An illustration of the fertilization of the egg by the spermatozooids of a Cyclospora Cayetanensis.

Fertilization of Cyclospora Cayetanensis

An illustration of the fertilization of the egg by the spermatozooids of a Cyclospora Cayetanensis.

An illustration of the fusion of egg and sperm-nuclei of a Cyclospora Cayetanensis.

Fusion of Egg and Sperm-nuclei of Cyclospora Cayetanensis

An illustration of the fusion of egg and sperm-nuclei of a Cyclospora Cayetanensis.

A fertilizer drill, which distributes fertilizer in a row at the desired quantity.

Fertilizer drill

A fertilizer drill, which distributes fertilizer in a row at the desired quantity.

A manure spreader in operation. The manure was pitched from the stable to the spreader, handled only once.

Manure spreader

A manure spreader in operation. The manure was pitched from the stable to the spreader, handled only…

A farmer spreading manure by throwing it in piles and spreading it around.

Spreading manure

A farmer spreading manure by throwing it in piles and spreading it around.

F farmer spreading manure with a shovel in a field.

Spreading manure

F farmer spreading manure with a shovel in a field.

A farmer spreading manure firectly from atop a wagon.

Spreading manure from a wagon

A farmer spreading manure firectly from atop a wagon.