We measured cobalt content in sorghum (Sorghum bicolor (L.) Moench.) by atomic absorption spectrophotometry: their absorbance and back ground values. These analyses were with AA-680 of Shimadzu. The mode was BGC; wave length, 240.8 ㎚, 240.7 ㎚, 240.6 ㎚, respectively. The recommended wave length is 240.7 ㎚ for Co analysis. It was done through several ratios among 4 factors; mean of absorbance(AM), standard deviation of absorbance (AS), mean of background(BM), standard deviation of background.(BS). The result was t㏊t 240.6 ㎚ was the favourable. And t㏊t of 240.8 ㎚ was better t㏊n t㏊t of 240.7 ㎚ for the Co analysis.

The aim of present research was to know Cd availability. As a first report of this work, we present some results of analysing soil Cd and Cu contents on a part of Burgundy in France. Soil samples were collected from surface-ploughed layer in fields across

Forage sorghum (Sorghum bicolor x S. bicolor) was cultivated for knowing the effect of alum sludge application on its root growth in a mountainous site, Kumsan. And the results obtained are as follows: The available P205 content in the soil seemed to decr

목초의 재생에 따른 칼륨(K)및 마그네슘(Mg)함량의 변화를 알아보기 위해 6가지 목초에 대해 수정액중의 K2O농도를 10 ppm및 300ppm으로 하여 수경재배실험을 수행했다. 약간의 예외가 있었으나 2처리구 모두 예취회수가 늘어갈수록 목초중 칼륨함량이 낮아졌으며, 이러한 경향은 콩과보다 화본과목초에서 두드러졌다.한편 목초중 마그네슘 량은 예취회수가 많아질수록 증가했다. 제 1차 예취때 높은 칼륨함량과 낮은 마그네슘함량으로 인해 K/Mg 함량비가