Final answer:
The true statements about soil salinization are that it most often occurs with flood or furrow irrigation and can lead to a lower quality and quantity of crops. It's false that most plants can tolerate high salt accumulation as it often leads to reduced plant health and crop yield.
Step-by-step explanation:
B. I and II: Soil salinization most often occurs with flood or furrow irrigation, and it can lead to a lower quality and quantity of crops in soil. It's not true that most plants can tolerate the salt accumulated during soil salinization; in fact, high salinity levels can cause significant stress to many plants, ultimately leading to reduced crop yield and in some cases plant death.
Soil salinization is a process that can happen in arid climates and is exacerbated by certain irrigation methods such as flood or furrow irrigation. Over time, these methods can cause salts to accumulate in the soil, which can adversely affect the productivity of farmland. The presence of high salt content in the soil can withdraw water from plant roots, leading to desiccation and poor plant health, which is contrary to the plants' tolerance to salinity.
Understanding soil salinization is important in agricultural practices, especially to prevent land degradation and ensure that crop quality and quantity are maintained at optimal levels. Mitigation strategies include proper irrigation management, using salt-tolerant crop varieties, and using fresh water to leach out salts.