The Deherain long-term field experiment was started in 1875 to study the
impact of fertilization on crop yield. Before 1875, the soil was
cultivated with alfalfa without fertilization. Between 1929 ...
This long term experiment began in 1972. The experimental site is a
tropical area, with a minimum annual temperature of 5.9 deg C, maximum
annual temperature of 42.8 deg C, and mean annual rainfall ...
This experiment was initiated in 1965 at a site that has been in
arable use for a very long time. The land use in this experiment
consists of a cropping sequence: Sugar beet, Spring oats, Winter
This experiment began in 1957 at a site that was cultivated for
several centuries before the start of the experiment. It has had no
manure (and no cattle) since 1912. The geology at the site is glacial ...
This experiment began in 1967 at a site that was originally
shrubland. The project consists of one rotation: Pearl
millet-wheat. Treatments = 1) Absolute control, 2) Farm yard manure
added, 3) N-fertilizer ...
This experiment began in 1975 at a cool temperate site with brown
calcereous, slightly hydromorphic soil. Before the experiment began
the soil had been cultivated for at least 20 years according to ...
This experiment began in 1942 at a cool temperate site. The Land use
and treatments in the project are as follows:
Land use: 4 categories: 1. 1942-1961; 2. 1942-1967; 3. 1967-1972; 4.