The repected Comrade
"Cooperative farms should rid themselves of the outdated practice of controlling the supply of water, fertilizers and agrochemicals by eye and hand measures, and turn to advanced manuring and cultivation methods based on scientific measurement and analysis."
Cooperative farms should rid themselves of the outdated practice of controlling the supply of water, fertilizers and agrochemicals by eye and hand measures, and turn to advanced manuring and cultivation methods based on scientific measurement and analysis, which is very important in solving food problem by putting agriculture on a scientific basis and increasing unit-area yields.
We suggested a mathematical model for means to find amounts of application rate of fertiliers or agrochemicals precisely, fast and easily in the agricultural reality. We made the manufacturing principle of a calibration scale, manufactured the scale and then introduced it to cooperative farms.
The problem in manufacturing the calibration scale is to indicate four amounts – amounts of agrochemicals or fertilizers to be applied and that of liquid to be sprayed per hectare, a capacity of a sprayer and relationships between amounts of agrochemicals or fertilizers to be put in it in the case that different agrochemicals and fertilizers are applied in paddy fields and dry fields - on one scale.
When amounts of liquid to be sprayed per hectare is divided by a capacity of the sprayer or amounts of agrochemicals or fertilizers to be applied by that of agrochemicals or fertilizers to be put per sprayer, the value is a using frequency of it. To make sure that four amounts have a definite relationship each other on one scale, the relationship between the remainers of amounts of two sets have to be equal.
a/b=c/d
log(a)-log(b)=log(c)-log(d)
This means that the relationship between four amounts can be obtained with one-at-a-thime calibration because a log(c) scale correponds with a log(d) scale if a log(a) scale correponds with a log(b) scale.
For example, if ㄱ (amounts to be sprayed per hectare) is a (100~1 200L), ㄴ (amounts of agrochemicals or fertilizers to be required per hectare) b (0.1kg~2kg), ㄷ (a capacity of a sprayer) c(10L, 12L, 15L, 18L, 20L) andㄹ(amounts of agrochemicals or fertilizers to be put in the sprayer) d(1g~200g), we can get the following scale.
If 0.3kg of agrochemicals is diluted with 800L of water and then the mixature is applied to a hectare, 3.75g of agrochemicals have to be put in 800L of water. If 0.3 in Scaleㄴcorresponds with 800 in Scale ㄱ on the calibration scale, 3.75 in Scale ㄹ correspond with 10 in Scale ㄷ. On the contrary, if we know the capacity of the sprayer and amounts of agrochemicals or fertilizers to be applied, we will get amounts of agrochemicals or fertilizers to be spray and that of agrochemicals or fertilizers precisely and fast.
The results show that a mathematical model was correct for manufacturing means to find application rate of agrochemicals or fertilizers in the agricultural reality and if we use calibration scales, agriculture can be put on a scientific basis on cooperative farms.
