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Soybeans should not be re-seeded
Soybean, commonly known as soya bean, is a widely cultivated crop around the world. Many farmers have a traditional practice of planting soybeans year after year without rotating crops. However, this continuous planting leads to several problems. The plants grow slowly, become stunted, their leaves turn yellow, and they become more vulnerable to pests and diseases. As a result, the grain size is smaller, and overall yield significantly decreases.
According to field surveys, in such cases, soybean yields can drop by 20% to 30% or even more. The main reasons for this decline include:
Firstly, the increased risk of diseases and pests. Soybean fields that are planted consecutively create favorable conditions for various diseases such as bacterial blight, black spot, and yellow mosaic virus. Nematodes, in particular, cause serious damage, leading to reduced productivity.
Secondly, the toxic effects of root exudates. Soybean roots release certain acidic substances into the soil, which can form harmful compounds like ferrous salts. These substances interfere with the normal nutrient metabolism of subsequent soybean crops, hinder root development, reduce the activity of beneficial rhizobia, and ultimately slow down plant growth, lowering the final yield.
Thirdly, excessive nutrient depletion. Continuous soybean cultivation depletes the soil of essential nutrients, especially phosphorus. This creates an imbalance between available nitrogen and phosphorus, further affecting plant growth and productivity.
To avoid these issues, it's crucial to break the cycle of consecutive soybean planting. Farmers should implement crop rotation systems, ideally with other crops for at least three years. This not only helps restore soil health but also improves long-term yield and sustainability.
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Soybeans should not be re-seeded