In fact soil temperature is often a significant factor, especially in agriculture and land treatment of organic wastes, because growth of biological systems is closely controlled by soil temperature. In addition, soil temperature influences the physical, chemical, and microbiological processes that take place in soil.The influence of soil temperature on plant growth is related to the fact that warmth promotes crop development through increased water and nutrient uptake, while cold inhibits water uptake due to lower water viscosity and slows down the process of photosynthesis. Soils supply the essential nutrients, water, oxygen and root support that our food-producing plants need to grow and flourish. They also serve as a buffer to protect delicate plant roots from drastic fluctuations in temperature. Soils supply the essential nutrients, water, oxygen and root support that our food-producing plants need to grow and flourish. They also serve as a buffer to protect delicate plant roots from drastic fluctuations in temperature. High temperature considerably influences the crops by affecting several physiological injuries like leaf abscission, leaf scorching, senescence, and root and shoot growth limitation that subsequently leads to a reduction in yield. High temperature, even for short period, affects crop growth especially in temperate crops like wheat. High air temperature reduces the growth of shoots and in turn reduces root growth. High soil temperature is more crucial as damage to the roots is severe resulting in substantial reduction in shoot growth. On hot days, water controls transpiration that helps cool the plant. Temperature is the primary factor affecting the rate of plant development. Warmer temperatures will cause plants to move quicker through growth stages. Increased temperature can also change a plant's growth habit and appearance. Temperature is a key factor in plant growth and development. Along with the levels of light, carbon dioxide, air humidity, water and nutrients, temperature influences plant growth and ultimately crop yields. However, when there is a heat wave and soil temperatures increase, plant roots are less able to compensate for varying levels of soil moisture within the soil profile. When soil temperature rises above an optimum threshold, plant water and nutrient uptake can be impeded, causing damage to plant components. Temperature has an impact on the rate of photosynthesis. The rate of photosynthesis increases as the temperature rises. During photosynthesis, a temperature of more than 40 °C slows down the process. Heat can affect a crop's ability to mature in more ways than one. Hotter daytime and nighttime temps tend to accelerate plant processes and affect crop growth, development, photosynthesis, respiration, water transpiration, grain fill, and nutrient cycling.

@ Christopher, in general warm temperature promotes crop development through increased water and nutrient uptake, while cold inhibits water uptake due to lower water viscosity and slows down the process of photosynthesis. The soil temperature also alters the rate of organic matter decomposition and the mineralization of different organic materials in the soil (Davidson & Janssens, 2006). It also affects soil water retention, transmission and availability to plants. Soil temperature may affect the growth of root system components, initiation and branching, orientation and direction of growth, and root turnover.

I believe that high temperature, even for short period, affects crop growth especially in temperate crops like wheat. High air temperature reduces the growth of shoots and in turn reduces root growth. High soil temperature is more crucial as damage to the roots is severe resulting in substantial reduction in shoot growth. High temperature considerably influences the crops by affecting several physiological injuries like leaf abscission, leaf scorching, senescence, and root and shoot growth limitation that subsequently leads to a reduction in yield. The influence of soil temperature on plant growth is related to the fact that warmth promotes crop development through increased water and nutrient uptake, while cold inhibits water uptake due to lower water viscosity and slows down the process of photosynthesis. Soil temperature is often a significant factor, especially in agriculture and land treatment of organic wastes, because growth of biological systems is closely controlled by soil temperature. In addition, soil temperature influences the physical, chemical, and microbiological processes that take place in soil. The temperature of the soil alters the rate of organic matter decomposition and the mineralization of different organic materials in the soil. Soil temperature also affects soil water retention, transmission and availability to plants.