Crop Nutrition Advice for a Successful Celery Crop
To achieve those goals, Yara Crop Nutrition uses the 4-R nutrient approach as the nutrient management framework to help celery growers achieve their crop system goals. The 4-R Nutrient Stewardship incorporates four components; the Right fertilizer source at the Right rate, at the Right time and in the Right place.
The right fertilizer time for celery nutrient management
Small amounts of nitrogen (N) and other nutrients are required in early stages of development. Little N is taken up after planting and between 20 to 30 lb N/ac can supply the crop demand of young plants for about 30-45 days after transplanting. The needs of N increases as the crop matures and N uptake reaches a maximum two weeks prior to harvest during the time of rapid biomass accumulation. It is recommended to apply fertilizers at each irrigation event to have a continuous supply of soluble nutrients at low rates, and avoid accumulation of fertilizers within one application.
The right fertilizer place for celery nutrient management
The major rooting zone of celery crops is in the top foot of soil and for that reason nutrient uptake efficiency for celery is low. Placement of fertilizers within the root zone will help to effectively deliver nutrients to where they are taken up by plants. Fertigation is the most efficient way for supplying in-season fertilizers in celery, especially N. Fertigation ensures better application of readily available N in a frequent form to meet crop demand and minimize nitrogen losses to the environment.
The right fertilizer rate for celery nutrient management
Fertilization amounts should be based on soil nutrient levels, yield expectations and duration of the crop cycle. The total N required for a high-yielding celery crop ranges from 200 to 250 lb/ac. Potassium (K) is needed in large quantities - up to 500 lb/ac - and celery tends to respond to K fertilizer even at relatively high soil K levels. Calcium is also needed in relatively large quantities and it is essential for strong cell development that minimizes the incidence of celery black heart.
The right fertilizer source for celery nutrient management
When applying fertilizers, it is important to ensure the correct form is being added specific to the crops and field conditions. Between 30 to 40% of the N in the ammoniacal form (NH4) and 60 to 70% in the nitrate form (NO3) are recommended for celery. YaraLiva® CAN-17™ provides predominantly nitrate-nitrogen, the form of nitrogen preferred by most crops, to supply immediately available nitrogen that supports periods of significant growth and dry matter accumulation of celery.
Also, trials confirm that ammoniacal-nitrogen is more conducive to Fusarium yellows of celery, caused by Fusarium oxysporum, than nitrate-nitrogen. (Schneider, R.W. 1985)
- Grade 17-0-0 8.8 Ca
- Nitrate N 68%
- Calcium (lbs/gal) 1.11
- Weight (lbs/gal) 12.64
- pH 6.0-6.5
15:1 ROI, $742 increased net return/ac
Celery Carton/ac by Size
Celery takes up most of the potassium during the second half of its growth cycle. YaraTera® NITRAKAL™ MAX provides balanced nitrate-nitrogen, potassium and calcium which is ideal for applications by fertigation during peak demand in the weeks prior to harvest.
- Total Nitrogen (N) 10.0%
Nitrate N (NO3) 9.5%
Ammoniacal N (NH4) 0.5%
- Soluble Potash (K2O) 7.0%
- Calcium (Ca) 9.5%
Tissue analysis collected from a local field trial conducted in Camarillo, California demonstrates how the timely use of YaraTera NITRAKAL, at the right rate, can exponentially be a more efficient approach for celery nutrient management. The trial consisted of field size blocks using a baseline program and the combined YaraTera NITRAKAL program. A total of 85 gallons per acre of YaraTera NITRAKAL were fertigated to supply balanced nitrate-nitrogen, potassium and calcium together in the same liquid solution at critical stages. The potassium source used in the baseline program included 500 pound per acre side-dressed application of 6-24-24. The results assist growers when deciding on a more effective practice that supplies the right form of nutrients at the right rate, time and place to attain favorable yields and minimize environmental impact.
|Parameter||Control||YaraTera NITRAKAL Treated|