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So-Hye Choi(최소혜),Yeo-Uk Yun(윤여욱),Jang-Yong Choi(최장용),Dong-Chan Kim(김동찬),Jin-Il Lee(이진일) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
The study was conducted to compare the fertilizer use of actual farmers and the recommended amount of soil and the nutrient input of growing farms in the cherry tomato facility cultivation area in the Chungnam area. After selecting as a sample 47 farms growing cherry tomatoes, a specialized crop in the Chungnam were collected and soil chemical properties were analyzed. As a result, the recommended amount of fertilizer use was calculated, and through a survey, the amount of organic fertilizer use(such as livestock manure and oil meal) and chemical fertilizer use and fertilizer traits·usage method·component content were investigated. As a result of soil Chemical properties investigation, 52.1% of pH was higher than the appropriate level, EC was within the appropriate range of 72.9%, and 79.2% of organic matter was insufficient and Avail.P²O<SUP>5</SUP>, Exch. K, Ca, Mg were 75.0, 54.2, 68.8, 85.4%, excessive compared to appropriate range. As a result of the survey on the use of fertilizer, the amount of compost used was 1,348kg/10a, which was about three times more than the recommended amount of 487kg/10a. On average, 317kg/10a organic fertilizer were used, and among them, oilseed was the most used. The total fertilizer usage(including compost) of cherry tomato growers was nitrogen 30.3, phosphoric acid 19.4, and potash 24.8 kg/10a and fertilizer use(including inorganic+organic fertilizer but excluding compost) was investigated as nitrogen 26.9, phosphoric acid 17.7, and potash 21.4kg/10a. The recommended amount of fertilizer according to the soil test is nitrogen 18.3, phosphoric acid 8.0, and potassium 16.5kg/10a, which is about twice the recommended use of ferilizer by the soil test compared to the farm use excluding compost.
Survey on the Change of Physical Properties of Upland Soil in Chungnam Province
Jang-Yong Choi(최장용),Dong-Chan Kim(김동찬),Yeo-Uk Yun(윤여욱),So-Hye Choi(최소혜),Jin-Il Lee(이진일),Jeong-Woo Son(손정우) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11
The growth and yield of crops are directly affected by soil physical properties. In most of the arable lands, the soil physical properties are expected to change with climate changes and the use of large agricultural machinery, and it should be surveyed on the arable land characteristics and the scientific management for the sustainable agriculture. In order to survey the physical properties of upland soil in Chungnam region, the soil samples for this study were collected from 45 places as points that represent the distribution rate of upland field, and investigated the agricultural condition as the kind of crops, structural condition and land-use pattern and examined the soil physical properties as soil texture, three phases of soil, and bulk density and the soil chemical properties as pH, EC and OM. Soil texture of the surveyed upland soils were mostly sandy loam and loam. The rate of cultivated crops were ordered as garlic(12plots), perilla(6), pepper(6), and were cultivated maize, sweet potato, potato, and peanut etc. The depth of A horizon was 21.1㎝ and the results of bulk density were top soil 1.33 Mg m<SUP>-3</SUP> and subsoil 1.57. The rates of three phases of the top soil were composed of solid 50.2%, liquid 25.6, and air 24.2, however the subsoil were composed of solid 59.3%, liquid 30.9, and air 9.9. The distribution rates of the particle size in top soil samples were sand 47.2%, silt 37.7, and clay 15.1, however the subsoil samples were distributed with sand 44.9%, silt 36.0, and clay 19.1. It is necessary to improve long-term soil physical properties with methods such as application of organic matter and deep tillage since the physical properties of bulk density and solid phase ratio have deteriorated compared with the data surveyed 4years ago.