Assessment of nutrient status in Rajagondanahallli Micro-watershed of Channagiri taluk, Davanagere district, Karnataka by using geographic information system technique

Naik. D Balaji, K. Gurumurthy
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Abstract

The study was conducted to assess the soil fertility status and to prepare the fertility mapping at Rajagondanahallli micro-watershed (480.55 ha) of Davangere district by using GIS and GPS techniques during the year of 2019 to 2021. Total 44 surface soil samples at 320 × 320 m grid intervals (0 to 15 cm depths) were collected and soil fertility mapping were developed by using Arc GIS software. The fertility status of soils of Rajagondanahallli micro-watershed indicated that the soil were low (81.15 %) to medium (9.58 %) in available nitrogen, low (4.77 %) to medium (85.95 %) in available phosphorus, medium (52.10 %) to high (38.63 %) in available potassium, available sulphur were found to be sufficient, whereas exchangeable calcium and magnesium were found to be sufficient. DTPA extractable zinc was sufficient in 434 ha (90.24 %) and deficient in 2 ha (0.49 %) area. Whereas DTPA extractable iron, manganese, copper were sufficient. Available boron was low (20.19 %) to medium (70.53 %) in the study area.
基于地理信息系统技术的卡纳塔克邦达瓦纳格尔恰纳吉里taluk Rajagondanahallli小流域营养状况评价
利用GIS和GPS技术,于2019 - 2021年对达万热区拉贾冈达纳哈利小流域(480.55 ha)土壤肥力状况进行了评估,并准备了土壤肥力制图。采用Arc GIS软件,在320 × 320 m栅格间隔(0 ~ 15 cm深度)共采集了44个表层土壤样品,并进行了土壤肥力制图。rajagondanahalli小流域土壤肥力状况表明,土壤速效氮低(81.15%)~中(9.58%),速效磷低(4.77%)~中(85.95%),速效钾中(52.10%)~高(38.63%),速效硫充足,交换性钙和镁充足。在434公顷(90.24%)的面积上,DTPA萃取锌是充足的,在2公顷(0.49%)的面积上是缺乏的。而DTPA可提取的铁、锰、铜则足够。研究区有效硼含量为低硼(20.19%)~中硼(70.53%)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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