The soil and water experiment had been got on along with the experiment of mathematical model of comprehensive technique for high yield of millet, five factors and five levels.

The stimulation quadratic regression models of yield and value of flue -cured tobacco (Nicotiana tabacum L.) were established by the experiments designed in orthogonal rotation combination of five factors and five levels.

The comprehensive effects of the timing of watering and N and K fertilization(D),amount of irrigated water(W),and application rates of chemical N and K fertilizers,and farm manure(M) were studied by the design of orthogonal regression rotation with five factors and five levels under dry greenhouse condition.

Plot experiment was carried out in southern Ningxia by using the design of orthogonal regression rotation with periods and amount of applying water and fertilizer (p),amount of irrigation water (W),N,K and planting density (D) five factors and five levels to study the effect of them on potato yield.

Taking N485Q diesel engine as an example,five adjusting factors, valve timing, admission valve clearance, emission valve clearance, rotation speed and load rate are chosen. The five factors and five levels of experiments are designed.

The method of orthogonal rotation combination test design of five factors and five levels was used to study the effects of saccharification parameters on diacetyl reduction during beer brewing by extruded rice.

The high-yielding cultivation model for Xushu22 was established by means of quadratic orthogonal regressive rotation design with five factors and five levels. The effects of five factors on the yield were: potassium sulfate > urea >density > calcium superphosphate >transplanting date.

Five factors and five levels of their effect on the performance of the keel are established.

In 1983, the parameter tests were performed in field to establish a mathematic model under the no-irriggation condition. The contributiou order of testing factors to soybean yield is density >sowing date >phosphorous fertilizer >nitrogen fertilizer >potassium fertilizer.Searching for the optimization of the model with the computer, we assume that step is one, five factors and five levels a composed of 3125 designs yield in 618 designs reaches more than 400jin/mu. By frequency analysis, the best agronomic...

In 1983, the parameter tests were performed in field to establish a mathematic model under the no-irriggation condition. The contributiou order of testing factors to soybean yield is density >sowing date >phosphorous fertilizer >nitrogen fertilizer >potassium fertilizer.Searching for the optimization of the model with the computer, we assume that step is one, five factors and five levels a composed of 3125 designs yield in 618 designs reaches more than 400jin/mu. By frequency analysis, the best agronomic measures can be morked out and are listed below: the plant population is 18000-19000 plants/mu, sowing date is 6-8th of May, phosphate fertilizer is 30-33jin/mu, urea is 6.5jin/ mu, potassium sulphate is 22-24jin/mu.

A model for high-yield of rice was set with the gyatory design and the test was repeated at the same soil. The model not only reveals the yield-effeet of five fertilizer and their alternative effect, but also can be used to deduce the highest theoretical yield under the testing conditions, and provide abundant information for designing the best fertilizing measure of the rice production. F-test for the model passed by 5%, Searching for the optimazation of the model with the computer, we assume that step is one,...

A model for high-yield of rice was set with the gyatory design and the test was repeated at the same soil. The model not only reveals the yield-effeet of five fertilizer and their alternative effect, but also can be used to deduce the highest theoretical yield under the testing conditions, and provide abundant information for designing the best fertilizing measure of the rice production. F-test for the model passed by 5%, Searching for the optimazation of the model with the computer, we assume that step is one, five factors and five levels in each factor are composed of 3125 designs, and the yield in 1140 designs, yield step being 100 jin, is from 1,300 to 1,400 jin/mu, the frequency is the highest, therefore the best fertilizing measures can be worked out: Under other routine cultivating measures, if the ammonium sulphate was 109-112 jin/mu, calcium superphosphate (P O content 10%) 109-119 jin/mu, potassium chloride 17-18.8 jin/mu, Zinc Clelate 1.9-2.1 jin/mu, humie acid 96.9-105 jin/mu, then a yield of 1300-1400 jin/mu could be achieved with cultivar Jigeng No.8

The soil and water experiment had been got on along with the experiment of mathematical model of comprehensive technique for high yield of millet, five factors and five levels. On the bases, this paper probe into the relations among soil and water factors, cross-factors and boimass in growing period of millet, reported the water-use efficiency of 36 trial areas and analysed the difference of water-use efficfency to get a clear picture of the moisture rules soil and water rules under the nonirrigation...

The soil and water experiment had been got on along with the experiment of mathematical model of comprehensive technique for high yield of millet, five factors and five levels. On the bases, this paper probe into the relations among soil and water factors, cross-factors and boimass in growing period of millet, reported the water-use efficiency of 36 trial areas and analysed the difference of water-use efficfency to get a clear picture of the moisture rules soil and water rules under the nonirrigation conditions for high yield.