This is because that organic matter enriched not only phosphorous in the highyieldsoil, but also increased soil phosphorous availability through decreasing absorption and fixation.
The highyield technique on the rice ridge cultivation were discussed from soil structure, water-thermal regime, oxidation-reduction potential and microorganism activity in paddy soils.
本文从土壤结构、水分、温度、氧化还原电位以及微生物活性等方面分析了水稻半旱栽培技术增产的原因。
3
In Huaibei area the unsuitable application of wheat variety, bad climate soil conditions, lower fertility and extensive cultivation were major limiting factors for high wheat yield in large areas.