In spite of the increasing use of synthetic fertilizers in agricultural practice and subsequent raise of crop yields, it is found generally that to maintain a high level of inherent fertility, their use must be accompanied by periodic applications of bulky organic manure, either in the form of farm manure, compost, or other organic by-product, rather of the farm or of certain industries. The maintenance of high productivity depends on a number of factors; the soil must be in the optimum condition for crop growth and must be in a position to furnish both food and water; it must have a suitable reaction in the chemical sense and it must contain no substances toxic to growth. It must be physically amenable to cultivation, resistant to forces of erosion and the micro-flora and micro- fauna must be of a character to meliorate the general chemical and physical properties of the soil and the soil- plant relationship. Any substance which when added to the soil brings about an improvement in any one of those directions could be considered as a fertilizer or manure using the terms in their widest sense, and it is in connection with these indirect benefits that organic manures are of such great importance in fertilizer practice. Задайте 5 вопросов к тексту ?
It was the day when I first time came to my friend. She had asked three of her friends to come but two of us couldn't do it for some reason. When I came she was very sad but happy to see me. We talked about everything for a while and then it was time for a lunch. My friend cooked chicken for me and it was extremely nice because she was vegetarian.
When the night came we went outside to see stars. But we couldn't see them because of clouds so we were sitting outside and talking about space and physics. My friend told me funny stories from her childhood. I was very happy. When it was time to go to bed my friend couldn't fall asleep so I sang her to sleep. The next day I found out that she liked it. I couldn't sleep all night. I was reading a book during that night.
I liked that day a lot. I'm going to do it again this summer.
Упражнение 2
Можете ли вы сопоставить числа в первом столбце таблицы с элементами в следующем столбце?
вторая колонка? (Обратите внимание, что некоторые цифры являются скорее приблизительными, чем точными.)
25 а) число австралийских городов с населением более 3 человек
миллион.
4 (B) год рождения Мела Гибсона.
7 700 000 (C) длина Большого Барьерного рифа в километрах.
130 000 (D) число стран с населением, превышающим численность населения
Австралия.
0 (E) процентная доля австралийских млекопитающих, которые не живут ни в одной стране мира.
в другой части света.
2000 (F) число людей, эмигрировавших в Австралию в 2005-2006 годах.
4 (G) население Канберры.
350 000 (H) процент австралийцев, родившихся в другой стране.
1956 (I) положение Австралии в таблице медалей в обоих последних двух случаях
Олимпийские игры.
52 (J) размер Австралии в квадратных километрах.
2 (K) количество раз, когда Австралия выигрывала чемпионат мира по футболу.
80 (L) население Австралии в 1900 году, в миллионах человек.
Объяснение: