2026年4月托福机经套卷(第3套) - Read an Academic Passage / 2 Q5

Biofertilizer Dynamics in Agrochemistry One of the latest inventions in agrochemistry is biofertilizers. This innovation aims to provide an environmentally friendly alternative to traditional fertilizers, which are infamous for causing soil and water pollution. Biofertilizers use living microorganisms to improve soil fertility by fixing nutrients such as nitrogen, ensuring that these nutrients remain available for plant uptake. Unlike conventional fertilizers that simply release nutrients into the soil, biofertilizers enhance the soil's own biological activity, creating a more sustainable agricultural practice. Increased bioactivity results in improved soil structure. Microorganisms in biofertilizers produce substances that bind soil particles together, enhancing aeration and water retention. This mechanism is particularly vital in arid regions, where soil degradation poses a significant challenge. Yet, this ability makes the effectiveness of biofertilizers depend on specific soil types and crops, introducing complexities into their use. Despite their potential, biofertilizers face hurdles, including skepticism from farmers accustomed to chemical fertilizers. Concerns about cost, availability, and the need for new agricultural knowledge contribute to their slow adoption. Moreover, the regulatory landscape for biofertilizers is still developing, affecting their market presence. Still, some regions have started to implement subsidies and educational programs to encourage the transition to these sustainable options, hinting at a shift in agricultural practices.