Water quality for agriculture
封冻水的作用就是为了在土壤表面形成一层冻土，保护根系，以免遭受呼啸凛冽的北风侵袭而受冻。
对植物进行灌溉是必不可少的，水分在土壤中如何运移，对科学灌溉非常重要。下面我们以滴灌形式下水分如何运移进行探讨。
This manual is written for Irrigation Specifiers and Landscape Architects. Included here are the detailed design steps to specify a grid of Rain Bird XF-SDI Dripline with Copper Shield™ Technology, complete with information on:
虽然硼是一种必需的植物营养元素，但过量会产生毒性。由于井水中的过量硼不存在补救措施，因此应在景观中种植耐硼植物。“不幸的是，你无法对井水采取任何措施来降低其硼含量，因此选择耐硼植物是明智的选择。”
Although boron is an essential plant nutrient, excessive amounts can become toxic. Since no remedies exist for excess boron in well water, stick to boron-tolerant plants in the landscape.“Unfortunately, there is nothing you can do to your well water to reduce its level of boron, so selecting boron-tolerant plants is a wise direction to take.”
灌溉水硬度往往由水中溶解的碳酸盐引起，这种叫暂时硬度；另外还有一部分钙镁离子与氯离子、硝酸根离子等形成的盐叫永久硬度，硬度升高也会导致PH升高；一般加酸可以分解水质引起硬度的碳酸氢根，同时降低PH，是常用的硬水处理手段；地下水中的铁往往以二价的形式存在，当抽出地表与空气接触，二价铁会氧化成三价或者其他形态形成沉淀，造成水肥设施堵塞。
Understanding and Managing Irrigation Water Alkalinity
Part 2 - Water quality
Irrigation Water and Alkalinity
