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Studies on high yielding mathematical model and optimum scheme of agrotechnique of quality early rice zhou 903:

Wang Yuejun 1 & Wang Enyin 2 ( 1 Crop branch, Agricultural department of zhejiang province, Hangzhou 310004; 2 Jianhu agricultural extension station, Shaoxing, Zhejiang 312000)  
A current, rotational and combinational design of quadratic with different rates of seeding, planting density, N, K and P was carried out to study the high yielding mathematical model of cultivation technique and its optimum scheme of agrotechnique of quality early rice zhou 903. The results showed that the optimum scheme of yield (more than 500kg/mu) of zhou 903 was 38.85~40.26kg per mu for seeding, 26.2~26.8 thousand hills per mu, 11.22~11.70 kg N, 3.32~3.53kg K 2 O and 3.90~4.15kg P 2 O 5 per mu for fertilizer.
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