Presentation on theme: "Nutrient management for organic vegetable production in NC Part I."— Presentation transcript:
Nutrient management for organic vegetable production in NC http://compost.tamu.edu/demos/palopinto/compost.jpg Part I
Nitrogen Phosphorus Potassium Average rates of N, P 2 O 5 and K 2 O applied to vegetable crops in the US Why are these rates so high ? http://www.ers.usda.gov/publications/sb969/sb969c.pdf (lbs/acre)
Most growers believe that high rates of nutrients are needed to produce high yields of high quality vegetables
Jalapeno pepper production in Fresno County, California Total cost of production: $4392 Total fertilizer costs: $170 Fertilizer costs = 4% of total costs
N K Ca Mg P S macronutrients micronutrients air & water Soil ~ 16 elements have been identified as essential for the growth of all plants C O H Cl Fe Mn Zn B Cu Mo Na Co Si VNi Needed by some plants
Micronutrients are critical components of enzymes
Your consent to our cookies if you continue to use this website.