Alabama OTPC Practice Test 2026 – Complete Exam Prep

The main idea is that weeds become a major pest because they compete with crops for essential resources. They grab light with their leaves, use up water, and take up soil nutrients, leaving less for the crops and slowing their growth. This competition can reduce crop yields and quality, especially early in the season when crops are establishing. While some weeds may attract pests, produce toxins, or, in the case of legume weeds, fix nitrogen, these traits are not the general reason weeds are pests across crops. The core issue is the direct competition for light, water, and nutrients that limits crop performance.