This communication provides a preliminary approach to comprehensive yield forecast of some crops in a larger area. First, the yield data of maize, soybean and rice obtained in 55 cities and counties of the Northeast C...This communication provides a preliminary approach to comprehensive yield forecast of some crops in a larger area. First, the yield data of maize, soybean and rice obtained in 55 cities and counties of the Northeast China from 1951—1973 were used to analyse their relations to temperature,展开更多
China has a long history in the agricultural production. Agricultural development has always been restricted by scientific and technological levels and economical and climatic conditions, among which the climatic fact...China has a long history in the agricultural production. Agricultural development has always been restricted by scientific and technological levels and economical and climatic conditions, among which the climatic factor is a very important one. In fact, the fluctuation of food production has been closely connected with it and this has interested many people in recent years. According to the evolution of cultivated展开更多
The relationship between the developmental rate of crops and meteorological factors is not only a fundamental theory of agrometeorology, but also the foundation of agroclimatic division and agrometeorological forecast...The relationship between the developmental rate of crops and meteorological factors is not only a fundamental theory of agrometeorology, but also the foundation of agroclimatic division and agrometeorological forecasting as well. Therefore, some studies have been made on this by scientific workers at home and abroad. This paper provides a further approach to this subject on the basis of comparatively integral data.展开更多
Armyworm (Leucania separata Walker) is one of the most harmful insects to food production in China. It is in a habit of migration comprising four major processes, i.e. ascending, transmigration, descending and transla...Armyworm (Leucania separata Walker) is one of the most harmful insects to food production in China. It is in a habit of migration comprising four major processes, i.e. ascending, transmigration, descending and translation of the habitat after descending, The relation between these processes and the meteorological factors is seldom studied at home while its transmigration is studied abroad. However, the展开更多
文摘This communication provides a preliminary approach to comprehensive yield forecast of some crops in a larger area. First, the yield data of maize, soybean and rice obtained in 55 cities and counties of the Northeast China from 1951—1973 were used to analyse their relations to temperature,
文摘China has a long history in the agricultural production. Agricultural development has always been restricted by scientific and technological levels and economical and climatic conditions, among which the climatic factor is a very important one. In fact, the fluctuation of food production has been closely connected with it and this has interested many people in recent years. According to the evolution of cultivated
文摘The relationship between the developmental rate of crops and meteorological factors is not only a fundamental theory of agrometeorology, but also the foundation of agroclimatic division and agrometeorological forecasting as well. Therefore, some studies have been made on this by scientific workers at home and abroad. This paper provides a further approach to this subject on the basis of comparatively integral data.
文摘Armyworm (Leucania separata Walker) is one of the most harmful insects to food production in China. It is in a habit of migration comprising four major processes, i.e. ascending, transmigration, descending and translation of the habitat after descending, The relation between these processes and the meteorological factors is seldom studied at home while its transmigration is studied abroad. However, the
