Spring agricultural chores

Many days there is not the sun, and the entire northern half of the land comes the shortest night. Days June 21 and 22 are the longest of the year. Night at the numbers at the latitude of Moscow continues all the 6 o'clock or 25 minutes a day or 17 hours 35 minutes. In this case, in fact light of the day even longer. It extended through a long and bright Dawn. After June 22 the sun each day rises later and sets earlier than the day before. Despite the loss of the day, it continues with the excess heat the earth, and next month is usually warmer than June. Day of the highest position of the sun at noon considered the beginning of astronomical summer quarter. Biological early summer, we believe, from the time when apple trees bloom in the gardens. On average, this coincides with the flowering of red clover. First period - from late flowering apple trees to flowering limes. On average, this period lasts from early June to mid July. Second period - from small-leaved lime trees blooming until the first frost in the soil. Average date of first flowering of small-leaved lime tree falls on July 10-13, and the average time the first frost on the soil surface, on September 14. This second period, naturally, falls into two halves, characterized primarily by their meteorological characteristics. The first half is the most warm season of the year when, despite the start of the reduction of the day, the degree of heating of the soil and water is kept still above the average temperature of the first year period. The second half is characterized by a noticeable drop in the temperature curve and the onset of cool, but in the end and the cold nights. The growth of this cooling leads finally to the emergence of the first frost matinees, which agreed to take over late summer and early autumn seasons. Sharp distinction between biological first and second half is difficult to hold. Conventionally, for an average strip, we believe the second half of August in order abroad, followed by the fall in average temperatures of each decade is quite sensitive and which therefore can take us beyond the end of a sultry summer pores.