Effect of N-P-K Fertilization on the Yield and NutrientStatus of Fig (Ficus Carica L. Cv. Kalamon) Trees Grownunder Mediterranean Condition

What I found most interesting is that a 20-5-20 fertilizer is most common in fig tree nutrition.

If I’m reading the study correctly, fertilizer with 1-1.2-0.6 produced the highest yields, but also showed a deficiency in nitrogen. The only treatment in the study that applied more nitrogen than phosphorus and potassium was 0.3-0-0. I wonder if nitrogen was applied at a higher rate, they would see the same or higher yields, but without the noted nitrogen deficiency.
 
bushdoctor82 said:
What I found most interesting is that a 20-5-20 fertilizer is most common in fig tree nutrition.

If I’m reading the study correctly, fertilizer with 1-1.2-0.6 produced the highest yields, but also showed a deficiency in nitrogen. The only treatment in the study that applied more nitrogen than phosphorus and potassium was 0.3-0-0. I wonder if nitrogen was applied at a higher rate, they would see the same or higher yields, but without the noted nitrogen deficiency.
Click to expand...
On many sites many people in the US seem to mention a 20-20-20 or 10-10-10 etc, yet generally it is not freely available in Australia, and reading papers on it, this type of fertilizer is never mentioned, the 1-1.2-0.6 or similar is. This is a paper just on Nitrogen rates that could help.
 

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Rob said:
On many sites many people in the US seem to mention a 20-20-20 or 10-10-10 etc, yet generally it is not freely available in Australia, and reading papers on it, this type of fertilizer is never mentioned, the 1-1.2-0.6 or similar is. This is a paper just on Nitrogen rates that could help.
Click to expand...

Given the results, I am not sure what conclusions can be drawn from the effects of increasing dosages of nitrogen. It seems the main conclusion is that 500g and 100g nitrogen dosages yielded the best results in the study.

- While the highest shoot length (85.19mm) was obtained from 500 g nitrogen dosage, 100 g N (77.52mm), control applications (72.42mm) followed it.

- “While the largest shoot diameter (11.63 mm) was obtained from 500 g nitrogen application, shoot diameter achieved from 100 g N application (11.15 mm) followed it.”

- Highest total yield was obtained from 100g and 500g nitrogen dosage.

- Highest number of nod and average internode length was was obtained from 100g and 500g nitrogen dosage.
 
Rob said:
On many sites many people in the US seem to mention a 20-20-20 or 10-10-10 etc, yet generally it is not freely available in Australia, and reading papers on it, this type of fertilizer is never mentioned, the 1-1.2-0.6 or similar is. This is a paper just on Nitrogen rates that could help.
Click to expand...
This surprised me.

The highest sound yield and total yield came from lowest nitrogen application at the ratio of 1-4.5-5 npk.

Are you aware of any studies that hold nitrogen as a constant and apply varying amounts of phosphorus?
 
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