In the rice soil with pH larger than 5.5, natural zeolite was better than lime, and in the rice soil with pH below 5.5, zeolite was not as good as lime.
The comparative results of fertility of different soil types show that the contents of N and P in the yellow soil is higher than those in rice soil and purple soil;
The proper nitrogen supply of the albic rice soils is 60-80kgN/hm2. The production function of nitrogen supply is y=5340+73.08x-0.4577x2 , r=0.95. Nitrogen supply showed certain capability of increasing production.
According to present case of nitrogen, phosphorous, potassium supply for rice in albic rice soils, crystallized the basic rule and method of keep nutrition balance on albic soils rice district, For improve the rice product ability in albic soils, protect the albic rice soils so that it can be used continuously try for high efficiency, good quality, low consumption, improve productivity, protect environment, provide scientific theory gist.
Paddy soil organic carbon densities (SOCD) in soil profile ranged from 0.53 to 446.2 kg/m2 (0 to 100 cm) while the paddy soil inorganic carbon densities (SICD) ranged from 0.05 to 90.03 kg/m2.
The Eh of the surface horizons of the paddy soils under the field conditions were +40, -12, -84, and -122 mV, respectively, while the Eh in the nonpaddy soils were close to +90 mV.
For example, the average content of Zn in vegetable garden soils was 2.5-4 times as much as in their originated soils, and was lower in paddy soils than in their originated soils.
By applying bromide ion as tracer, the channeling flow has been quantitatively described in saline rice soil and alkaline soil of Da'an City, Jilin Province of China.
muscorum, all isolated from a rice soil, were compared for their response in terms of growth and metabolic activities to the application of carbofuran.
The dynamics of basally applied 15N-labeled ammonium sulfate in inorganic and organic soil fractions of five wetland rice soils of the Philippines was studied in a greenhouse experiment.