Sulphur and Nitrogen Fertilization as a Potential Means of Agronomic Biofortification to Improve the Content and Uptake of Microelements in Spring Wheat Grain DM

Table 4

Selyaninov’s hydrothermal coefficient, sum of precipitation (mm), and mean air temperature (°C) in growing seasons (2009–2011), and the long-term averages from 1971 to 2005 (meteorological station in Zamość).

Years	Months (k)						Sum – mean (III-VIII)
	III	IV	V	VI	VII	VIII	k	p	t
2009	5.3	0.5	2.4	2.1	0.4	0.8	1.3	349.1	2652
2010	1.8	1.1	2.0	1.1	2.1	1.3	1.6	443.4	2715
2011	1.2	1.1	0.7	1.0	2.7	2.3	1.6	414.6	2581
1981–2005	5.1	1.8	1.5	1.6	1.7	1.0	1.6	367.7	2353

k, Selyaninov’s hydrothermal coefficient (k = (p × 10)∑t); p, precipitation (mm); t, temperature (°C).