出典:Wikipedia
出典:『Wikipedia』 (2011/02/15 02:25 UTC 版)
CULTAN Fertilization, or Controlled Uptake Long Term Ammonium Nutrition, is a type of injection fertilization where the entire amount of nitrogen needed for a plant to grow is injected at one time. During CULTAN fertilization, nitrogen is applied at the first signs of nitrogen deficiency in plants. Fertilizer is more commonly spread on the surface of fields in either a liquid or powder form by spraying it.