我所附属试验场的水浇地,地处洋河灌区,土壤为草甸石灰性栗钙土,含有机质1.35%左右,全氮含量0-15厘米平均在0.084%,15—30厘米平均在0.080%。1964年种植玉米81亩(包括配种田10亩),共产83,623斤,平均亩产1,033斤,比1963年增产49.7%,比历史最高亩产量增产15.6%,比当地洋河灌区高产队增产35—40%。其中 The irrigated land attached to the test site of our institute is located in Yanghe Irrigation District. The soil is meadow limestone chestnut soil with organic matter of about 1.35%, the total nitrogen content of 0-15 cm is 0.084% on average, and the average of 15-30 cm is between 0.080%. In 1964, 81 mu of corn was planted (including 10 mu of mixed farming land) with a total output of 83,623 catties, an average yield of 1,033 catties, an increase of 49.7% over 1963, an increase of 15.6% over the highest yield in the history. 40%. among them