuh; Phonska; Land of Tailings.AbstrakPenelitian ini bertujuan untuk melihat pengaruh pemberian pupuk organik kirinyuh dan pupuk phonska terhadap perubahan sifat kimia tanah tailing dan pertumbuhan serta produksi padi ladang. Pengambilan Tanah Tailing diambil dari lokasi Wilayah Pertambangan Rakyat (WPR) di Desa Tatelu, Kecamatan Dimembe, Kabupaten Minahasa Utara. Dan Penelitian dilaksanakan di Rumah Kaca  Fakultas Pertanian Universitas Sam Ratulangi. Penelitian ini dirancang dengan menggunakan Rancangan Acak Lengkap (RAL) dengan pola faktorial yang terdiri dari dua faktor yaitu : Faktor I yakni pupuk organik kirinyuh (A) yang terdiri dari 4 (empat) taraf : A0 = 0g / polybag, A1 = 300g / polybag, A2 = 600g / polybag, A3 = 900g / polybag dan Faktor II yakni Pupuk Phonska (B) yang terdiri dari tiga taraf : B0 = 0g / polybag, B1 = 1,5g / polybag, dan B2 = 3g / polybag. Setiap polybag diisi tanah sampai seberat 20 kg.Kata Kunci:  Kirinyuh; Phonska; Tanah Tailing.