Organic vs Convencional chimical composition of Pear

According to Domagała-Świątkiewicz, Maciej Gąstoł the pear juices revealed the lowest sodium content, in this case no influence of farming system was observed (table 5). An agrotechnical factor, mainly fertilization, strongly affects mineral content of crops. In conventional farming easy-dissolvable fertilizers are used. Soil solution ions are easily absorbed by root hairs. Very soluble sodium is present in many mineral fertilizers and it is rapidly taken up by plants. These are many component that were analyzed: N-NO3: 5.6 ± 1.8a (organic), 2.4 ± 0.9a (conventional). N-NH4 9.3 ± 2.9a (organic), 12.6 ± 4.89a (conventional). Ca 34.0 ± 5.9a (organic), 32.4 ± 8.5a (conventional).

I have calculated the p to see if there is a difference since the author hasn't done so the N=33 the author hasn't told me if the numbers are SEM or SD and i have calculated it in both ways here are some elements that i have calculated and i have calculated it in :

N-NO3= p 0.0001 SD, By conventional criteria, this difference is considered to be extremely statistically significant.

N-NO3= p 0.1167 SEM, By conventional criteria, this difference is considered to be not statistically significant.

N-NH4= p 0.0014 SD, By conventional criteria, this difference is considered to be very statistically significant.

N-NH4= p 0.5637 SEM, By conventional criteria, this difference is considered to be not statistically significant.

Ca= p 0.3777 SD, By conventional criteria, this difference is considered to be not statistically significant.

Ca= p 0.8776 SEM, By conventional criteria, this difference is considered to be not statistically significant.

K= p 0.0001 SD, By conventional criteria, this difference is considered to be extremely statistically significant.

K= p 0.4834 SEM, By conventional criteria, this difference is considered to be not statistically significant.