Cambridge science park: Sowing a seed

Ideal Sowing Depth for Sweetgum Seed

Seed was collected from a sweetgum tree in Washington County, Miss., in the fall of 1964 and stored at 35° to 40° F. for 4 months. Prior to sowing, the seed was stratified moist for 30 days at the same temperature. About 4 inches of loose silt loam was placed in 4inch clay pots. The soil was settled by sprinkling lightly with water and then leveled. Fifty seeds were placed in each pot and cover...

Cambridge Manuals of Science

These are two admirable little books in this most useful series published by the University Press, Cambridge. Mr. Gr. H. Carpenter, of Dublin, writes the little book on the insect's life-story and in very clear and even simple language he explains the facts and meanings of insect transformations. The story of the larval and pupal stages is very interesting. In the little book on The Flea Mr. Ha...

Single seed precise sowing of maize using computer simulation

In order to test the feasibility of computer simulation in field maize planting, the selection of the method of single seed precise sowing in maize is studied based on the quadratic function model Y = A×(D-Dm)2+Ym, which depicts the relationship between maize yield and planting density. And the advantages and disadvantages of the two planting methods under the condition of single seed sowing ar...

ENVIRONMENTAL SCIENCE. Conservation researchers get a new roost in Cambridge.

Effect of different sowing dates on Azivash (Corchorusolitorius) seed quality

This study was conducted at the Gorgan University of Agricultural Sciences and Natural Resources farm, Iran, Golestan province with about 600 mm annual rainfall in order to evaluate the effect of different sowing dates on Azivash (Corchorusolitorius) seed quality, using a randomized complete block design with three replications on 2013. Treatments were four sowing dates such as May 5, ...