Increasing the Accuracy of Soil Nutrient Prediction by Improving Genetic Algorithm Backpropagation Neural Networks

Soil nutrient prediction has been eliciting increasing attention in agricultural production. Backpropagation (BP) neural networks have demonstrated remarkable ability in many prediction scenarios. However, directly utilizing BP neural networks in soil nutrient prediction may not yield promising resu...

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Vydáno v:Symmetry (Basel) Ročník 15; číslo 1; s. 151
Hlavní autoři: Liu, Yanqing, Jiang, Cuiqing, Lu, Cuiping, Wang, Zhao, Che, Wanliu
Médium: Journal Article
Jazyk:angličtina
Vydáno: Basel MDPI AG 01.01.2023
Témata:
Accuracy
Agricultural production
Algorithms
Analysis
Back propagation
Back propagation networks
Corn
Crops
Empirical analysis
Genetic algorithms
Irrigation
Machine learning
Moisture content
Neural networks
Nitrogen
Nutrients
Organic matter
Phosphorus
Potassium
Prediction models
Soil acidity
Soil chemistry
Soils
Time series
Water quality
China
Anhui China
ISSN:2073-8994, 2073-8994
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Shrnutí:Soil nutrient prediction has been eliciting increasing attention in agricultural production. Backpropagation (BP) neural networks have demonstrated remarkable ability in many prediction scenarios. However, directly utilizing BP neural networks in soil nutrient prediction may not yield promising results due to the random assignment of initial weights and thresholds and the tendency to fall into local extreme points. In this study, a BP neural network model optimized by an improved genetic algorithm (IGA) was proposed to predict soil nutrient time series with high accuracy. First, the crossover and mutation operations of the genetic algorithm (GA) were improved. Next, the IGA was used to optimize the BP model. The symmetric nature of the model lies in its feedforward and feedback connections, i.e., the same weights must be used for the forward and backward passes. An empirical evaluation was performed using annual soil nutrient data from China. Soil pH, total nitrogen, organic matter, fast-acting potassium, and effective phosphorus were selected as evaluation indicators. The prediction results of the IGA–BP, GA–BP, and BP neural network models were compared and analyzed. For the IGA–BP prediction model, the coefficient of determination for soil pH was 0.8, while those for total nitrogen, organic matter, fast-acting potassium, and effective phosphorus were all greater than 0.98, exhibiting a strong generalization ability. The root-mean-square errors of the IGA–BP prediction models were reduced to 50% of the BP models. The results indicated that the IGA–BP method can accurately predict soil nutrient content for future time series.
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ISSN:2073-8994
2073-8994
DOI:10.3390/sym15010151