Study on monitoring of cultivation and manure in resources circulation type farm.

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Recently, the river water quality has becomes a problem in the livestock farming areas and the actual state grasping is demanded.In this paper, the effect of outflow water from catchment areas in livestock farming on water quality ware investigated in Aomori Prefecture. As a result, total nitrogen concentration was proportional to the grassland area ratio and increased and outflow rate of. total nitrogen from the grassland was 3.3 %. It has been shown that the load of SS, TP and DTP exceed 90 percent in snowmelt. In addition, it has been shown that SS, TP and DTP were discharged during the daytime and DTN was discharged during the nighttime.A system was developed to estimate grass chemical composition values at the field level. Six important grass chemical compositions were estimated using a sensing system with a hyper-spectral imaging sensor mounted on a tractor. Calibration models were obtained by using multiple linear regression, and accuracy was evaluated with three statistical analysis methods. These methods were the standard error of cross validation (SECV), the coefficient of determination, and the Bias used by cross-validation. The calibration models were evaluated the evaluation index (El). Results indicated good potential for the sensing system to estimate grass chemical composition.