Complete the compare and contrast sheet on respiration and photosynthesis. Once finished, glue it in your notebook Do Now

Irrigation

Why is irrigation important Irrigation is important because rainfall varies greatly from one season to the next. Irrigation water is obtained from: Rivers and streams Lakes Wells and artesian bores Dams Town water supply Each of these sources has its disadvantages Why is irrigation important

On order to not waste water, farmers need to keep a water budget so they know when to apply. This means they generally have water sensors in the ground that let them know the exact amount of water present in the ground. They also record the amount of rain that falls and the amount of evaporation and transpiration that is happening. Water budgets

Advantage Disadvantage Cheap to set up lots of water lost through evaporation water is unevenly spread disease may grow on wet leaves plant and soil can be damaged if too much water is applied Watering systems Above Crop Uses Sprinklers which can either be permanent or be moved around

Advantages Disadvantages Little water is wasted Only the area needing water gets water Leaves do not get wet Nutrients can be added to the water Expensive to set up Needs ongoing maintenance as it is damaged easily by plants and animals Water needs to be filtered to prevent blockages Watering systems Ground Level Uses drips which are controlled through a system of valves, filters, tubes, joiners and emitters.

Water in the early morning or evening, when evaporation is low Apply enough water so the water can penetrate down to the roots Avoid getting water on leaves and flowers Water before planting seeds Rules for irrigation