Effects of Complex Fertilizers on the Properties of Grey Forest Heavy Loamy Soil

Table 4

Determination of correlation coefficient between yield of fodder beet and the amount of nitrate nitrogen in the soil.

Experiment	Deviation from average		Squares of deviations		Sum
1	−10.25	−42.1	105.0625	1,772.41	431.525
2	−10.05	−40	101.0025	1600	402
3	−5.75	8.9	33.0625	79.21	−51.175
4	7.55	13.3	57.0025	176.89	100.415
5	8.25	17.9	68.0625	320.41	147.675
Average	—	—	364.1925	3,948.92	1,030.44