Core Insights - The current autumn harvest progress in China has exceeded 60%, with significant contributions from various regions, particularly the Northeast, which accounts for nearly 40% of the national autumn grain area and production [1][3]. Group 1: Regional Harvest Progress - The Northeast region has seen a notable acceleration in the harvest process since October, contributing significantly to the overall autumn grain production [1]. - The Yangtze River middle and lower reaches account for about 15% of the national autumn grain area, with the middle rice harvest underway and late rice entering the maturation phase [3]. - The Huang-Huai-Hai region contributes approximately 25% to the autumn grain area and production, with local authorities guiding farmers to seize opportunities for harvesting and drying grains [5]. - The Southwest region shows a clear trend of increased autumn grain production, while the Northwest region benefits from sufficient rainfall during the growth period, leading to good crop conditions [6]. Group 2: Specific Crop Harvesting - In Heilongjiang Province, the soybean harvest is in full swing, with a loss rate controlled within 2%, highlighting efforts to minimize grain loss [7]. - In Gansu Province, over 5,000 acres of rice are entering the harvest phase, with local machinery departments ensuring timely availability of harvesting equipment [10]. - In Jiangxi Province, 540,000 acres of late rice are mature, with an expected yield of around 1,200 pounds per acre, and local authorities mobilizing over 1,500 harvesting machines to ensure efficient collection [13]. Group 3: Harvesting Techniques and Innovations - In Henan Province, favorable weather has allowed for accelerated harvesting and drying operations, with significant coordination of machinery and drying facilities [14][18]. - The introduction of AI technology in grain inspection has revolutionized the process, allowing for automated sampling and quality assessment, significantly improving efficiency [19][21].

Core Viewpoint - The article highlights the significant progress made in soil geochemical surveys in southern Xinjiang, which is crucial for agricultural development and resource management, particularly emphasizing the identification of selenium-rich lands and the establishment of a geochemical monitoring network [1][4][14]. Group 1: Project Overview - Since 2016, the Xi'an Geological Survey Center has led a geochemical survey covering nearly 210,000 square kilometers in southern Xinjiang, collecting and analyzing 24,000 soil samples to assess 54 chemical elements [1][4]. - The project has involved multiple organizations, including the Xinjiang Geological Research Institute and the Xinjiang Water and Environmental Geological Survey Center, creating a comprehensive geochemical mapping of the region [5][14]. Group 2: Soil Quality and Agricultural Potential - The evaluation indicates that 99.8% of the surveyed farmland is free from heavy metal pollution, with 33.4% classified as strongly alkaline soil (pH ≥ 8.5) [6]. - High-quality farmland has been identified, with 908,100 acres classified as premium farmland, representing 2.19% of the total cultivated area [6]. - The survey has delineated potential backup agricultural land resources totaling 4,084,500 acres in the Kashgar and Kizilsu regions [6]. Group 3: Selenium Resource Development - A "selenium belt" has been identified, covering nearly 4.9 million acres of selenium-rich land, with 1.13 million acres classified as selenium-rich farmland, accounting for 27% of the cultivated area in southern Xinjiang [9]. - The project has also identified significant areas of calcium, magnesium, and molybdenum-rich soils, with calcium-rich land covering 99.3% of the oasis area [9]. Group 4: Economic and Agricultural Impact - The project has led to the development of a local brand for selenium-rich products, with the Yanchi Basin becoming a demonstration area for selenium industry development [13]. - The analysis of the Bosten Lake sediments revealed a selenium content that ranks it as the richest freshwater lake in China, with local fish exhibiting a selenium enrichment rate of 92.5% [12]. Group 5: Future Directions - The Xi'an Geological Survey Center plans to deepen cooperation with local authorities to enhance the geochemical monitoring network and support the development of characteristic agricultural industries in southern Xinjiang [14]. - Ongoing research will focus on the migration and transformation of mineral elements in soil, crops, and drinking water to support the sustainable development of high-quality agricultural resources [14].